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Posted to hdfs-dev@hadoop.apache.org by "Chen Liang (JIRA)" <ji...@apache.org> on 2017/05/31 18:11:07 UTC

[jira] [Created] (HDFS-11906) Add log for NameNode#monitorHealth

Chen Liang created HDFS-11906:
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             Summary: Add log for NameNode#monitorHealth
                 Key: HDFS-11906
                 URL: https://issues.apache.org/jira/browse/HDFS-11906
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Chen Liang
            Assignee: Chen Liang
            Priority: Minor


We've seen cases where NN had long delays that we suspect were due to {{NameNode#monitorHealth}} was spending too much time on {{getNamesystem().checkAvailableResources();}}. However due to the lack of logging, it can be hard to verify.  This JIRA tries to add some log to this function, that display the actual time spent.

Thanks [~arpitagarwal] for the offline discussion.



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