[jira] [Assigned] (QPID-4168) Unhandled [rare] error condition in EpollPoller.cpp

["Andrew Stitcher (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/QPID-4168?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Stitcher reassigned QPID-4168:
-------------------------------------

    Assignee: Andrew Stitcher
    
> Unhandled [rare] error condition in EpollPoller.cpp
> ---------------------------------------------------
>
>                 Key: QPID-4168
>                 URL: https://issues.apache.org/jira/browse/QPID-4168
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Client
>    Affects Versions: 0.16
>         Environment: RHEL 6.2 (probably all POSIX targets)
>            Reporter: Rob Springer
>            Assignee: Andrew Stitcher
>            Priority: Minor
>
> There was a bug in one of our programs wherein a thread could call close() on what was effectively a random socket. 
> Occasionally, it would happen to call close() on the alwaysReadableFd 
> registered in the PollerPrivate constructor, which would result in an epoll 
> event for that FD to be returned in the call to epoll_wait() on line 568. It'd 
> then try to dereference the event's "ptr" element (which was set to 0x1 on 
> registration for that FD), which would lead to a segfault. 
> It's worth reiterating that the triggering bug is absolutely not in Qpid, so this isn't a core functionality issue - it's more of a graceful handling of a unexpected error condition.

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