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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7491) Add incremental blockreport latency to DN metrics
Date Wed, 11 Mar 2015 21:22:38 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7491?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Chris Nauroth updated HDFS-7491:
       Resolution: Fixed
    Fix Version/s: 2.7.0
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

+1 for the patch.  I committed this to trunk, branch-2 and branch-2.7.  Ming, thank you for
the patch.  Xiaoyu, thank you for assistance with the code review.

The test failures in the last Jenkins run were unrelated.  {{TestFileTruncate}} is a known
intermittent failure tracked elsewhere.  The other failures don't repro when I rerun them.

> Add incremental blockreport latency to DN metrics
> -------------------------------------------------
>                 Key: HDFS-7491
>                 URL: https://issues.apache.org/jira/browse/HDFS-7491
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>            Reporter: Ming Ma
>            Assignee: Ming Ma
>            Priority: Minor
>             Fix For: 2.7.0
>         Attachments: HDFS-7491-2.patch, HDFS-7491-3.patch, HDFS-7491-4.patch, HDFS-7491-branch-2.patch,
> In a busy cluster, IBR processing could be delayed due to NN FSNamesystem lock and cause
NN to throw NotReplicatedYetException to DFSClient and thus increase the overall application
> This will be taken care of when we address the NN FSNamesystem lock contention issue.
> It is useful if we can provide IBR latency metrics from DN's point of view.

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