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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13877) Interrupt to flush from TableFlushProcedure causes dataloss in ITBLL
Date Wed, 10 Jun 2015 02:46:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14579894#comment-14579894
] 

Hadoop QA commented on HBASE-13877:
-----------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12738702/hbase-13877_v2-branch-1.1.patch
  against branch-1.1 branch at commit 14fe23254a78c52bdaef0da819268c8b405059cb.
  ATTACHMENT ID: 12738702

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

    {color:green}+1 tests included{color}.  The patch appears to include 3 new or modified
tests.

    {color:green}+1 hadoop versions{color}. The patch compiles with all supported hadoop versions
(2.4.1 2.5.2 2.6.0)

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

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

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

    {color:green}+1 checkstyle{color}.  The applied patch does not increase the total number
of checkstyle errors

    {color:green}+1 findbugs{color}.  The patch does not introduce any  new Findbugs (version
2.0.3) 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:green}+1 site{color}.  The mvn site goal succeeds with this patch.

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

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/14356//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/14356//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/14356//artifact/patchprocess/checkstyle-aggregate.html

  Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/14356//console

This message is automatically generated.

> Interrupt to flush from TableFlushProcedure causes dataloss in ITBLL
> --------------------------------------------------------------------
>
>                 Key: HBASE-13877
>                 URL: https://issues.apache.org/jira/browse/HBASE-13877
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>            Priority: Blocker
>             Fix For: 2.0.0, 1.2.0, 1.1.1
>
>         Attachments: hbase-13877_v1.patch, hbase-13877_v2-branch-1.1.patch
>
>
> ITBLL with 1.25B rows failed for me (and Stack as reported in https://issues.apache.org/jira/browse/HBASE-13811?focusedCommentId=14577834&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14577834)

> HBASE-13811 and HBASE-13853 fixed an issue with WAL edit filtering. 
> The root cause this time seems to be different. It is due to procedure based flush interrupting
the flush request in case the procedure is cancelled from an exception elsewhere. This leaves
the memstore snapshot intact without aborting the server. The next flush, then flushes the
previous memstore with the current seqId (as opposed to seqId from the memstore snapshot).
This creates an hfile with larger seqId than what its contents are. Previous behavior in 0.98
and 1.0 (I believe) is that after flush prepare and interruption / exception will cause RS
abort.



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