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From "Timothy Bish (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (AMQCPP-288) ResourceLifecycleManager needs to be thread-safe
Date Wed, 24 Feb 2010 13:46:40 GMT

     [ https://issues.apache.org/activemq/browse/AMQCPP-288?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Timothy Bish resolved AMQCPP-288.
---------------------------------

       Resolution: Fixed
    Fix Version/s: 3.2.0

Patch applied, thanks for the help.

> ResourceLifecycleManager needs to be thread-safe
> ------------------------------------------------
>
>                 Key: AMQCPP-288
>                 URL: https://issues.apache.org/activemq/browse/AMQCPP-288
>             Project: ActiveMQ C++ Client
>          Issue Type: Bug
>          Components: CMS Impl
>    Affects Versions: 3.0.1, 3.1
>            Reporter: Ivan Pechorin
>            Assignee: Timothy Bish
>             Fix For: 3.2.0
>
>         Attachments: AMQCPP_288_trunk.patch
>
>
> We use ActiveMQ C++ 3.x client in a multi-threaded application. In particular, we use
activemq::cmsutil::SessionPool and activemq::cmsutil::PooledSession. 
> Methods createCachedProducer and createCachedConsumer of class PooledSession do not synchronize
access to their shared ResourceLifecycleManager, and ResourceLifecycleManager itself is not
thread-safe. Therefore, it is not safe to use pooled session from multiple threads, even if
we guarantee that each PooledSession is used from one thread at any given time.
> To resolve this issue, ResourceLifecycleManager needs to be thread-safe, i.e. we need
to add synchronization to all of its add* methods. 

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