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https://issues.apache.org/jira/browse/ZOOKEEPER-768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12864849#action_12864849
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Henry Robinson commented on ZOOKEEPER-768:
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Thanks Kapil - I'll take a look. From the stack trace it looks as though a
pending completion callback is null and therefore something weird is going on
with a completion dispatcher being freed before it is finished being used. As
per usual I can't reproduce on my machine, but this is enough information to
dig into it.
> zkpython segfault on close (assertion error in io thread)
> ---------------------------------------------------------
>
> Key: ZOOKEEPER-768
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-768
> Project: Zookeeper
> Issue Type: Bug
> Components: contrib-bindings
> Affects Versions: 3.4.0
> Environment: ubuntu lucid (10.04), zookeeper trunk (java/c/zkpython)
> Reporter: Kapil Thangavelu
> Attachments: zkpython-segfault-client-log.txt,
> zkpython-segfault-stack-traces.txt, zkpython-segfault.py
>
>
> While trying to create a test case showing slow average add_auth, i stumbled
> upon a test case that reliably segfaults for me, albeit with variable amount
> of iterations (anwhere from 0 to 20 typically). fwiw, I've got about 220
> processes in my test environment (ubuntu lucid 10.04). The test case opens a
> connection, adds authentication to it, and closes the connection, in a loop.
> I'm including the sample program and the gdb stack traces from the core file.
> I can upload the core file if thats helpful.
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