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https://issues.apache.org/jira/browse/ZOOKEEPER-4615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17927298#comment-17927298
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Gowrima commented on ZOOKEEPER-4615:
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[~bibmaster] log callback function pointer is copied to local variable
log_callback_fn fn which has the memory allocated on stack before freeing zh.
This shouldn't result in a segmentation fault.
> C сlient LOG_DEBUG after api_epilog uses freed handle
> -----------------------------------------------------
>
> Key: ZOOKEEPER-4615
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4615
> Project: ZooKeeper
> Issue Type: Bug
> Components: c client
> Reporter: Dmitry Sokolov
> Priority: Major
>
>
> {code:java}
> api_epilog(zh, 0);
> LOG_DEBUG(LOGCALLBACK(zh), "completion thread terminated"); {code}
> {code:java}
> api_epilog(zh, 0);
> LOG_DEBUG(LOGCALLBACK(zh), "IO thread terminated"); {code}
> Handle zh is freed in api_epilog.
> LOG_CALLBACK(zh) uses freed handle and may cause segmentation fault.
>
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