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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11961) Document region state transitions
Date Fri, 12 Sep 2014 23:06:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14132268#comment-14132268
] 

Hadoop QA commented on HBASE-11961:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12668461/hbase-11961.patch
  against trunk revision .
  ATTACHMENT ID: 12668461

    {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 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:red}-1 lineLengths{color}.  The patch introduces the following lines longer than
100:
    +          Internally we maintain a state for each region. The region state is persisted
in META. The state of META
+          region is persisted in ZooKeeper. If a region is in transition, its state could
be shown in the Master web UI.
+             <listitem><para>SPLIT:  Server completed split of a region, notified
master</para></listitem>
+             <listitem><para>SPLITTING_NEW:  New regions to be created when a
server splits a region</para></listitem>
+             <listitem><para>MERGED:  Server completed merge two regions, notified
master</para></listitem>
+             <listitem><para>MERGING_NEW: A new region to be created when a server
merges two regions</para></listitem>
+          A region can transition from one state to another. The following graph shows all
the allowed transitions.
+          In the graph, each node is a state. A node has a color based on the state type
for easy understanding.
+             <listitem><para>Peru: Offline state, a special state that can be
transient (after closed before opening),
+               terminal (regions of disabled tables), or initial (regions of newly created
tables)</para></listitem>

  {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/10864//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/10864//artifact/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/10864//artifact/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/10864//artifact/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/10864//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/10864//artifact/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/10864//artifact/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/10864//artifact/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/10864//artifact/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/10864//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/10864//console

This message is automatically generated.

> Document region state transitions
> ---------------------------------
>
>                 Key: HBASE-11961
>                 URL: https://issues.apache.org/jira/browse/HBASE-11961
>             Project: HBase
>          Issue Type: Task
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: hbase-11961.patch
>
>
> Document the region state transitions in the refguide.



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