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From "Nikolay Martynov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMQ-5109) "Soft deadlock" in TransportConnection causes degraded performance in certain situations
Date Wed, 19 Mar 2014 11:29:42 GMT

     [ https://issues.apache.org/jira/browse/AMQ-5109?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nikolay Martynov updated AMQ-5109:
----------------------------------

    Attachment: TransportConnection.java.patch

Attached patch that fixes problem for us

> "Soft deadlock" in TransportConnection causes degraded performance in certain situations
> ----------------------------------------------------------------------------------------
>
>                 Key: AMQ-5109
>                 URL: https://issues.apache.org/jira/browse/AMQ-5109
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.9.0
>         Environment: HP-UX 11.31, RHEL 5/6. HP JDK 6/7, Oracle JDK 6/7
>            Reporter: Nikolay Martynov
>            Priority: Minor
>              Labels: patch
>         Attachments: TransportConnection.java.patch
>
>
> "Soft" deadlock occurres due to async stopping in case of starting/stopping lots of client
connections (using jms template with standard connection factory, for example). ActiveMQ BrokerService
gets frozen for 1 second trying to acquire the lock. As a result, already poor performance
in case of unpooled connection factory further degrades by around 50%.



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