Kapil Thangavelu commented on ZOOKEEPER-768:

i've uploaded the core file here 

a little more poking around in gdb, shows the packet to be a ping one.

(gdb) print hdr
$8 = {xid = -2, zxid = 181, err = 0}

> 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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