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https://issues.apache.org/jira/browse/THRIFT-2789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14227895#comment-14227895
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Sergey commented on THRIFT-2789:
--------------------------------
Qiao, could you please try this patch on your system? It doesn't change
exception handling (except logging), main thing it does is closing connection
on errors.
For me reliable way to reproduce FD leak was to attach strace to a running
process (strace -p <PID>), makes process consistently leaking descriptors even
under light load.
> TNonblockingServer leaks socket FD's under load
> -----------------------------------------------
>
> Key: THRIFT-2789
> URL: https://issues.apache.org/jira/browse/THRIFT-2789
> Project: Thrift
> Issue Type: Bug
> Components: C++ - Library
> Reporter: Sergey
> Attachments: D10015.diff
>
>
> I checked 0.9.2 and 1.0, but code didn't seem to change in 1.2 either.
> Problem is that network threads and worker threads use non-blocking socket
> (pipe) to communicate. Under heavy load writes to that pipe might fail with
> EAGAIN. While 'notifyIOThread' method carefully checks for the error and
> communicates the result via return value, not all callers check result of
> 'notify'.
> Generally it's hard to tell what appropriate handling of such a failure would
> be, but it's clear sockets shouldn't leak. Please use attached patch for the
> reference, but I do not insist what I did there is the best way to fix the
> problem.
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