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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11632) Region split needs to clear force split flag at the end of SplitRequest run
Date Sat, 02 Aug 2014 04:33:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14083359#comment-14083359
] 

Hudson commented on HBASE-11632:
--------------------------------

FAILURE: Integrated in HBase-TRUNK #5364 (See [https://builds.apache.org/job/HBase-TRUNK/5364/])
HBASE-11632 Region split needs to clear force split flag at the end of SplitRequest run (Jerry
He) (tedyu: rev eb79a4358029653817ddf8bee0dde392c3368ecb)
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SplitRequest.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CompactSplitThread.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStore.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java


> Region split needs to clear force split flag at the end of SplitRequest run
> ---------------------------------------------------------------------------
>
>                 Key: HBASE-11632
>                 URL: https://issues.apache.org/jira/browse/HBASE-11632
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.99.0, 0.98.4
>            Reporter: Jerry He
>            Assignee: Jerry He
>            Priority: Minor
>             Fix For: 0.99.0, 0.98.5, 2.0.0
>
>         Attachments: HBASE-11632-master-v2.patch, HBASE-11632-master.patch, HBASE-11632-v2-0.98.patch
>
>
> force split flag is used when a user requests region split and specifies a split key.
> {code}
> region.forceSplit(splitPoint);
> {code}
> We need to clear force split flag at the end of SplitRequest run. If the region split
is successful, this parent region will go away and there is no need to clear this flag.  But
we will have problem when the split is not successful or rejected.  Here is the case:
> 1. User requested region split at rownkey-n.
> 2. We set forceSplit in the region with rownkey-n.
> 3. The split request got rejected because the region had references.
> 4. After a while, there was a system request split for the same region.
> 5. The region would use forceSplit and rownkey-n to split.  What should have happened
is that the region split is done based on system split policy.



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