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https://issues.apache.org/jira/browse/STRATOS-1430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14583663#comment-14583663
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Lasindu Charith commented on STRATOS-1430:
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Fixed in commit 03de83172309c2932075fb5284c120ca610bbf0a
> Stratos 4.1: Application fails to un-deploy completely under certain
> circumstances
> -----------------------------------------------------------------------------------
>
> Key: STRATOS-1430
> URL: https://issues.apache.org/jira/browse/STRATOS-1430
> Project: Stratos
> Issue Type: Bug
> Components: Autoscaler
> Affects Versions: 4.1.0 RC2
> Reporter: Martin Eppel
> Attachments: wso2carbon.zip
>
>
> • After the “Application undeployment process started” is started, there
> is a likelihood that (a few) VMs are still launched – I suspect this is due
> to some race condition between “Application undeployment process started” and
> the “autoscaler”.
> • All Vms which were launched before the “Application undeployment
> process started” get terminated as part of the undeployment process.
> • Vms which were launched after “Application undeployment process
> started” eventually get moved to obsolete / pending state and cleaned up,
> this can take up to 15- 20 minutes.
> • The application never gets completely removed,
> • The following exception is consistently observed:
> ID: [0] [STRATOS] [2015-06-05 20:47:07,237] WARN
> {org.apache.stratos.common.concurrent.locks.ReadWriteLock} - System warning!
> Trying to release a lock which has not been taken by the same thread:
> [lock-name] application-holder [thread-id] 114 [thread-name] pool-24-thread-2
> TID: [0] [STRATOS] [2015-06-05 20:47:07,237] ERROR
> {org.apache.stratos.messaging.message.receiver.topology.TopologyEventMessageDelegator}
> - Failed to retrieve topology event message
> org.apache.stratos.common.exception.InvalidLockRequestedException: System
> error, cannot acquire a write lock while having a read lock on the same
> thread: [lock-name] application-holder [thread-id] 114 [thread-name]
> pool-24-thread-2
> at
> org.apache.stratos.common.concurrent.locks.ReadWriteLock.acquireWriteLock(ReadWriteLock.java:114)
> at
> org.apache.stratos.autoscaler.applications.ApplicationHolder.acquireWriteLock(ApplicationHolder.java:60)
> •
> see also email thread (on dev list): Testing Stratos 4.1: Application
> undeployment: application fails to undeploy (nested grouping, group scaling)
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