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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-8215) Removing existing .regioninfo in writeRegioninfoOnFilesystem
Date Fri, 29 Mar 2013 00:09:17 GMT

     [ https://issues.apache.org/jira/browse/HBASE-8215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jimmy Xiang updated HBASE-8215:
-------------------------------

      Resolution: Fixed
    Hadoop Flags: Reviewed
          Status: Resolved  (was: Patch Available)

Integrated into 0.94.  Thanks Matteo and Stack for the review.

                
> Removing existing .regioninfo in writeRegioninfoOnFilesystem
> ------------------------------------------------------------
>
>                 Key: HBASE-8215
>                 URL: https://issues.apache.org/jira/browse/HBASE-8215
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.94.6
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>            Priority: Minor
>             Fix For: 0.94.7
>
>         Attachments: 0.94-8215.patch
>
>
> If HRegion#writeRegioninfoOnFilesystem:
> {code}
>     if (fs.exists(regioninfoPath) &&
>         fs.getFileStatus(regioninfoPath).getLen() > 0) {
>       return;
>     }
> {code}
> If the file exists and its length is 0, the file should be removed.  This issue has been
fixed in trunk with HBASE-7807.  We need to fix it in 0.94 as well. Otherwise, we will get
this error:
> {noformat}
> 2013-03-27 16:57:27,143 ERROR org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler:
Failed open of region=t1,r4_38,1364392356229.dec30602f4805a3e640871185ae900aa.
> java.io.IOException: Unable to rename hdfs://hbase-6.ent.cloudera.com:17020/hbase/t1/dec30602f4805a3e640871185ae900aa/.tmp/.regioninfo
to hdfs://hbase-6.ent.cloudera.com:17020/hbase/t1/dec30602f4805a3e640871185ae900aa/.regioninfo
> 	at org.apache.hadoop.hbase.regionserver.HRegion.checkRegioninfoOnFilesystem(HRegion.java:639)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:426)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:3308)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:3256)
> 	at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:331)
> 	at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:107)
> 	at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:169)
> 	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}
> And the region can't be opened, so that stuck in transition.

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