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From "Ajay Jadhav (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-6188) Fix OOM issue with decommissioningNodesWatcher in the case of clusters with large number of nodes
Date Tue, 14 Feb 2017 18:28:42 GMT
Ajay Jadhav created YARN-6188:
---------------------------------

             Summary: Fix OOM issue with decommissioningNodesWatcher in the case of clusters
with large number of nodes
                 Key: YARN-6188
                 URL: https://issues.apache.org/jira/browse/YARN-6188
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.9.0
            Reporter: Ajay Jadhav
             Fix For: 2.9.0, 3.0.0-alpha1


LogDecommissioningNodesStatus method in DecommissioningNodesWatcher uses StringBuilder to
append status of all
decommissioning nodes for logging purpose.
In the case of large number of decommissioning nodes, this leads to OOM exception. The fix
scopes StringBuilder so that in case
of memory pressure, GC can kick in and free up the memory.

This is supposed to fix a bug introduced in https://issues.apache.org/jira/browse/YARN-4676



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