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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 Fri, 01 Aug 2014 22:41:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14083101#comment-14083101
] 

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

FAILURE: Integrated in HBase-0.98-on-Hadoop-1.1 #407 (See [https://builds.apache.org/job/HBase-0.98-on-Hadoop-1.1/407/])
HBASE-11632 Region split needs to clear force split flag at the end of SplitRequest run (Jerry
He) (tedyu: rev f2fef2d39a8c69c56ed4ca9c0a52b86d7eb2d03a)
* hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStore.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CompactSplitThread.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
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SplitRequest.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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