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From "Chen Liang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11906) Add log for NameNode#monitorHealth
Date Wed, 31 May 2017 18:25:04 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Chen Liang updated HDFS-11906:
    Status: Patch Available  (was: Open)

> 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
>         Attachments: HDFS-11906.001.patch
> 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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