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https://issues.apache.org/jira/browse/AMBARI-1465?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siddharth Wagle updated AMBARI-1465:
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Attachment: AMBARI-1465.patch
Patch for minimizing read lock acquisition
> Minimize Read and Write locks for createHosts
> ---------------------------------------------
>
> Key: AMBARI-1465
> URL: https://issues.apache.org/jira/browse/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
>
> Attachments: AMBARI-1465.patch
>
>
> 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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