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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 Mon, 19 Mar 2012 06:49:43 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13232484#comment-13232484

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

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(Updated 2012-03-19 06:48:19.158231)

Review request for hbase.

Summary (updated)

This patch is for addinf 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.


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

  src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java ae468ca 
  src/main/java/org/apache/hadoop/hbase/master/HMaster.java c4b4d30 
  src/main/java/org/apache/hadoop/hbase/master/metrics/MasterMetrics.java 83abc52 
  src/test/java/org/apache/hadoop/hbase/master/TestAssignmentManager.java d68ce33 

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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