[ https://issues.apache.org/jira/browse/ZOOKEEPER-981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Patrick Hunt updated ZOOKEEPER-981: ----------------------------------- Priority: Critical (was: Minor) Fix Version/s: 3.4.0 3.3.3 > Hang in zookeeper_close() in the multi-threaded C client > -------------------------------------------------------- > > Key: ZOOKEEPER-981 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-981 > Project: ZooKeeper > Issue Type: Bug > Components: c client > Affects Versions: 3.3.2 > Environment: Debian Squeeze, Linux 2.6.32-5, x86_64 > Reporter: Jeremy Stribling > Priority: Critical > Fix For: 3.3.3, 3.4.0 > > > I saw a hang once when my C++ application called the zookeeper_close() method > of the multi-threaded Zookeeper client library. The stack trace of the hung > thread was the following: > {quote} > Thread 8 (Thread 5644): > #0 0x00007f5d7bb5bbe4 in __lll_lock_wait () from /lib/libpthread.so.0 > #1 0x00007f5d7bb59ad0 in pthread_cond_broadcast@@GLIBC_2.3.2 () from > /lib/libpthread.so.0 > #2 0x00007f5d793628f6 in unlock_completion_list (l=0x32b4d68) at > .../zookeeper/src/c/src/mt_adaptor.c:66 > #3 0x00007f5d79354d4b in free_completions (zh=0x32b4c80, callCompletion=1, > reason=-116) at .../zookeeper/src/c/src/zookeeper.c:1069 > #4 0x00007f5d79355008 in cleanup_bufs (zh=0x32b4c80, callCompletion=1, > rc=-116) at .../thirdparty/zookeeper/src/c/src/zookeeper.c:1125 > #5 0x00007f5d79353200 in destroy (zh=0x32b4c80) at > .../thirdparty/zookeeper/src/c/src/zookeeper.c:366 > #6 0x00007f5d79358e0e in zookeeper_close (zh=0x32b4c80) at > .../zookeeper/src/c/src/zookeeper.c:2326 > #7 0x00007f5d79356d18 in api_epilog (zh=0x32b4c80, rc=0) at > .../zookeeper/src/c/src/zookeeper.c:1661 > #8 0x00007f5d79362f2f in adaptor_finish (zh=0x32b4c80) at > .../zookeeper/src/c/src/mt_adaptor.c:205 > #9 0x00007f5d79358c8c in zookeeper_close (zh=0x32b4c80) at > .../zookeeper/src/c/src/zookeeper.c:2297 > ... > {quote} > The omitted part of the stack trace is entirely within my application, and > contains no other calls to/from the Zookeeper client. In particular, I am > not calling zookeeper_close() from within a completion handler or any of the > library's threads. > I haven't been able to reproduce this, and when I encountered this I wasn't > capturing logging from the client library, so unfortunately I don't have any > more information at this time. But I will update this JIRA if I see it again. -- This message is automatically generated by JIRA. - For more information on JIRA, see: http://www.atlassian.com/software/jira