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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9645) Regionserver halt because of HLog's "Logic Error Snapshot seq id from earlier flush still present!"
Date Wed, 23 Oct 2013 23:34:42 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13803545#comment-13803545
] 

Hadoop QA commented on HBASE-9645:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12609920/9645v2.txt
  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/7610//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7610//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7610//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7610//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7610//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7610//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7610//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7610//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7610//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7610//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/7610//console

This message is automatically generated.

> Regionserver halt because of HLog's "Logic Error Snapshot seq id from earlier flush still
present!"
> ---------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-9645
>                 URL: https://issues.apache.org/jira/browse/HBASE-9645
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver, wal
>    Affects Versions: 0.94.10
>         Environment: Linux 2.6.32-el5.x86_64
>            Reporter: Victor Xu
>            Priority: Critical
>             Fix For: 0.98.0, 0.94.13, 0.96.1
>
>         Attachments: 9645v2.txt, HBASE_9645-0.94.10.patch
>
>
> I upgrade my hbase cluster to 0.94.10 three weeks ago, and this case happened several
days after that. I change the bug's priority to 'Critical' because every  time it happens,
a regionserver halt down. All of them have the same log:
> {noformat}
> ERROR org.apache.hadoop.hbase.regionserver.wal.HLog: Logic Error Snapshot seq id from
earlier flush still present! for region c0d88db4ce3606842fbec9d34c38f707 overwritten oldseq=80114270537with
new seq=80115066829
> {noformat}
> I check the code finding that it locates at HLog.startCacheFlush method. The 'lastSeqWritten'
has been locked. Maybe something wrong happened outside the HLog that change it by mistake.



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