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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9785) Fix heap size reporting in HRegion
Date Thu, 17 Oct 2013 03:27:42 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13797565#comment-13797565
] 

Hadoop QA commented on HBASE-9785:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12608829/HBase-9785.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  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.

    {color:green}+1 hadoop1.0{color}.  The patch compiles against the hadoop 1.0 profile.

    {color:green}+1 hadoop2.0{color}.  The patch compiles against the hadoop 2.0 profile.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

    {color:red}-1 site{color}.  The patch appears to cause mvn site goal to fail.

    {color:green}+1 core tests{color}.  The patch passed unit tests in .

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/7575//console

This message is automatically generated.

> Fix heap size reporting in HRegion
> ----------------------------------
>
>                 Key: HBASE-9785
>                 URL: https://issues.apache.org/jira/browse/HBASE-9785
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.96.0
>            Reporter: Himanshu Vashishtha
>             Fix For: 0.98.0, 0.96.1
>
>         Attachments: HBase-9785.patch
>
>
> The size reported by Fixed_Overhead variable in HRegion misses out on a boolean variable.
TestHeapSize doesn't report it because of the alignment we do to make it multiple of 8. 
> The equation for HRegion heap usage from Fixed_Overhead is: 
> Fixed_Overhead = align(100 + 42*ref + 1 arr) = align(284) = 288 on a 32 bit vm
> (On a 32 bit vm, 1 ref = 4bytes, 1 arr = 16 bytes)
> The equation formed using reflection (in Classsize) is:
> Expected_Overehead = align(101 + 42*ref + 1arr) = align(285) = 288.
> So, the testHeapSize doesn't fail currently.
> But if I add a reference (did in last patch in 8741), it starts failing because, now
the equations are:
> Fixed_Overhead = align(100 + 43*ref + 1 arr) = align(288) = 288
> Expected_Overhead = align(101 + 43*ref + 1 arr) = align(289) = 296.



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