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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-8215) Removing existing .regioninfo in writeRegioninfoOnFilesystem
Date Thu, 28 Mar 2013 18:45:21 GMT
Jimmy Xiang created HBASE-8215:
----------------------------------

             Summary: 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


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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