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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12761) On region jump ClientScanners should get next row start key instead of a skip.
Date Mon, 29 Dec 2014 12:30:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14260075#comment-14260075
] 

Hadoop QA commented on HBASE-12761:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12689318/HBASE-12761-v2.patch
  against master branch at commit fbdaf62bf837abd74eca8b13e8786051ed4df38a.
  ATTACHMENT ID: 12689318

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

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac 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:red}-1 core tests{color}.  The patch failed these unit tests:
     

     {color:red}-1 core zombie tests{color}.  There are 1 zombie test(s): 	at org.jboss.arquillian.container.test.impl.client.ContainerEventController.execute(ContainerEventController.java:108)
	at org.jboss.arquillian.test.impl.TestContextHandler.createClassContext(TestContextHandler.java:75)
	at org.jboss.arquillian.test.impl.TestContextHandler.createSuiteContext(TestContextHandler.java:60)
	at org.jboss.arquillian.test.impl.EventTestRunnerAdaptor.afterClass(EventTestRunnerAdaptor.java:87)

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-annotations.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/newPatchFindbugsWarningshbase-rest.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//artifact/patchprocess/checkstyle-aggregate.html

  Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/12245//console

This message is automatically generated.

> On region jump ClientScanners should get next row start key instead of a skip.
> ------------------------------------------------------------------------------
>
>                 Key: HBASE-12761
>                 URL: https://issues.apache.org/jira/browse/HBASE-12761
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Jurriaan Mous
>            Assignee: Jurriaan Mous
>         Attachments: HBASE-12761-v1.patch, HBASE-12761-v2.patch, HBASE-12761.patch
>
>
> While working on async scanner I had some trouble with the extra RPC calls that happen
to let the Scanner advance 1 row so it skips the last already known row. 
> This RPC call can be avoided by letting the start key be the last row with an appended
0. This saves quite some logic from the scanners and improves performance by saving extra
RPC calls.



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