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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5283) Request counters may become negative for heavily loaded regions
Date Wed, 01 Feb 2012 00:42:57 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13197437#comment-13197437

Hadoop QA commented on HBASE-5283:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    -1 patch.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/883//console

This message is automatically generated.
> Request counters may become negative for heavily loaded regions
> ---------------------------------------------------------------
>                 Key: HBASE-5283
>                 URL: https://issues.apache.org/jira/browse/HBASE-5283
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.92.0
>            Reporter: Zhihong Yu
>            Assignee: Mubarak Seyed
>             Fix For: 0.94.0, 0.92.1
>         Attachments: HBASE-5283.trunk.v1.patch
> Requests counter showing negative count, example under 'Requests' column: -645470239
> {code}
> Name	Region Server	Start Key	End Key	Requests
> usertable,user2037516127892189021,1326756873774.16833e4566d1daef109b8fdcd1f4b5a6. 	xxx.com:60030
	user2037516127892189021 	user2296868939942738705 	-645470239
> {code}
> RegionLoad.readRequestsCount and RegionLoad.writeRequestsCount are of int type. Our Ops
has been running lots of heavy load operation. RegionLoad.getRequestsCount() overflows int.MAX_VALUE.
It is set to D986E7E1. In table.jsp, RegionLoad.getRequestsCount() is assigned to long type.
D986E7E1 is converted to long FFFFFFFFD986E7E1 which is -645470239 in decimal.
> Suggested fix is to make readRequestsCount and writeRequestsCount long type. 

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