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Posted to dev@ambari.apache.org by "Jonathan Hurley (JIRA)" <ji...@apache.org> on 2015/02/21 20:34:11 UTC

[jira] [Created] (AMBARI-9738) Ambari Server Deadlocks During Cluster Provisioning

Jonathan Hurley created AMBARI-9738:
---------------------------------------

             Summary: 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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