SuperServer could hung on database shutdown [CORE4952] #5243
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Modified by: @hvladassignee: Vlad Khorsun [ hvlad ] |
Modified by: @hvladstatus: Open [ 1 ] => Resolved [ 5 ] resolution: Fixed [ 1 ] Fix Version: 3.0 RC 1 [ 10584 ] |
Modified by: @hvladdescription: Internal deadlock could happen when database is shutting down. 1. Shutdown thread 00 ntdll!KiFastSystemCallRet engine12!Firebird::IProviderBaseImpl<Jrd::JProvider,Firebird::CheckStatusWrapper,Firebird::IPluginBaseImpl<Jrd::JProvider,Firebird::CheckStatusWrapper,Firebird::Inherit<Firebird::IReferenceCountedImpl<Jrd::JProvider,Firebird:: 2. cache_writer thread 00 ntdll!KiFastSystemCallRet cache_writer waits for bcb->bcb_syncObject forever => Internal deadlock could happen when database is shutting down. 1. Shutdown thread 00 ntdll!KiFastSystemCallRet CCH_shutdown owns bcb->bcb_syncObject and waits for bcb->bcb_writer_sem semaphore (signalling that cache_writer thread is gone) 2. cache_writer thread 00 ntdll!KiFastSystemCallRet cache_writer waits for bcb->bcb_syncObject forever and can't release bcb->bcb_writer_sem semaphore |
Modified by: @pavel-zotovstatus: Resolved [ 5 ] => Resolved [ 5 ] QA Status: No test => Deferred Test Details: Any suggestions about scenario how to check this using ISQL session(s) ? |
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Commented by: Sascha Michel (datiscum1) I hope the problem can be fixed even in 2.5.5, before it is released. |
Submitted by: @hvlad
Internal deadlock could happen when database is shutting down.
1. Shutdown thread
00 ntdll!KiFastSystemCallRet
01 kernel32!WaitForSingleObject+0x12
02 engine12!Firebird::Semaphore::tryEnter+0x20
03 engine12!CCH_shutdown+0x169
04 engine12!JRD_shutdown_database+0x571
CCH_shutdown owns bcb->bcb_syncObject and waits for bcb->bcb_writer_sem semaphore (signalling that cache_writer thread is gone)
2. cache_writer thread
00 ntdll!KiFastSystemCallRet
01 kernel32!WaitForSingleObject+0x12
02 engine12!Firebird::Synchronize::sleep+0x16
03 engine12!Firebird::Synchronize::sleep+0xe
04 engine12!Firebird::SyncObject::wait+0xbb
05 engine12!Firebird::SyncObject::lock+0xab
06 engine12!get_buffer+0x1ba
07 engine12!cache_writer+0x2a8
cache_writer waits for bcb->bcb_syncObject forever and can't release bcb->bcb_writer_sem semaphore
Commits: 79e9404 FirebirdSQL/fbt-repository@a69b7fc
====== Test Details ======
Any suggestions about scenario how to check this using ISQL session(s) ?
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