You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "Anoop Sam John (JIRA)" <ji...@apache.org> on 2013/03/26 18:05:16 UTC
[jira] [Commented] (HBASE-7871) HBase can be stuck when closing
regions concurrently
[ https://issues.apache.org/jira/browse/HBASE-7871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13614305#comment-13614305 ]
Anoop Sam John commented on HBASE-7871:
---------------------------------------
Thanks [~nkeywal] for testing.
MetricsRegionAggregateSourceImpl#getMetrics() how this is being used?
Only one doubt with me. The concurrent iterating over the TreeSet with a register/deregister can throw ConcurrentModificationException? May be [~eclark] can tell about the usage.
> HBase can be stuck when closing regions concurrently
> -----------------------------------------------------
>
> Key: HBASE-7871
> URL: https://issues.apache.org/jira/browse/HBASE-7871
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.96.0
> Reporter: Nicolas Liochon
> Assignee: Ted Yu
> Priority: Critical
> Fix For: 0.95.0, 0.98.0
>
> Attachments: 7871.patch, 7871-v2.patch, s1.txt, TestStartStop.java
>
>
> The attached test fails ~1% of the the time on 0.96. It seems it does not fail on 0.94.5. It's simple: a table creation and some puts.
> I attach the stack. Logs says nothing it seems.
> The suspicious part is:
> {noformat}
> "RS_CLOSE_REGION-localhost,57575,1361197489166-2" prio=10 tid=0x00007fb0c8775800 nid=0x61ac runnable [0x00007fb09f272000]
> java.lang.Thread.State: RUNNABLE
> at java.util.TreeMap.fixAfterDeletion(TreeMap.java:2193)
> at java.util.TreeMap.deleteEntry(TreeMap.java:2151)
> at java.util.TreeMap.remove(TreeMap.java:585)
> at java.util.TreeSet.remove(TreeSet.java:259)
> at org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSourceImpl.deregister(MetricsRegionAggregateSourceImpl.java:55)
> at org.apache.hadoop.hbase.regionserver.MetricsRegionSourceImpl.close(MetricsRegionSourceImpl.java:86)
> at org.apache.hadoop.hbase.regionserver.MetricsRegion.close(MetricsRegion.java:40)
> at org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1063)
> at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:969)
> - locked <0x00000006944e2558> (a java.lang.Object)
> at org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:146)
> at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:203)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> {noformat}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira