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From "Timothy Bish (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (AMQCPP-437) ActiveMQ crashes on subscribing one listener on several topics with a same session.
Date Fri, 26 Oct 2012 19:31:12 GMT

     [ https://issues.apache.org/jira/browse/AMQCPP-437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Timothy Bish resolved AMQCPP-437.
---------------------------------

    Resolution: Fixed

Fixed on trunk and the 3.4.x branch
                
> ActiveMQ crashes on subscribing one listener on several topics with a same session.
> -----------------------------------------------------------------------------------
>
>                 Key: AMQCPP-437
>                 URL: https://issues.apache.org/jira/browse/AMQCPP-437
>             Project: ActiveMQ C++ Client
>          Issue Type: Bug
>    Affects Versions: 3.4.3
>         Environment: Linux (Ubuntu 12.10) with gcc 4.4.
>            Reporter: Daniel Laügt
>            Assignee: Timothy Bish
>             Fix For: 3.5.0, 3.4.6
>
>         Attachments: ActiveMQSessionExecutor.cpp, ActiveMQSessionExecutor.cpp.patch,
test.cc
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> ActiveMQ crashes on subscribing one listener on several topics with a same session.
> It crashes on freeing an object in ActiveMQSessionExecutor::wakeup() and ActiveMQSessionExecutor::stop().
> Each time that a listener is subscribed to a topic, ActiveMQ stops the session. In ActiveMQSessionExecutor::stop(),
the shared pointer (this->taskRunner) is read but in the same time the shared pointer can
be modified by ActiveMQSessionExecutor::wakeup() when a message is received from the topic.
Reading and modifying a shared pointer is not thread safe and should be protected by a mutex.
> I've attached a test case and a proposal patch.

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