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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14229) Flushing canceled by coprocessor still leads to memstoreSize set down
Date Tue, 01 Sep 2015 11:41:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14725249#comment-14725249
] 

Hadoop QA commented on HBASE-14229:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12753511/HBASE-14229-0.98-v2.patch
  against 0.98 branch at commit 498c1845ab7b01710955153c27501fdc7492849d.
  ATTACHMENT ID: 12753511

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

    {color:green}+1 tests included{color}.  The patch appears to include 4 new or modified
tests.

    {color:red}-1 javac{color}.  The patch appears to cause mvn compile goal to fail with
Hadoop version 2.4.0.

    Compilation errors resume:
    [ERROR] Error invoking method 'get(java.lang.Integer)' in java.util.ArrayList at META-INF/LICENSE.vm[line
1619, column 22]
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-remote-resources-plugin:1.5:process
(default) on project hbase-assembly: Error rendering velocity resource. Error invoking method
'get(java.lang.Integer)' in java.util.ArrayList at META-INF/LICENSE.vm[line 1619, column 22]:
InvocationTargetException: Index: 0, Size: 0 -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following
articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :hbase-assembly
    

Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/15379//console

This message is automatically generated.

> Flushing canceled by coprocessor still leads to memstoreSize set down
> ---------------------------------------------------------------------
>
>                 Key: HBASE-14229
>                 URL: https://issues.apache.org/jira/browse/HBASE-14229
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.98.13, 1.0.2, 1.2.0, 1.1.1
>            Reporter: Yerui Sun
>         Attachments: HBASE-14229-0.98-v2.patch, HBASE-14229-0.98.patch, HBASE-14229-branch-1-v2.patch,
HBASE-14229-branch-1-v2.patch, HBASE-14229-branch-1.patch
>
>
> A Coprocessor override "public InternalScanner preFlush(final Store store, final InternalScanner
scanner)" and return NULL when calling this method, will cancel flush request, leaving snapshot
un-flushed, and no new storefile created. But the HRegion.internalFlushCache still set down
memstoreSize to 0 by totalFlushableSize. 
> If there's no write requests anymore, the memstoreSize will remaining as 0, and no more
flush quests will be processed because of the checking of memstoreSize.get() <=0 at the
beginning of internalFlushCache.
> This issue may not cause data loss, but it will confuse coprocessor users. If we argree
with this, I'll apply a patch later.



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