[jira] [Resolved] (QPID-4262) C++ broker crashes due to priority queue corruption

["Alan Conway (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/QPID-4262?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alan Conway resolved QPID-4262.
-------------------------------

    Resolution: Fixed
      Assignee: Alan Conway

Already fixed on trunk
                
> C++ broker crashes due to priority queue corruption
> ---------------------------------------------------
>
>                 Key: QPID-4262
>                 URL: https://issues.apache.org/jira/browse/QPID-4262
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: 0.18
>            Reporter: Jason Dillaman
>            Assignee: Alan Conway
>         Attachments: qpid-4262.patch
>
>
> When re-routing messages from a priority queue (via the queue's QMF purge method) back to the same queue, the PriorityQueue's "messages" deque will become out-of-sync with the state of its "fifo" MessageDeque.  Since the "messages" deque contains pointers into the "fifo" deque, this will lead to a broker crash as the pointers are no longer valid.  
> This issue occurs because "MessageDequeue::index()" will return index zero for messages that are sequenced prior the start of the deque.  
> Steps to reproduce:
> (1) Create a priority queue
> (2) Add several messages to the queue
> (3) Issue a purge on the queue such that the messages return to the same queue
> (4) Observe that the "messages" collection within the queue's PriorityQueue collection does not match its corresponding "fifo" collection.

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