Deflake write-prepared and write-unprepared tests #8696
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Summary: The `JobContext::job_snapshot` referenced DB state but could have been deleted by a BG thread after the signal/unlock allowing shutdown to proceed. Then we would see an error like this (valgrind): ``` ==354104== Thread 2: ==354104== Invalid read of size 8 ==354104== at 0x694C4D: rocksdb::ManagedSnapshot::~ManagedSnapshot() (snapshot_impl.cc:20) ==354104== by 0x58F5BA: operator() (unique_ptr.h:81) ==354104== by 0x58F5BA: operator() (unique_ptr.h:75) ==354104== by 0x58F5BA: ~unique_ptr (unique_ptr.h:292) ==354104== by 0x58F5BA: rocksdb::JobContext::~JobContext() (job_context.h:221) ==354104== by 0x5F155E: rocksdb::DBImpl::BackgroundCallCompaction(rocksdb::DBImpl::PrepickedCompaction*, rocksdb::Env::Priority) (db_impl_compaction_flush.cc:2696) ==354104== by 0x5F1BC2: rocksdb::DBImpl::BGWorkCompaction(void*) (db_impl_compaction_flush.cc:2468) ==354104== by 0x83707A: operator() (std_function.h:688) ==354104== by 0x83707A: rocksdb::ThreadPoolImpl::Impl::BGThread(unsigned long) (threadpool_imp.cc:266) ==354104== by 0x8373ED: rocksdb::ThreadPoolImpl::Impl::BGThreadWrapper(void*) (threadpool_imp.cc:307) ==354104== by 0x492A800: execute_native_thread_routine (in /usr/local/fbcode/platform009/lib/libstdc++.so.6.0.28) ==354104== by 0x4A5020B: start_thread (in /usr/local/fbcode/platform009/lib/libpthread-2.30.so) ==354104== by 0x4CF281E: clone (in /usr/local/fbcode/platform009/lib/libc-2.30.so) ``` Test Plan: unable to repro Reviewers: Subscribers: Tasks: Tags:
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Summary: The `JobContext::job_snapshot` referenced DB state but could have been deleted by a BG thread after the signal/unlock allowing shutdown to proceed. Then we would see an error like this (valgrind): ``` ==354104== Thread 2: ==354104== Invalid read of size 8 ==354104== at 0x694C4D: rocksdb::ManagedSnapshot::~ManagedSnapshot() (snapshot_impl.cc:20) ==354104== by 0x58F5BA: operator() (unique_ptr.h:81) ==354104== by 0x58F5BA: operator() (unique_ptr.h:75) ==354104== by 0x58F5BA: ~unique_ptr (unique_ptr.h:292) ==354104== by 0x58F5BA: rocksdb::JobContext::~JobContext() (job_context.h:221) ==354104== by 0x5F155E: rocksdb::DBImpl::BackgroundCallCompaction(rocksdb::DBImpl::PrepickedCompaction*, rocksdb::Env::Priority) (db_impl_compaction_flush.cc:2696) ==354104== by 0x5F1BC2: rocksdb::DBImpl::BGWorkCompaction(void*) (db_impl_compaction_flush.cc:2468) ==354104== by 0x83707A: operator() (std_function.h:688) ==354104== by 0x83707A: rocksdb::ThreadPoolImpl::Impl::BGThread(unsigned long) (threadpool_imp.cc:266) ==354104== by 0x8373ED: rocksdb::ThreadPoolImpl::Impl::BGThreadWrapper(void*) (threadpool_imp.cc:307) ==354104== by 0x492A800: execute_native_thread_routine (in /usr/local/fbcode/platform009/lib/libstdc++.so.6.0.28) ==354104== by 0x4A5020B: start_thread (in /usr/local/fbcode/platform009/lib/libpthread-2.30.so) ==354104== by 0x4CF281E: clone (in /usr/local/fbcode/platform009/lib/libc-2.30.so) ``` Pull Request resolved: facebook/rocksdb#8696 Test Plan: unable to repro Reviewed By: pdillinger Differential Revision: D30505277 Pulled By: ajkr fbshipit-source-id: 5a99f34137cd14d06b0f624add6d37a70a61135d
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The
JobContext::job_snapshotreferenced DB state but couldhave been deleted by a BG thread after the signal/unlock allowing
shutdown to proceed. Then we would see an error like this (valgrind):
Test Plan: unable to repro