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From "jiraposter@reviews.apache.org (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4348) Add metrics for regions in transition
Date Fri, 30 Mar 2012 05:23:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13242074#comment-13242074

jiraposter@reviews.apache.org commented on HBASE-4348:

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(Updated 2012-03-30 05:21:12.616277)

Review request for hbase.


Changes done as per Jon and Ted's comments. Thanks.


This patch is for adding Region in transition metrics to the HMaster metrics system. It also
adds these metrics in the master ui, in the Region in transition section. I have attached
the proposed new format in the jira 4348.

This addresses bug HBase-4348.

Diffs (updated)

  src/main/jamon/org/apache/hadoop/hbase/tmpl/master/AssignmentManagerStatusTmpl.jamon 0dc0691

  src/main/java/org/apache/hadoop/hbase/HConstants.java 21ac4ba 
  src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java 64def15 
  src/main/java/org/apache/hadoop/hbase/master/HMaster.java 9bd4ace 
  src/main/java/org/apache/hadoop/hbase/master/metrics/MasterMetrics.java 83abc52 
  src/test/java/org/apache/hadoop/hbase/master/TestAssignmentManager.java 91dce36 

Diff: https://reviews.apache.org/r/4402/diff


Ran on a 5 node cluster and kill region servers randomly to observe the changes in the RIT
metrics as emitted out by the Master's mxbean;

mvn test passes without any failure.



> Add metrics for regions in transition
> -------------------------------------
>                 Key: HBASE-4348
>                 URL: https://issues.apache.org/jira/browse/HBASE-4348
>             Project: HBase
>          Issue Type: Improvement
>          Components: metrics
>    Affects Versions: 0.92.0
>            Reporter: Todd Lipcon
>            Assignee: Himanshu Vashishtha
>            Priority: Minor
>              Labels: noob
>         Attachments: 4348-metrics-v3.patch, 4348-v1.patch, 4348-v2.patch, RITs.png, RegionInTransitions2.png,
> The following metrics would be useful for monitoring the master:
> - the number of regions in transition
> - the number of regions in transition that have been in transition for more than a minute
> - how many seconds has the oldest region-in-transition been in transition

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