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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14968) ConcurrentModificationException in region close resulting in the region staying in closing state
Date Thu, 04 Aug 2016 08:36:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15407417#comment-15407417
] 

Hudson commented on HBASE-14968:
--------------------------------

FAILURE: Integrated in HBase-1.1-JDK8 #1846 (See [https://builds.apache.org/job/HBase-1.1-JDK8/1846/])
HBASE-16350 Undo server abort from HBASE-14968 (enis: rev 5db0f8fb94446e7dce362da5a1843c2b1c6ef0ec)
* hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java


> ConcurrentModificationException in region close resulting in the region staying in closing
state
> ------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-14968
>                 URL: https://issues.apache.org/jira/browse/HBASE-14968
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment, regionserver
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>             Fix For: 2.0.0, 1.2.0, 1.3.0, 1.0.3, 1.1.3, 0.98.17
>
>         Attachments: hbase-14968_v1.patch
>
>
> We have seen this in our tests. The region gets closed, but the region close handler
gets an unexpected exception causing the region to stay in closing state until RS is restarted.

> The Phoenix and security coprocessors were loaded in that region. Here is the stack trace:

> {code}
> java.util.ConcurrentModificationException
> 	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
> 	at java.util.ArrayList$Itr.next(ArrayList.java:851)
> 	at org.apache.hadoop.hbase.coprocessor.CoprocessorHost$Environment.shutdown(CoprocessorHost.java:442)
> 	at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$RegionEnvironment.shutdown(RegionCoprocessorHost.java:155)
> 	at org.apache.hadoop.hbase.coprocessor.CoprocessorHost.shutdown(CoprocessorHost.java:272)
> 	at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$5.postEnvCall(RegionCoprocessorHost.java:496)
> 	at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.execOperation(RegionCoprocessorHost.java:1761)
> 	at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.postClose(RegionCoprocessorHost.java:489)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1502)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1349)
> 	at org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:138)
> 	at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> 	at java.lang.Thread.run(Thread.java:745)
> {code}



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