[jboss-jira] [JBoss JIRA] (JBAS-9481) race condition can break HASingleton functionality

[Dennis Reed (JIRA)]

     [ https://issues.jboss.org/browse/JBAS-9481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dennis Reed updated JBAS-9481:
------------------------------

    Attachment: JBAS-9481.btm

    
> race condition can break HASingleton functionality
> --------------------------------------------------
>
>                 Key: JBAS-9481
>                 URL: https://issues.jboss.org/browse/JBAS-9481
>             Project: Application Server 3  4  5 and 6
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Clustering
>    Affects Versions: JBossAS-5.1.0.GA
>            Reporter: Dennis Reed
>            Assignee: Paul Ferraro
>         Attachments: JBAS-9481.btm, test.jar
>
>
> HASingletonImpl#registerDRMListener has a race condition with partitionTopologyChanged, which can cause views to be processed
> out of order, and HASingletons to be started when they should be stopped, or stopped when they should be started.
> The problem is that the thread calling registerDRMListener (which calls partitionTopologyChanged) is not synchronized against other threads that call partitionTopologyChanged.
> This was introduced by the fix for https://issues.jboss.org/browse/JBAS-2647.
> To fix the issue, partitionTopology must process the view saved in viewReference in the correct order, and registerDRMListener's 
> call to partitionTopology must be synchronized against other threads calling it (without causing a regression of JBAS-2647).

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