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running","message":"MB-20054: Repro the scenario where bucket is deleted with DCPBackfill running\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"e51435335126352aafa47ff5e5a0ba46f1d92ecd","is_merged_in_target_branch":false,"change_id":"Ic2491ec654645ac8a0bcf1c69e6706a26a5ddabb","change_number":65519,"patch_set_number":1,"change_status":"ABANDONED"}],"branch":"refs/heads/3.0.x"},"2a20ae8c4289bd585050827aca8eb9b30123c6de":{"kind":"REWORK","_number":3,"created":"2016-07-06 16:59:59.000000000","uploader":{"_account_id":1000966,"name":"Dave 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test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"32a2c2fcc40efa7e84c42bfeffcb1eae28f8d950","is_merged_in_target_branch":false,"change_id":"Ia38db00d4f8cd84b2c90b5bddbd0bc01f51b61de","change_number":65516,"patch_set_number":2,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"2a09ecc545aa6dbd3399dd9fcbce017fb8699194":{"kind":"NO_CHANGE","_number":4,"created":"2016-07-06 17:01:08.000000000","uploader":{"_account_id":1000966,"name":"Dave Rigby","email":"daver@couchbase.com","username":"drigby","avatars":[{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/4","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/4","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/4 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/4 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/4 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/4 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/4","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/4 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"1c24926a9da6196185eea62ea296b8252bd14202","subject":"MB-20054: [BP] Add verbose (logging) output to ep_unit_tests_main"}],"author":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-06 10:43:36.000000000","tz":60},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-06 17:01:03.000000000","tz":60},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"1c24926a9da6196185eea62ea296b8252bd14202","is_merged_in_target_branch":false,"change_id":"Ia38db00d4f8cd84b2c90b5bddbd0bc01f51b61de","change_number":65516,"patch_set_number":3,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"d801b5642c1daeb16694bbc3286f909062ed9e57":{"kind":"NO_CHANGE","_number":5,"created":"2016-07-06 17:03:42.000000000","uploader":{"_account_id":1000966,"name":"Dave Rigby","email":"daver@couchbase.com","username":"drigby","avatars":[{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/5","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/5","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/5 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/5 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/5 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/5 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/5","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/5 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"ebe9652ec7ff49ab7551cdffd6ab780e46f45208","subject":"MB-20054: [BP] Add verbose (logging) output to ep_unit_tests_main"}],"author":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-06 10:43:36.000000000","tz":60},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-06 17:03:37.000000000","tz":60},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"ebe9652ec7ff49ab7551cdffd6ab780e46f45208","is_merged_in_target_branch":false,"change_id":"Ia38db00d4f8cd84b2c90b5bddbd0bc01f51b61de","change_number":65516,"patch_set_number":4,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"f23b6177063c68bd58bdf83e9be5f23660b9ff77":{"kind":"TRIVIAL_REBASE","_number":6,"created":"2016-07-06 17:06:37.000000000","uploader":{"_account_id":1000966,"name":"Dave Rigby","email":"daver@couchbase.com","username":"drigby","avatars":[{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/6","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/6","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/6 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/6 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/6 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/6 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/6","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/6 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"6f54e0d11339990c62976a19fa2d1c7db26e6b09","subject":"MB-20054: [BP] Add verbose (logging) output to ep_unit_tests_main"}],"author":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-06 10:43:36.000000000","tz":60},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-06 17:06:33.000000000","tz":60},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"6f54e0d11339990c62976a19fa2d1c7db26e6b09","is_merged_in_target_branch":false,"change_id":"Ia38db00d4f8cd84b2c90b5bddbd0bc01f51b61de","change_number":65516,"patch_set_number":5,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"1e4a33fe989c3159b61b76bd2a82cf6ae9446cd3":{"kind":"TRIVIAL_REBASE","_number":7,"created":"2016-07-06 17:41:30.000000000","uploader":{"_account_id":1000966,"name":"Dave Rigby","email":"daver@couchbase.com","username":"drigby","avatars":[{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/7","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/7","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/7 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/7 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/7 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/7 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/7","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/7 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"5e1ff9eb0574e4c4dc43bc959fdc9c01bf8b66bb","subject":"MB-20054: [BP] Add verbose (logging) output to ep_unit_tests_main"}],"author":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-06 10:43:36.000000000","tz":60},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-06 17:41:25.000000000","tz":60},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"5e1ff9eb0574e4c4dc43bc959fdc9c01bf8b66bb","is_merged_in_target_branch":false,"change_id":"Ia38db00d4f8cd84b2c90b5bddbd0bc01f51b61de","change_number":65516,"patch_set_number":6,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"7bc6802b57e7f246ccb741c19d39c8d2d37e01b8":{"kind":"REWORK","_number":8,"created":"2016-07-06 21:05:58.000000000","uploader":{"_account_id":1002736,"name":"Manu Dhundi","email":"manu@couchbase.com","username":"manu","avatars":[{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/8","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/8","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/8 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/8 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/8 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/8 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/8","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/8 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","subject":"MB-20054: Account for memory alloc/dealloc in unregisterBucket"}],"author":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-06 10:43:36.000000000","tz":60},"committer":{"name":"Manu Dhundi","email":"manu@couchbase.com","date":"2016-07-06 21:02:18.000000000","tz":-420},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","is_merged_in_target_branch":false,"change_id":"I5c260e3aa7e2c8d1fd4ff0a1ca20f2185a7362a8","change_number":65525,"patch_set_number":7,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"d1d647ba1b4c1ef0cad25d93fbdecde3041d0278":{"kind":"REWORK","_number":9,"created":"2016-07-07 00:19:11.000000000","uploader":{"_account_id":1002736,"name":"Manu Dhundi","email":"manu@couchbase.com","username":"manu","avatars":[{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/9","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/9","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/9 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/9 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/9 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/9 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/9","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/9 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","subject":"MB-20054: Account for memory alloc/dealloc in unregisterBucket"}],"author":{"name":"Manu Dhundi","email":"manu@couchbase.com","date":"2016-07-07 00:18:28.000000000","tz":-420},"committer":{"name":"Manu Dhundi","email":"manu@couchbase.com","date":"2016-07-07 00:18:28.000000000","tz":-420},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","is_merged_in_target_branch":false,"change_id":"I5c260e3aa7e2c8d1fd4ff0a1ca20f2185a7362a8","change_number":65525,"patch_set_number":7,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"13038f55ab3c905118168eccc3b2ac9cae01fa6e":{"kind":"REWORK","_number":10,"created":"2016-07-07 00:58:24.000000000","uploader":{"_account_id":1002736,"name":"Manu Dhundi","email":"manu@couchbase.com","username":"manu","avatars":[{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/10","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/10","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/10 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/10 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/10 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/10 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/10","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/10 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","subject":"MB-20054: Account for memory alloc/dealloc in unregisterBucket"}],"author":{"name":"Manu Dhundi","email":"manu@couchbase.com","date":"2016-07-07 00:57:45.000000000","tz":-420},"committer":{"name":"Manu Dhundi","email":"manu@couchbase.com","date":"2016-07-07 00:57:45.000000000","tz":-420},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","is_merged_in_target_branch":false,"change_id":"I5c260e3aa7e2c8d1fd4ff0a1ca20f2185a7362a8","change_number":65525,"patch_set_number":7,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"f91ac6e1bfbd55669d247e612ff20658ee874d06":{"kind":"REWORK","_number":11,"created":"2016-07-07 01:02:23.000000000","uploader":{"_account_id":1002736,"name":"Manu Dhundi","email":"manu@couchbase.com","username":"manu","avatars":[{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/ecea497ba2801645f19c844dd53cc4e1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/11","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/11","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/11 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/11 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/11 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/11 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/11","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/11 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","subject":"MB-20054: Account for memory alloc/dealloc in unregisterBucket"}],"author":{"name":"Manu Dhundi","email":"manu@couchbase.com","date":"2016-07-07 01:01:22.000000000","tz":-420},"committer":{"name":"Manu Dhundi","email":"manu@couchbase.com","date":"2016-07-07 01:01:22.000000000","tz":-420},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","is_merged_in_target_branch":false,"change_id":"I5c260e3aa7e2c8d1fd4ff0a1ca20f2185a7362a8","change_number":65525,"patch_set_number":7,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"2d4e611582560e510b451c5fb01a32b9dd4a65ef":{"kind":"REWORK","_number":12,"created":"2016-07-07 08:14:52.000000000","uploader":{"_account_id":1000966,"name":"Dave Rigby","email":"daver@couchbase.com","username":"drigby","avatars":[{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/12","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/12","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/12 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/12 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/12 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/12 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/12","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/12 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","subject":"MB-20054: Account for memory alloc/dealloc in unregisterBucket"}],"author":{"name":"Manu Dhundi","email":"manu@couchbase.com","date":"2016-07-07 01:01:22.000000000","tz":-420},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-07 08:14:43.000000000","tz":60},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","is_merged_in_target_branch":false,"change_id":"I5c260e3aa7e2c8d1fd4ff0a1ca20f2185a7362a8","change_number":65525,"patch_set_number":7,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"a4c0f1b4acc2f3deff8cf47f9ed62424615db316":{"kind":"REWORK","_number":13,"created":"2016-07-07 08:24:11.000000000","uploader":{"_account_id":1000966,"name":"Dave Rigby","email":"daver@couchbase.com","username":"drigby","avatars":[{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/13","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/13","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/13 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/13 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/13 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/13 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/13","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/13 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","subject":"MB-20054: Account for memory alloc/dealloc in unregisterBucket"}],"author":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-07 08:23:25.000000000","tz":60},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-07 08:24:02.000000000","tz":60},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"1cb1bb71db7627a7b6a14d6242a1ab301fd2ab9b","is_merged_in_target_branch":false,"change_id":"I5c260e3aa7e2c8d1fd4ff0a1ca20f2185a7362a8","change_number":65525,"patch_set_number":7,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"},"880d879b61953d70fee6bfbba16897bf56ad8ee6":{"kind":"NO_CODE_CHANGE","_number":14,"created":"2016-07-07 15:59:46.000000000","uploader":{"_account_id":1000966,"name":"Dave Rigby","email":"daver@couchbase.com","username":"drigby","avatars":[{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/20/65520/14","fetch":{"anonymous http":{"url":"https://review.couchbase.org/ep-engine","ref":"refs/changes/20/65520/14","commands":{"Branch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/14 \u0026\u0026 git checkout -b change-65520 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/14 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/14 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/14 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/ep-engine refs/changes/20/65520/14","Reset To":"git fetch https://review.couchbase.org/ep-engine refs/changes/20/65520/14 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"a417b8f76a03bab942f5219b7ba617f6cb006d5c","subject":"MB-20054: Account for memory alloc/dealloc in unregisterBucket"}],"author":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-07 08:23:25.000000000","tz":60},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2016-07-07 15:59:46.000000000","tz":0},"subject":"MB-20054: Regression test - bucket is deleted with DCPBackfill running","message":"MB-20054: Regression test - bucket is deleted with DCPBackfill running\n\nRegression test for MB-20054 - the following abort is encountered when\na DCPBackfill task is still running when a bucket is deleted:\n\n    Assertion failed: (engine), function verifyEngine, file\n    ep-engine/src/objectregistry.cc, line 58.\n\nThis issue occurs because the DCPBackfill object (and associated\nobjects ActiveStream and importantly ActiveStreams\u0027 readyQ of Items)\nis not deleted earlier in the shutdown sequence (via EvpDestroy), as\nwe use ref-counted pointers for it and there is a still an outstanding\nreference by the AuxIO Thread which is running the task. Hence the\nDCPBackfill object is only deleted when we finally unregister the\ndeleted bucket from the shared ExecutorPool - see the following\nbacktrace:\n\n    #1  0x00007f513b75a085 in abort () from /lib64/libc.so.6\n    #2  0x00007f51337034e2 in ObjectRegistry::onDeleteItem (pItem\u003d\u003cvalue optimized out\u003e) at ep-engine/src/objectregistry.cc:157\n    #3  0x00007f5133652094 in ~Item (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/item.h:352\n    #4  SingleThreadedRCPtr\u003cItem\u003e::~SingleThreadedRCPtr (this\u003d\u003cvalue optimized out\u003e) at ep-engine/src/atomic.h:430\n    #5  0x00007f51336c7f47 in ~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #6  MutationResponse::~MutationResponse (this\u003d0x3cd87880) at ep-engine/src/dcp-response.h:275\n    #7  0x00007f51336d86aa in clear_UNLOCKED (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.cc:201\n    #8  ~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:178\n    #9  ActiveStream::~ActiveStream (this\u003d0x7a3f5fa0) at ep-engine/src/dcp-stream.h:179\n    #10 0x00007f51336cc808 in RCPtr\u003cStream\u003e::~RCPtr (this\u003d0xb1823780) at ep-engine/src/atomic.h:348\n    #11 0x00007f51336d77c7 in ~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #12 DCPBackfill::~DCPBackfill (this\u003d0xb1823740) at ep-engine/src/dcp-stream.cc:114\n    #13 0x00007f513368d95f in ~SingleThreadedRCPtr (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/atomic.h:430\n    #14 ExecutorPool::_stopTaskGroup (this\u003d0x5b55a20, e\u003d0x59c4000, taskType\u003dNO_TASK_TYPE) at ep-engine/src/executorpool.cc:532\n    #15 0x00007f513368dad3 in ExecutorPool::_unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:551\n    #16 0x00007f513368e143 in ExecutorPool::unregisterBucket (this\u003d0x5b55a20, engine\u003d0x59c4000) at ep-engine/src/executorpool.cc:602\n    #17 0x00007f5133655f82 in EventuallyPersistentStore::~EventuallyPersistentStore (this\u003d0x59e6000)\n        at ep-engine/src/ep.cc:365\n    #18 0x00007f5133672a25 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x59c4000)\n        at ep-engine/src/ep_engine.cc:5791\n    #19 0x00007f5133672c95 in EvpDestroy (handle\u003d0x59c4000, force\u003d\u003cvalue optimized out\u003e) at ep-engine/src/ep_engine.cc:143\n\nTo actually reproduce the issue is somewhat involved - we need to\norchestrate the world such that we delete the engine while a\nDCPBackfill task is still running. We spin up a separate thread which\nwill run the DCPBackfill task concurrently with destroy - specifically\nDCPBackfill must start running (and add items to the readyQ) before\ndestroy(), it must then continue running (stop after) _stopTaskGroup\nis invoked.  To achieve this we use a couple of condition variables to\nsynchronise between the two threads - the timeline needs to look like:\n\n    auxIO thread:  [------- DCPBackfill ----------]\n     main thread:      [--destroy()--]       [ExecutorPool::_stopTaskGroup]\n\n    --------------------------------------------------------\u003e time\n\nChange-Id: Ic64c419cb8e4e0af2378efba9711b121aacee15b\nReviewed-on: http://review.couchbase.org/65520\nWell-Formed: buildbot \u003cbuild@couchbase.com\u003e\nTested-by: buildbot \u003cbuild@couchbase.com\u003e\nReviewed-by: Jim Walker \u003cjim@couchbase.com\u003e\n"},"parents_data":[{"branch_name":"refs/heads/3.0.x","commit_id":"a417b8f76a03bab942f5219b7ba617f6cb006d5c","is_merged_in_target_branch":true,"change_id":"I5c260e3aa7e2c8d1fd4ff0a1ca20f2185a7362a8","change_number":65525,"patch_set_number":8,"change_status":"MERGED"}],"branch":"refs/heads/3.0.x"}},"requirements":[],"submit_records":[],"submit_requirements":[]}