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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-9738) Ambari Server Deadlocks During Cluster Provisioning
Date Mon, 23 Feb 2015 17:33:12 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-9738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14333551#comment-14333551
] 

Hudson commented on AMBARI-9738:
--------------------------------

SUCCESS: Integrated in Ambari-trunk-Commit #1837 (See [https://builds.apache.org/job/Ambari-trunk-Commit/1837/])
AMBARI-9738 - Ambari Server Deadlocks During Cluster Provisioning (jonathanhurley) (jhurley:
http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=923bf81ae125ac6581cef053aa2c31baca1dcb65)
* ambari-server/src/main/java/org/apache/ambari/server/state/cluster/ClusterImpl.java
* ambari-server/src/test/java/org/apache/ambari/server/state/cluster/ClustersDeadlockTest.java
* ambari-server/src/main/java/org/apache/ambari/server/state/cluster/ClustersImpl.java


> Ambari Server Deadlocks During Cluster Provisioning
> ---------------------------------------------------
>
>                 Key: AMBARI-9738
>                 URL: https://issues.apache.org/jira/browse/AMBARI-9738
>             Project: Ambari
>          Issue Type: Bug
>    Affects Versions: 2.0.0
>            Reporter: Jonathan Hurley
>            Assignee: Jonathan Hurley
>            Priority: Critical
>             Fix For: 2.0.0
>
>         Attachments: ambariserverstack.txt
>
>
> During provisioning of a cluster, a deadlock scenario can occur between {{ClusterImpl}}
and {{ClustersImpl}}.
> {noformat}
> Thread-1
>   Clusters.mapHostsToCluster (writeLock)
>     Cluster.refresh (writeLock)
>     
> Thread-2
>   Cluster.convertToResponse (readLock)
>     Clusters.getHost (readLock)
>     
> Thread-1   Clusters.mapHostsToCluster (writeLock)
> Thread-2   Cluster.convertToResponse (readLock)
> Thread-1   Cluster.refresh (writeLock)  (BLOCKED by Thread-2)
> Thread-2   Clusters.getHost (readLock) (BLOCKED by Thread-1)
> {noformat}



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