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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5617) Provide coprocessor hooks in put flow while rollbackMemstore.
Date Thu, 29 Mar 2012 17:18:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13241399#comment-13241399
] 

Hadoop QA commented on HBASE-5617:
----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12520451/HBASE-5617_2.patch
  against trunk revision .

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

    +1 tests included.  The patch appears to include 6 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

     -1 core tests.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.regionserver.TestHRegion
                  org.apache.hadoop.hbase.mapreduce.TestImportTsv
                  org.apache.hadoop.hbase.mapred.TestTableMapReduce
                  org.apache.hadoop.hbase.mapreduce.TestHFileOutputFormat

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/1343//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/1343//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/1343//console

This message is automatically generated.
                
> Provide coprocessor hooks in put flow while rollbackMemstore.
> -------------------------------------------------------------
>
>                 Key: HBASE-5617
>                 URL: https://issues.apache.org/jira/browse/HBASE-5617
>             Project: HBase
>          Issue Type: Improvement
>          Components: coprocessors
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 0.96.0
>
>         Attachments: HBASE-5617_1.patch, HBASE-5617_2.patch
>
>
> With coprocessors hooks while put happens we have the provision to create new puts to
other tables or regions.  These puts can be done with writeToWal as false.
> In 0.94 and above the puts are first written to memstore and then to WAL.  If any failure
in the WAL append or sync the memstore is rollbacked.  
> Now the problem is that if the put that happens in the main flow fails there is no way
to rollback the 
> puts that happened in the prePut.
> We can add coprocessor hooks to like pre/postRoolBackMemStore.  Is any one hook enough
here?

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