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From "Siddharth Wagle (JIRA)" <>
Subject [jira] [Created] (AMBARI-1465) Minimize Read and Write locks for createHosts
Date Thu, 21 Feb 2013 23:58:12 GMT
Siddharth Wagle created AMBARI-1465:

             Summary: Minimize Read and Write locks for createHosts
                 Key: AMBARI-1465
             Project: Ambari
          Issue Type: Bug
          Components: controller
    Affects Versions: 1.2.2
            Reporter: Siddharth Wagle
            Assignee: Siddharth Wagle
             Fix For: 1.3.0

Invocation count and exec time for ClustersImpl.mapHostToCluser very high

org.apache.ambari.server.state.cluster.ClustersImpl.mapHostToCluster(String, String) 
Time(ms): 252,925 
Avg Time(ms): 5,269 
Own Time(ms): 211
Invocation Count: 48

Each time host is mapped to cluster we refresh the entity manager. This results in the createHosts
call taking excess of 10 minutes

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