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refs/changes/84/143784/1 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/kv_engine refs/changes/84/143784/1 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/kv_engine refs/changes/84/143784/1 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/kv_engine refs/changes/84/143784/1","Reset To":"git fetch https://review.couchbase.org/kv_engine refs/changes/84/143784/1 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"ba18bb4f9b23270e660aa565bf49eb15da7a64f9","subject":"MB-43680: Record JSON validation runtimes"}],"author":{"name":"James Harrison","email":"james.harrison@couchbase.com","date":"2021-01-19 11:25:57.000000000","tz":0},"committer":{"name":"James Harrison","email":"james.harrison@couchbase.com","date":"2021-01-19 11:25:57.000000000","tz":0},"subject":"MB-43717: Fix race in BasicLinkedList::purgeTombstones","message":"MB-43717: Fix race in BasicLinkedList::purgeTombstones\n\nThe list write lock must be held when updating the pausedPurgePoint to\navoid racing with updateListElem reading it.\n\n WARNING: ThreadSanitizer: data race (pid\u003d17198)\n   Read of size 8 at 0x7b4c00002d40 by thread T2 (mutexes: read M666668208119350224, write M838931151564315824, write M830768325700119856, write M825420198063385568):\n     #0 boost::intrusive::list_iterator\u003cboost::intrusive::mhtraits\u003cOrderedStoredValue, boost::intrusive::list_member_hook\u003c\u003e, \u0026OrderedStoredValue::seqno_hook\u003e, false\u003e::pointed_node() const \u003cnull\u003e (libep.so+0x0000003c5dd5)\n     #1 boost::intrusive::operator\u003d\u003d(boost::intrusive::list_iterator\u003cboost::intrusive::mhtraits\u003cOrderedStoredValue, boost::intrusive::list_member_hook\u003c\u003e, \u0026OrderedStoredValue::seqno_hook\u003e, false\u003e const\u0026, boost::intrusive::list_iterator\u003cboost::intrusive::mhtraits\u003cOrderedStoredValue, boost::intrusive::list_member_hook\u003c\u003e, \u0026OrderedStoredValue::seqno_hook\u003e, false\u003e const\u0026) tlm/deps/boost.exploded/include/boost/intrusive/detail/list_iterator.hpp:119 (libep.so+0x0000003c230b)\n     #2 BasicLinkedList::updateListElem(std::lock_guard\u003cstd::mutex\u003e\u0026, std::lock_guard\u003cstd::mutex\u003e\u0026, OrderedStoredValue\u0026) ../kv_engine/engines/ep/src/linked_list.cc:82 (libep.so+0x0000003bf176)\n     #3 EphemeralVBucket::modifySeqList(std::lock_guard\u003cstd::mutex\u003e\u0026, std::lock_guard\u003cstd::mutex\u003e\u0026, OrderedStoredValue\u0026) ../kv_engine/engines/ep/src/ephemeral_vb.cc:932 (libep.so+0x000000327553)\n\n...\n\n   Previous write of size 8 at 0x7b4c00002d40 by thread T30:\n     #0 boost::intrusive::list_iterator\u003cboost::intrusive::mhtraits\u003cOrderedStoredValue, boost::intrusive::list_member_hook\u003c\u003e, \u0026OrderedStoredValue::seqno_hook\u003e, false\u003e::operator\u003d(boost::intrusive::list_iterator\u003cboost::intrusive::mhtraits\u003cOrderedStoredValue, boost::intrusive::list_member_hook\u003c\u003e, \u0026OrderedStoredValue::seqno_hook\u003e, false\u003e const\u0026) tlm/deps/boost.exploded/include/boost/intrusive/detail/list_iterator.hpp:79 (libep.so+0x0000003c2436)\n     #1 BasicLinkedList::purgeTombstones(long, std::function\u003cbool (DocKey const\u0026, long)\u003e, std::function\u003cbool ()\u003e) ../kv_engine/engines/ep/src/linked_list.cc:360 (libep.so+0x0000003c03da)\n     #2 EphemeralVBucket::purgeStaleItems(std::function\u003cbool ()\u003e) ../kv_engine/engines/ep/src/ephemeral_vb.cc:391 (libep.so+0x000000326f56)\n     #3 EphemeralVBucket::StaleItemDeleter::visit(VBucket\u0026) ../kv_engine/engines/ep/src/ephemeral_tombstone_purger.cc:211 (libep.so+0x000000324a5e)\n     #4 KVBucket::pauseResumeVisit(PauseResumeVBVisitor\u0026, KVBucketIface::Position\u0026) ../kv_engine/engines/ep/src/kv_bucket.cc:2322 (libep.so+0x0000003831e8)\n     #5 EphTombstoneStaleItemDeleter::run() ../kv_engine/engines/ep/src/ephemeral_tombstone_purger.cc:280 (libep.so+0x0000003211dc)\n\nChange-Id: I5fd6d4bfeef5831420f9f6a472ba7bc817753c23\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"ba18bb4f9b23270e660aa565bf49eb15da7a64f9","is_merged_in_target_branch":true,"change_id":"I1c90ee8c815b7026dd42a9ec5b567f0519c3cec0","change_number":143528,"patch_set_number":4,"change_status":"MERGED"}],"branch":"refs/heads/master"},"56490d4f25394ba3ed9e49141cfc9d01b1258719":{"kind":"REWORK","_number":2,"created":"2021-01-19 19:46:39.000000000","uploader":{"_account_id":1000966,"name":"Dave 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refs/changes/84/143784/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/kv_engine refs/changes/84/143784/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/kv_engine refs/changes/84/143784/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/kv_engine refs/changes/84/143784/2","Reset To":"git fetch https://review.couchbase.org/kv_engine refs/changes/84/143784/2 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"c4c7499790b82c3e5f14c873b50c36eae2bb10a8","subject":"MB-43622: Fix race between DCP Open and scheduleDcpStep"}],"author":{"name":"James Harrison","email":"james.harrison@couchbase.com","date":"2021-01-19 11:25:57.000000000","tz":0},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2021-01-19 19:46:39.000000000","tz":0},"subject":"MB-43717: Fix race in BasicLinkedList::purgeTombstones","message":"MB-43717: Fix race in BasicLinkedList::purgeTombstones\n\nThe list write lock must be held when updating the pausedPurgePoint to\navoid racing with updateListElem reading it.\n\n WARNING: ThreadSanitizer: data race (pid\u003d17198)\n   Read of size 8 at 0x7b4c00002d40 by thread T2 (mutexes: read M666668208119350224, write M838931151564315824, write M830768325700119856, write M825420198063385568):\n     #0 boost::intrusive::list_iterator\u003cboost::intrusive::mhtraits\u003cOrderedStoredValue, boost::intrusive::list_member_hook\u003c\u003e, \u0026OrderedStoredValue::seqno_hook\u003e, false\u003e::pointed_node() const \u003cnull\u003e (libep.so+0x0000003c5dd5)\n     #1 boost::intrusive::operator\u003d\u003d(boost::intrusive::list_iterator\u003cboost::intrusive::mhtraits\u003cOrderedStoredValue, boost::intrusive::list_member_hook\u003c\u003e, \u0026OrderedStoredValue::seqno_hook\u003e, false\u003e const\u0026, boost::intrusive::list_iterator\u003cboost::intrusive::mhtraits\u003cOrderedStoredValue, boost::intrusive::list_member_hook\u003c\u003e, \u0026OrderedStoredValue::seqno_hook\u003e, false\u003e const\u0026) tlm/deps/boost.exploded/include/boost/intrusive/detail/list_iterator.hpp:119 (libep.so+0x0000003c230b)\n     #2 BasicLinkedList::updateListElem(std::lock_guard\u003cstd::mutex\u003e\u0026, std::lock_guard\u003cstd::mutex\u003e\u0026, OrderedStoredValue\u0026) ../kv_engine/engines/ep/src/linked_list.cc:82 (libep.so+0x0000003bf176)\n     #3 EphemeralVBucket::modifySeqList(std::lock_guard\u003cstd::mutex\u003e\u0026, std::lock_guard\u003cstd::mutex\u003e\u0026, OrderedStoredValue\u0026) ../kv_engine/engines/ep/src/ephemeral_vb.cc:932 (libep.so+0x000000327553)\n\n...\n\n   Previous write of size 8 at 0x7b4c00002d40 by thread T30:\n     #0 boost::intrusive::list_iterator\u003cboost::intrusive::mhtraits\u003cOrderedStoredValue, boost::intrusive::list_member_hook\u003c\u003e, \u0026OrderedStoredValue::seqno_hook\u003e, false\u003e::operator\u003d(boost::intrusive::list_iterator\u003cboost::intrusive::mhtraits\u003cOrderedStoredValue, boost::intrusive::list_member_hook\u003c\u003e, \u0026OrderedStoredValue::seqno_hook\u003e, false\u003e const\u0026) tlm/deps/boost.exploded/include/boost/intrusive/detail/list_iterator.hpp:79 (libep.so+0x0000003c2436)\n     #1 BasicLinkedList::purgeTombstones(long, std::function\u003cbool (DocKey const\u0026, long)\u003e, std::function\u003cbool ()\u003e) ../kv_engine/engines/ep/src/linked_list.cc:360 (libep.so+0x0000003c03da)\n     #2 EphemeralVBucket::purgeStaleItems(std::function\u003cbool ()\u003e) ../kv_engine/engines/ep/src/ephemeral_vb.cc:391 (libep.so+0x000000326f56)\n     #3 EphemeralVBucket::StaleItemDeleter::visit(VBucket\u0026) ../kv_engine/engines/ep/src/ephemeral_tombstone_purger.cc:211 (libep.so+0x000000324a5e)\n     #4 KVBucket::pauseResumeVisit(PauseResumeVBVisitor\u0026, KVBucketIface::Position\u0026) ../kv_engine/engines/ep/src/kv_bucket.cc:2322 (libep.so+0x0000003831e8)\n     #5 EphTombstoneStaleItemDeleter::run() ../kv_engine/engines/ep/src/ephemeral_tombstone_purger.cc:280 (libep.so+0x0000003211dc)\n\nChange-Id: I5fd6d4bfeef5831420f9f6a472ba7bc817753c23\nReviewed-on: http://review.couchbase.org/c/kv_engine/+/143784\nTested-by: Build Bot \u003cbuild@couchbase.com\u003e\nReviewed-by: Dave Rigby \u003cdaver@couchbase.com\u003e\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"c4c7499790b82c3e5f14c873b50c36eae2bb10a8","is_merged_in_target_branch":true,"change_id":"Ifa9b87b984af6be53934c8100e1a8d584c423c13","change_number":143492,"patch_set_number":12,"change_status":"MERGED"}],"branch":"refs/heads/master"}},"requirements":[],"submit_records":[{"status":"CLOSED","labels":[{"label":"Verified","status":"OK","applied_by":{"_account_id":1000011,"name":"Build 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