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https://issues.apache.org/jira/browse/QPID-2368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12805954#action_12805954
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Andrew Stitcher commented on QPID-2368:
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I had a quick look and couldn't find any other place in epoll where an
exception thrown could leak a file descriptor; could you be more specific in
your last comment.
> Exception Thrown at qpid/sys/epoll/EpollPoller.cpp:254 Leaves Orphan File
> Descriptor
> ------------------------------------------------------------------------------------
>
> Key: QPID-2368
> URL: https://issues.apache.org/jira/browse/QPID-2368
> Project: Qpid
> Issue Type: Bug
> Components: C++ Client
> Affects Versions: 0.5
> Environment: c++ client
> Reporter: Jason Schlauch
>
> While researching JIRA QPID-2367 I noticed a pileup of file descriptors in
> /proc/PID/fd. I traced the creation of these descriptors back to this chunk
> of code in qpid/sys/epoll/EpollPoller.cpp:
> 244 PollerPrivate() :
> 245 epollFd(::epoll_create(DefaultFds)),
> 246 isShutdown(false) {
> 247 QPID_POSIX_CHECK(epollFd);
> 248 ::sigemptyset(&sigMask);
> 249 // Add always readable fd into our set (but not listening to it
> yet)
> 250 ::epoll_event epe;
> 251 epe.events = 0;
> 252 epe.data.u64 = 0;
> 253 QPID_POSIX_CHECK(::epoll_ctl(epollFd, EPOLL_CTL_ADD,
> alwaysReadableFd, &epe));
> 254 }
> The problem is with the second QPID_POSIX_CHECK -- a macro that throws an
> exception. If an exception is thrown then the file descriptor allocated by
> epollFd(::epoll_create(DefaultFds)) is left dangling. A ::close(epollFd)
> would be needed in the catch() block to free it.
> There are a number of functions with a similar design in EpollPoller.cpp that
> might be similarly affected.
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