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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 Tue, 20 Mar 2012 21:15:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13233770#comment-13233770

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

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(Updated 2012-03-20 21:14:04.093757)

Review request for hbase.


Thanks for the review Greg. 
Updated to have a "OverThreshold" prefix. 


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/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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