The following bug has been logged on the website: Bug reference: 6578 Logged by: Deadlock in libpq Email address: rnysm...@yahoo.com PostgreSQL version: 8.4.11 Operating system: Ubuntu 11.04 Description:
We wrote a C++ program using libpq to access postgres. it is a heavy load service, about 100 concurrent postgres access. It works very well for two years. This month, we upgrade the libpq5 from 8.4.7 to 8.4.11.(libpq-dev 8.4.11-0ubuntu0.11.04) Our service program become unstable after upgrading. gdb shows that everything is halt at libpq (100 threads halt at the same position). #0 0x00007f0cec7377c4 in __lll_lock_wait () from /lib/x86_64-linux-gnu/libpthread.so.0 #1 0x00007f0cec7325b4 in _L_lock_944 () from /lib/x86_64-linux-gnu/libpthread.so.0 #2 0x00007f0cec7323ca in pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0 #3 0x00007f0ced10eaa0 in ?? () from /usr/lib/libpq.so.5 #4 0x00007f0cebb31085 in engine_table_select () from /lib/libcrypto.so.0.9.8 #5 0x00007f0cebb47228 in EVP_CipherInit_ex () from /lib/libcrypto.so.0.9.8 we tried to upgraded the libpq to 9.1.3, it will not deadlock but crash from time to time. After search the mailing list, we found someone else have the similar problem: http://archives.postgresql.org/pgsql-general/2011-03/msg00895.php -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs
