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deletion at destruction","message":"MB-34445: Do not schedule async vBucket deletion at destruction\n\nThis causes deadlock due to recursive locking of tMutex in ExecutorPool.\nFix this by setting the deferredDeletion flag to false which will\ncause all vBucket deletion to be done synchronously. See the below\nbacktrace.\n\nChange-Id: I70298a8337967c648280b0d86a96c08bf3a4008a\n15:05:37 #0  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135\n15:05:38 #1  0x00007f551159fdbd in __GI___pthread_mutex_lock (mutex\u003d0x7f5510435b08) at ../nptl/pthread_mutex_lock.c:80\n15:05:38 #2  0x00007f550af2ef9d in __gthread_mutex_lock (__mutex\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/x86_64-pc-linux-gnu/bits/gthr-default.h:748\n15:05:38 #3  std::mutex::lock (this\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:103\n15:05:38 #4  std::lock_guard\u003cstd::mutex\u003e::lock_guard (__m\u003d..., this\u003d\u003csynthetic pointer\u003e) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:162\n15:05:38 #5  ExecutorPool::_schedule (this\u003dthis@entry\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:420\n15:05:38 #6  0x00007f550af2f13d in ExecutorPool::schedule (this\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:440\n15:05:40 #7  0x00007f550af2ad1d in EphemeralVBucket::scheduleDeferredDeletion (this\u003d\u003coptimized out\u003e, engine\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ephemeral_vb.cc:841\n15:05:40 #8  0x00007f550af64dc1 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a3a9060) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #9  std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #10 std::__shared_ptr\u003cVBucket, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #11 std::shared_ptr\u003cVBucket\u003e::~shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #12 RespondAmbiguousNotification::~RespondAmbiguousNotification (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:226\n15:05:40 #13 0x00007f550af30849 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a41c340) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #14 std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #15 std::__shared_ptr\u003cGlobalTask, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #16 std::shared_ptr\u003cGlobalTask\u003e::~shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #17 ExecutorPool::_stopTaskGroup (this\u003d\u003coptimized out\u003e, taskGID\u003d140003322306560, taskType\u003d\u003coptimized out\u003e, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:612\n15:05:40 #18 0x00007f550af56cb8 in KVBucket::deinitialize (this\u003d0x7f5510495000) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:466\n15:05:40 #19 0x00007f550af09ee1 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6073\n15:05:40 #20 0x00007f550af0a0e7 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6079\n15:05:40 #21 EventuallyPersistentEngine::destroy (this\u003d0x7f55104b2000, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:155\n15:05:40 #22 0x000000000040ff0b in MockTestHarness::destroy_bucket (force\u003dfalse, handle\u003d0x7f55104f2aa0, this\u003d0x64c740 \u003charness\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1178\n15:05:40 #23 execute_test (default_cfg\u003d\u003coptimized out\u003e, engine\u003d\u003coptimized out\u003e, test\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1333\n15:05:40 #24 main (argc\u003d\u003coptimized out\u003e, argv\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1581\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"b69061b01d7f5251cf5effaa7a9d262540e0e5da","is_merged_in_target_branch":true,"change_id":"I7de7834d6b2148fd8ebfd1fcbb14711190c1a83d","change_number":110064,"patch_set_number":6,"change_status":"MERGED"}],"branch":"refs/heads/master"},"cb241367d91cf73d0f65894192f1bcc0c7c523b8":{"kind":"NO_CODE_CHANGE","_number":2,"created":"2019-06-04 15:47:50.000000000","uploader":{"_account_id":1004341,"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","username":"BenHuddleston","avatars":[{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/46/110146/2","fetch":{"anonymous http":{"url":"https://review.couchbase.org/kv_engine","ref":"refs/changes/46/110146/2","commands":{"Branch":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/2 \u0026\u0026 git checkout -b change-110146 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/kv_engine refs/changes/46/110146/2","Reset To":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/2 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"b69061b01d7f5251cf5effaa7a9d262540e0e5da","subject":"MB-34318: Do not reset SyncWrite::ackCount at topology reset."}],"author":{"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","date":"2019-06-04 15:45:55.000000000","tz":60},"committer":{"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","date":"2019-06-04 15:47:46.000000000","tz":60},"subject":"MB-34445: Do not schedule async vBucket deletion at destruction","message":"MB-34445: Do not schedule async vBucket deletion at destruction\n\nThis causes deadlock due to recursive locking of tMutex in ExecutorPool.\nFix this by setting the deferredDeletion flag to false which will\ncause all vBucket deletion to be done synchronously. See the below\nbacktrace.\n\n15:05:37 #0  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135\n15:05:38 #1  0x00007f551159fdbd in __GI___pthread_mutex_lock (mutex\u003d0x7f5510435b08) at ../nptl/pthread_mutex_lock.c:80\n15:05:38 #2  0x00007f550af2ef9d in __gthread_mutex_lock (__mutex\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/x86_64-pc-linux-gnu/bits/gthr-default.h:748\n15:05:38 #3  std::mutex::lock (this\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:103\n15:05:38 #4  std::lock_guard\u003cstd::mutex\u003e::lock_guard (__m\u003d..., this\u003d\u003csynthetic pointer\u003e) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:162\n15:05:38 #5  ExecutorPool::_schedule (this\u003dthis@entry\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:420\n15:05:38 #6  0x00007f550af2f13d in ExecutorPool::schedule (this\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:440\n15:05:40 #7  0x00007f550af2ad1d in EphemeralVBucket::scheduleDeferredDeletion (this\u003d\u003coptimized out\u003e, engine\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ephemeral_vb.cc:841\n15:05:40 #8  0x00007f550af64dc1 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a3a9060) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #9  std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #10 std::__shared_ptr\u003cVBucket, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #11 std::shared_ptr\u003cVBucket\u003e::~shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #12 RespondAmbiguousNotification::~RespondAmbiguousNotification (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:226\n15:05:40 #13 0x00007f550af30849 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a41c340) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #14 std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #15 std::__shared_ptr\u003cGlobalTask, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #16 std::shared_ptr\u003cGlobalTask\u003e::~shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #17 ExecutorPool::_stopTaskGroup (this\u003d\u003coptimized out\u003e, taskGID\u003d140003322306560, taskType\u003d\u003coptimized out\u003e, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:612\n15:05:40 #18 0x00007f550af56cb8 in KVBucket::deinitialize (this\u003d0x7f5510495000) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:466\n15:05:40 #19 0x00007f550af09ee1 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6073\n15:05:40 #20 0x00007f550af0a0e7 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6079\n15:05:40 #21 EventuallyPersistentEngine::destroy (this\u003d0x7f55104b2000, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:155\n15:05:40 #22 0x000000000040ff0b in MockTestHarness::destroy_bucket (force\u003dfalse, handle\u003d0x7f55104f2aa0, this\u003d0x64c740 \u003charness\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1178\n15:05:40 #23 execute_test (default_cfg\u003d\u003coptimized out\u003e, engine\u003d\u003coptimized out\u003e, test\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1333\n15:05:40 #24 main (argc\u003d\u003coptimized out\u003e, argv\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1581\n\nChange-Id: I70298a8337967c648280b0d86a96c08bf3a4008a\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"b69061b01d7f5251cf5effaa7a9d262540e0e5da","is_merged_in_target_branch":true,"change_id":"I7de7834d6b2148fd8ebfd1fcbb14711190c1a83d","change_number":110064,"patch_set_number":6,"change_status":"MERGED"}],"branch":"refs/heads/master"},"7e16ec109b3ae892dcdc39dfa2f4ba418b07a7b9":{"kind":"REWORK","_number":3,"created":"2019-06-05 11:38:49.000000000","uploader":{"_account_id":1004341,"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","username":"BenHuddleston","avatars":[{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/46/110146/3","fetch":{"anonymous http":{"url":"https://review.couchbase.org/kv_engine","ref":"refs/changes/46/110146/3","commands":{"Branch":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/3 \u0026\u0026 git checkout -b change-110146 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/3 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/3 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/3 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/kv_engine refs/changes/46/110146/3","Reset To":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/3 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"a5bb7ba6ad6cd3089f158e3c1187e6ef8ba8d832","subject":"Merge \"Merge couchbase/alice into couchbase/master\""}],"author":{"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","date":"2019-06-04 15:45:55.000000000","tz":60},"committer":{"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","date":"2019-06-05 11:38:23.000000000","tz":60},"subject":"MB-34445: Do not schedule async vBucket deletion at destruction","message":"MB-34445: Do not schedule async vBucket deletion at destruction\n\nThis causes deadlock due to recursive locking of tMutex in ExecutorPool.\nFix this by setting the deferredDeletion flag to false which will\ncause all vBucket deletion to be done synchronously. See the below\nbacktrace.\n\n15:05:37 #0  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135\n15:05:38 #1  0x00007f551159fdbd in __GI___pthread_mutex_lock (mutex\u003d0x7f5510435b08) at ../nptl/pthread_mutex_lock.c:80\n15:05:38 #2  0x00007f550af2ef9d in __gthread_mutex_lock (__mutex\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/x86_64-pc-linux-gnu/bits/gthr-default.h:748\n15:05:38 #3  std::mutex::lock (this\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:103\n15:05:38 #4  std::lock_guard\u003cstd::mutex\u003e::lock_guard (__m\u003d..., this\u003d\u003csynthetic pointer\u003e) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:162\n15:05:38 #5  ExecutorPool::_schedule (this\u003dthis@entry\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:420\n15:05:38 #6  0x00007f550af2f13d in ExecutorPool::schedule (this\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:440\n15:05:40 #7  0x00007f550af2ad1d in EphemeralVBucket::scheduleDeferredDeletion (this\u003d\u003coptimized out\u003e, engine\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ephemeral_vb.cc:841\n15:05:40 #8  0x00007f550af64dc1 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a3a9060) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #9  std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #10 std::__shared_ptr\u003cVBucket, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #11 std::shared_ptr\u003cVBucket\u003e::~shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #12 RespondAmbiguousNotification::~RespondAmbiguousNotification (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:226\n15:05:40 #13 0x00007f550af30849 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a41c340) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #14 std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #15 std::__shared_ptr\u003cGlobalTask, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #16 std::shared_ptr\u003cGlobalTask\u003e::~shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #17 ExecutorPool::_stopTaskGroup (this\u003d\u003coptimized out\u003e, taskGID\u003d140003322306560, taskType\u003d\u003coptimized out\u003e, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:612\n15:05:40 #18 0x00007f550af56cb8 in KVBucket::deinitialize (this\u003d0x7f5510495000) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:466\n15:05:40 #19 0x00007f550af09ee1 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6073\n15:05:40 #20 0x00007f550af0a0e7 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6079\n15:05:40 #21 EventuallyPersistentEngine::destroy (this\u003d0x7f55104b2000, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:155\n15:05:40 #22 0x000000000040ff0b in MockTestHarness::destroy_bucket (force\u003dfalse, handle\u003d0x7f55104f2aa0, this\u003d0x64c740 \u003charness\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1178\n15:05:40 #23 execute_test (default_cfg\u003d\u003coptimized out\u003e, engine\u003d\u003coptimized out\u003e, test\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1333\n15:05:40 #24 main (argc\u003d\u003coptimized out\u003e, argv\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1581\n\nChange-Id: I70298a8337967c648280b0d86a96c08bf3a4008a\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"a5bb7ba6ad6cd3089f158e3c1187e6ef8ba8d832","is_merged_in_target_branch":true}],"branch":"refs/heads/master"},"c006b7a42b9372c8df5238f4f2aa4c4555cd5fde":{"kind":"REWORK","_number":4,"created":"2019-06-05 11:44:06.000000000","uploader":{"_account_id":1004341,"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","username":"BenHuddleston","avatars":[{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/46/110146/4","fetch":{"anonymous http":{"url":"https://review.couchbase.org/kv_engine","ref":"refs/changes/46/110146/4","commands":{"Branch":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/4 \u0026\u0026 git checkout -b change-110146 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/4 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/4 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/4 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/kv_engine refs/changes/46/110146/4","Reset To":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/4 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"a5bb7ba6ad6cd3089f158e3c1187e6ef8ba8d832","subject":"Merge \"Merge couchbase/alice into couchbase/master\""}],"author":{"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","date":"2019-06-04 15:45:55.000000000","tz":60},"committer":{"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","date":"2019-06-05 11:43:33.000000000","tz":60},"subject":"MB-34445: RespondAmbiguous task should not own a vBucket.","message":"MB-34445: RespondAmbiguous task should not own a vBucket.\n\nThis causes deadlock due to recursive locking of tMutex in ExecutorPool\nif the task is the last thing that owns a vBucket and is attempting to\nschedule deferred deletion.\n\nFix this by holding a weak pointer instead. If we promote the pointer\nthen we are running normally and won\u0027t have previously acquired tMutex.\nIf we are cancelling the task at destruction of the engine, we will not\nattempt to delete the vBucket.\n\n15:05:37 #0  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135\n15:05:38 #1  0x00007f551159fdbd in __GI___pthread_mutex_lock (mutex\u003d0x7f5510435b08) at ../nptl/pthread_mutex_lock.c:80\n15:05:38 #2  0x00007f550af2ef9d in __gthread_mutex_lock (__mutex\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/x86_64-pc-linux-gnu/bits/gthr-default.h:748\n15:05:38 #3  std::mutex::lock (this\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:103\n15:05:38 #4  std::lock_guard\u003cstd::mutex\u003e::lock_guard (__m\u003d..., this\u003d\u003csynthetic pointer\u003e) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:162\n15:05:38 #5  ExecutorPool::_schedule (this\u003dthis@entry\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:420\n15:05:38 #6  0x00007f550af2f13d in ExecutorPool::schedule (this\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:440\n15:05:40 #7  0x00007f550af2ad1d in EphemeralVBucket::scheduleDeferredDeletion (this\u003d\u003coptimized out\u003e, engine\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ephemeral_vb.cc:841\n15:05:40 #8  0x00007f550af64dc1 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a3a9060) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #9  std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #10 std::__shared_ptr\u003cVBucket, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #11 std::shared_ptr\u003cVBucket\u003e::~shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #12 RespondAmbiguousNotification::~RespondAmbiguousNotification (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:226\n15:05:40 #13 0x00007f550af30849 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a41c340) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #14 std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #15 std::__shared_ptr\u003cGlobalTask, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #16 std::shared_ptr\u003cGlobalTask\u003e::~shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #17 ExecutorPool::_stopTaskGroup (this\u003d\u003coptimized out\u003e, taskGID\u003d140003322306560, taskType\u003d\u003coptimized out\u003e, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:612\n15:05:40 #18 0x00007f550af56cb8 in KVBucket::deinitialize (this\u003d0x7f5510495000) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:466\n15:05:40 #19 0x00007f550af09ee1 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6073\n15:05:40 #20 0x00007f550af0a0e7 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6079\n15:05:40 #21 EventuallyPersistentEngine::destroy (this\u003d0x7f55104b2000, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:155\n15:05:40 #22 0x000000000040ff0b in MockTestHarness::destroy_bucket (force\u003dfalse, handle\u003d0x7f55104f2aa0, this\u003d0x64c740 \u003charness\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1178\n15:05:40 #23 execute_test (default_cfg\u003d\u003coptimized out\u003e, engine\u003d\u003coptimized out\u003e, test\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1333\n15:05:40 #24 main (argc\u003d\u003coptimized out\u003e, argv\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1581\n\nChange-Id: I70298a8337967c648280b0d86a96c08bf3a4008a\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"a5bb7ba6ad6cd3089f158e3c1187e6ef8ba8d832","is_merged_in_target_branch":true}],"branch":"refs/heads/master"},"36fc6aa3c7a0293b577021793becc4426f106c7e":{"kind":"REWORK","_number":5,"created":"2019-06-05 12:52:40.000000000","uploader":{"_account_id":1004341,"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","username":"BenHuddleston","avatars":[{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/ccb3e7e3b52c3d14e759d1b4c0507a3b.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/46/110146/5","fetch":{"anonymous http":{"url":"https://review.couchbase.org/kv_engine","ref":"refs/changes/46/110146/5","commands":{"Branch":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/5 \u0026\u0026 git checkout -b change-110146 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/5 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/5 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/5 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/kv_engine refs/changes/46/110146/5","Reset To":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/5 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"a5bb7ba6ad6cd3089f158e3c1187e6ef8ba8d832","subject":"Merge \"Merge couchbase/alice into couchbase/master\""}],"author":{"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","date":"2019-06-04 15:45:55.000000000","tz":60},"committer":{"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","date":"2019-06-05 12:52:37.000000000","tz":0},"subject":"MB-34445: RespondAmbiguous task should not own a vBucket.","message":"MB-34445: RespondAmbiguous task should not own a vBucket.\n\nThis causes deadlock due to recursive locking of tMutex in ExecutorPool\nif the task is the last thing that owns a vBucket and is attempting to\nschedule deferred deletion.\n\nFix this by holding a weak pointer instead. If we promote the pointer\nthen we are running normally and won\u0027t have previously acquired tMutex.\nIf we are cancelling the task at destruction of the engine, we will not\nattempt to delete the vBucket.\n\n15:05:37 #0  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135\n15:05:38 #1  0x00007f551159fdbd in __GI___pthread_mutex_lock (mutex\u003d0x7f5510435b08) at ../nptl/pthread_mutex_lock.c:80\n15:05:38 #2  0x00007f550af2ef9d in __gthread_mutex_lock (__mutex\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/x86_64-pc-linux-gnu/bits/gthr-default.h:748\n15:05:38 #3  std::mutex::lock (this\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:103\n15:05:38 #4  std::lock_guard\u003cstd::mutex\u003e::lock_guard (__m\u003d..., this\u003d\u003csynthetic pointer\u003e) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:162\n15:05:38 #5  ExecutorPool::_schedule (this\u003dthis@entry\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:420\n15:05:38 #6  0x00007f550af2f13d in ExecutorPool::schedule (this\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:440\n15:05:40 #7  0x00007f550af2ad1d in EphemeralVBucket::scheduleDeferredDeletion (this\u003d\u003coptimized out\u003e, engine\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ephemeral_vb.cc:841\n15:05:40 #8  0x00007f550af64dc1 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a3a9060) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #9  std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #10 std::__shared_ptr\u003cVBucket, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #11 std::shared_ptr\u003cVBucket\u003e::~shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #12 RespondAmbiguousNotification::~RespondAmbiguousNotification (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:226\n15:05:40 #13 0x00007f550af30849 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a41c340) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #14 std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #15 std::__shared_ptr\u003cGlobalTask, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #16 std::shared_ptr\u003cGlobalTask\u003e::~shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #17 ExecutorPool::_stopTaskGroup (this\u003d\u003coptimized out\u003e, taskGID\u003d140003322306560, taskType\u003d\u003coptimized out\u003e, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:612\n15:05:40 #18 0x00007f550af56cb8 in KVBucket::deinitialize (this\u003d0x7f5510495000) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:466\n15:05:40 #19 0x00007f550af09ee1 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6073\n15:05:40 #20 0x00007f550af0a0e7 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6079\n15:05:40 #21 EventuallyPersistentEngine::destroy (this\u003d0x7f55104b2000, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:155\n15:05:40 #22 0x000000000040ff0b in MockTestHarness::destroy_bucket (force\u003dfalse, handle\u003d0x7f55104f2aa0, this\u003d0x64c740 \u003charness\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1178\n15:05:40 #23 execute_test (default_cfg\u003d\u003coptimized out\u003e, engine\u003d\u003coptimized out\u003e, test\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1333\n15:05:40 #24 main (argc\u003d\u003coptimized out\u003e, argv\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1581\n\nChange-Id: I70298a8337967c648280b0d86a96c08bf3a4008a\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"a5bb7ba6ad6cd3089f158e3c1187e6ef8ba8d832","is_merged_in_target_branch":true}],"branch":"refs/heads/master"},"f8d08e0f112228d4220b7ec5a0dc95fb20c49e18":{"kind":"REWORK","_number":6,"created":"2019-06-06 11:00:16.000000000","uploader":{"_account_id":1000002,"name":"Trond Norbye","display_name":"Trond","email":"trond.norbye@couchbase.com","username":"trond","avatars":[{"url":"https://www.gravatar.com/avatar/1521a1fa74885ab7b9748113afe689cc.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/1521a1fa74885ab7b9748113afe689cc.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/1521a1fa74885ab7b9748113afe689cc.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/1521a1fa74885ab7b9748113afe689cc.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/46/110146/6","fetch":{"anonymous http":{"url":"https://review.couchbase.org/kv_engine","ref":"refs/changes/46/110146/6","commands":{"Branch":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/6 \u0026\u0026 git checkout -b change-110146 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/6 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/6 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/6 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/kv_engine refs/changes/46/110146/6","Reset To":"git fetch https://review.couchbase.org/kv_engine refs/changes/46/110146/6 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"33033905b667902cad53092d5b62884a1356796d","subject":"Move HashTableDepthStatVisitor to it\u0027s own file"}],"author":{"name":"Ben Huddleston","email":"ben.huddleston@couchbase.com","date":"2019-06-04 15:45:55.000000000","tz":60},"committer":{"name":"Trond Norbye","email":"trond.norbye@couchbase.com","date":"2019-06-06 11:00:16.000000000","tz":0},"subject":"MB-34445: RespondAmbiguous task should not own a vBucket.","message":"MB-34445: RespondAmbiguous task should not own a vBucket.\n\nThis causes deadlock due to recursive locking of tMutex in ExecutorPool\nif the task is the last thing that owns a vBucket and is attempting to\nschedule deferred deletion.\n\nFix this by holding a weak pointer instead. If we promote the pointer\nthen we are running normally and won\u0027t have previously acquired tMutex.\nIf we are cancelling the task at destruction of the engine, we will not\nattempt to delete the vBucket.\n\n15:05:37 #0  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135\n15:05:38 #1  0x00007f551159fdbd in __GI___pthread_mutex_lock (mutex\u003d0x7f5510435b08) at ../nptl/pthread_mutex_lock.c:80\n15:05:38 #2  0x00007f550af2ef9d in __gthread_mutex_lock (__mutex\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/x86_64-pc-linux-gnu/bits/gthr-default.h:748\n15:05:38 #3  std::mutex::lock (this\u003d0x7f5510435b08) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:103\n15:05:38 #4  std::lock_guard\u003cstd::mutex\u003e::lock_guard (__m\u003d..., this\u003d\u003csynthetic pointer\u003e) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:162\n15:05:38 #5  ExecutorPool::_schedule (this\u003dthis@entry\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:420\n15:05:38 #6  0x00007f550af2f13d in ExecutorPool::schedule (this\u003d0x7f5510435a00, task\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:440\n15:05:40 #7  0x00007f550af2ad1d in EphemeralVBucket::scheduleDeferredDeletion (this\u003d\u003coptimized out\u003e, engine\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ephemeral_vb.cc:841\n15:05:40 #8  0x00007f550af64dc1 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a3a9060) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #9  std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #10 std::__shared_ptr\u003cVBucket, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #11 std::shared_ptr\u003cVBucket\u003e::~shared_ptr (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #12 RespondAmbiguousNotification::~RespondAmbiguousNotification (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:226\n15:05:40 #13 0x00007f550af30849 in std::_Sp_counted_base\u003c(__gnu_cxx::_Lock_policy)2\u003e::_M_release (this\u003d0x7f550a41c340) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:154\n15:05:40 #14 std::__shared_count\u003c(__gnu_cxx::_Lock_policy)2\u003e::~__shared_count (this\u003d\u003coptimized out\u003e, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:684\n15:05:40 #15 std::__shared_ptr\u003cGlobalTask, (__gnu_cxx::_Lock_policy)2\u003e::~__shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr_base.h:1123\n15:05:40 #16 std::shared_ptr\u003cGlobalTask\u003e::~shared_ptr (this\u003d0x7ffe6ec46730, __in_chrg\u003d\u003coptimized out\u003e) at /usr/local/include/c++/7.3.0/bits/shared_ptr.h:93\n15:05:40 #17 ExecutorPool::_stopTaskGroup (this\u003d\u003coptimized out\u003e, taskGID\u003d140003322306560, taskType\u003d\u003coptimized out\u003e, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/executorpool.cc:612\n15:05:40 #18 0x00007f550af56cb8 in KVBucket::deinitialize (this\u003d0x7f5510495000) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/kv_bucket.cc:466\n15:05:40 #19 0x00007f550af09ee1 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6073\n15:05:40 #20 0x00007f550af0a0e7 in EventuallyPersistentEngine::~EventuallyPersistentEngine (this\u003d0x7f55104b2000, __in_chrg\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:6079\n15:05:40 #21 EventuallyPersistentEngine::destroy (this\u003d0x7f55104b2000, force\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/engines/ep/src/ep_engine.cc:155\n15:05:40 #22 0x000000000040ff0b in MockTestHarness::destroy_bucket (force\u003dfalse, handle\u003d0x7f55104f2aa0, this\u003d0x64c740 \u003charness\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1178\n15:05:40 #23 execute_test (default_cfg\u003d\u003coptimized out\u003e, engine\u003d\u003coptimized out\u003e, test\u003d...) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1333\n15:05:40 #24 main (argc\u003d\u003coptimized out\u003e, argv\u003d\u003coptimized out\u003e) at /home/couchbase/jenkins/workspace/kv_engine-linux-master-CE/kv_engine/programs/engine_testapp/engine_testapp.cc:1581\n\nChange-Id: I70298a8337967c648280b0d86a96c08bf3a4008a\nReviewed-on: http://review.couchbase.org/110146\nReviewed-by: Dave Rigby \u003cdaver@couchbase.com\u003e\nTested-by: Build Bot \u003cbuild@couchbase.com\u003e\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"33033905b667902cad53092d5b62884a1356796d","is_merged_in_target_branch":true,"change_id":"I7ab3f4fb0c27c360cdcb8d965ecc8fe8ccfffa53","change_number":110226,"patch_set_number":2,"change_status":"MERGED"}],"branch":"refs/heads/master"}},"requirements":[],"submit_records":[],"submit_requirements":[]}