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From "Udayanga Wickramasinghe (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AXIS2-5152) RepositoryListener ConcurrentModification Exception when accessing DeploymentEngine deployerMap
Date Fri, 07 Oct 2011 10:38:29 GMT

     [ https://issues.apache.org/jira/browse/AXIS2-5152?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Udayanga Wickramasinghe updated AXIS2-5152:
-------------------------------------------

    Attachment: AXIS2-5152_update.patch

i am attaching the patch which uses concurrent Hash Map for this issue . please review and
commit , the most appropriate solution. personally i prefer the patch i submitted earlier
since it would be the most simple and consistent solution with the existing implementation
:)
                
> RepositoryListener ConcurrentModification Exception when accessing DeploymentEngine deployerMap
> -----------------------------------------------------------------------------------------------
>
>                 Key: AXIS2-5152
>                 URL: https://issues.apache.org/jira/browse/AXIS2-5152
>             Project: Axis2
>          Issue Type: Bug
>          Components: kernel
>            Reporter: Udayanga Wickramasinghe
>         Attachments: AXIS2-5152.patch, AXIS2-5152_update.patch
>
>
> Axis2 DeploymentEngine deployerMap seems to be not thread safe. Following exception can
be thrown when there is a high concurrent acceess scenario with multiple deployers in place..
> Exception in thread "Timer-3" java.util.ConcurrentModificationException
>         at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
>         at java.util.HashMap$EntryIterator.next(HashMap.java:834)
>         at java.util.HashMap$EntryIterator.next(HashMap.java:832)
>         at org.apache.axis2.deployment.RepositoryListener.loadOtherDirectories(R
> epositoryListener.java:270)
>         at org.apache.axis2.deployment.RepositoryListener.checkServices(Reposito
> ryListener.java:253)
>         at org.apache.axis2.deployment.RepositoryListener.startListener(Reposito
> ryListener.java:365)
>         at org.apache.axis2.deployment.scheduler.SchedulerTask.checkRepository(S
> chedulerTask.java:73)
>         at org.apache.axis2.deployment.scheduler.SchedulerTask.run(SchedulerTask
> .java:94)
>         at org.apache.axis2.deployment.scheduler.Scheduler$SchedulerTimerTask.ru
> n(Scheduler.java:93)
>         at java.util.TimerThread.mainLoop(Timer.java:512)
>         at java.util.TimerThread.run(Timer.java:462)

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