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https://issues.apache.org/jira/browse/HBASE-5901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13266202#comment-13266202
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Hadoop QA commented on HBASE-5901:
----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12525223/hbase-5901.txt
  against trunk revision .

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

    -1 tests included.  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.

    +1 hadoop23.  The patch compiles against the hadoop 0.23.x profile.

    +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 appears to introduce 1 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.client.TestFromClientSide
                  org.apache.hadoop.hbase.io.hfile.TestForceCacheImportantBlocks

Test results: 
https://builds.apache.org/job/PreCommit-HBASE-Build/1712//testReport/
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HBASE-Build/1712//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: 
https://builds.apache.org/job/PreCommit-HBASE-Build/1712//console

This message is automatically generated.
                
> Use union type protobufs instead of class/byte pairs for multi requests
> -----------------------------------------------------------------------
>
>                 Key: HBASE-5901
>                 URL: https://issues.apache.org/jira/browse/HBASE-5901
>             Project: HBase
>          Issue Type: Improvement
>          Components: ipc, performance
>    Affects Versions: 0.96.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Critical
>         Attachments: hbase-5901.txt, hbase-5901.txt
>
>
> The current implementation of multi actions uses repeated "NameBytesPair"s 
> for the contents of multi actions. Instead, we should introduce a union type 
> protobuf for the valid actions. This makes the RPCs smaller since they don't 
> need to carry class names, and makes deserialization faster since it can 
> avoid some copying and reflection.

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