[jira] Commented: (ZOOKEEPER-768) zkpython segfault on close (assertion error in io thread)
[ https://issues.apache.org/jira/browse/ZOOKEEPER-768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12864849#action_12864849 ] Henry Robinson commented on ZOOKEEPER-768: -- 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. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-768) zkpython segfault on close (assertion error in io thread)
[
https://issues.apache.org/jira/browse/ZOOKEEPER-768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12864873#action_12864873
]
Kapil Thangavelu commented on ZOOKEEPER-768:
i've uploaded the core file here
http://kapilt.com/files/zkpython-segfault-on-close-core.bz2
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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
