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https://issues.apache.org/jira/browse/ZOOKEEPER-981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12996497#comment-12996497
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tsulin commented on ZOOKEEPER-981:
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sorry for upload many times. my network sucks.
stack trace:
{code:none}
#1 0x0000003e75a0b0c0 in pthread_cond_broadcast@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
#2 0x00002ad3f8a504c1 in unlock_completion_list () from
/usr/lib/libzookeeper_mt.so.2
#3 0x00002ad3f8a46f47 in free_completions () from /usr/lib/libzookeeper_mt.so.2
#4 0x00002ad3f8a47152 in cleanup_bufs () from /usr/lib/libzookeeper_mt.so.2
#5 0x00002ad3f8a471b5 in destroy () from /usr/lib/libzookeeper_mt.so.2
#6 0x00002ad3f8a4731c in zookeeper_close () from /usr/lib/libzookeeper_mt.so.2
#7 0x00002ad3f8a474e8 in api_epilog () from /usr/lib/libzookeeper_mt.so.2
#8 0x00002ad3f8a47370 in zookeeper_close () from /usr/lib/libzookeeper_mt.so.2
#9 0x0000000000401aed in zookeeper_client::~zookeeper_client() ()
#10 0x0000000000401744 in main ()
{code}
or
{code:none}
#1 0x0000003e75a0b0c0 in pthread_cond_broadcast@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
#2 0x00002ad98e6a485a in adaptor_finish () from /usr/lib/libzookeeper_mt.so.2
#3 0x00002ad98e69b370 in zookeeper_close () from /usr/lib/libzookeeper_mt.so.2
#4 0x0000000000401ae5 in zookeeper_client::~zookeeper_client() ()
#5 0x000000000040173b in main ()
{code}
> 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
>
> Attachments: ZOOKEEPER-981.tar.gz
>
>
> 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.
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