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RE: Region server going down when deleting a table from HBase
Anoop,
Following is stack trace
ERROR org.apache.hadoop.hbase.executor.EventHandler: Caught throwable while processing event M_RS_CLOSE_REGIONjava.lang.RuntimeException: org.apache.hadoop.hbase.DroppedSnapshotException: region: TableName,better,1372421736221.55b13dd9eb08790e8e93757910209c21.        at org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:133)        at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:169)        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)        at java.lang.Thread.run(Thread.java:722)Caused by: org.apache.hadoop.hbase.DroppedSnapshotException: region: TableName,better,1372421736221.55b13dd9eb08790e8e93757910209c21.        at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1474)        at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1353)        at org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:905)        at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:845)        at org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:119)        ... 4 moreCaused by: java.io.FileNotFoundException: File does not exist: /hbase/TableName/55b13dd9eb08790e8e93757910209c21/WPA/ba8ae96c466f4559901127ca24378020        at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:1843)        at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.<init>(DFSClient.java:1834)        at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:578)        at org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:154)        at org.apache.hadoop.fs.FilterFileSystem.open(FilterFileSystem.java:108)        at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:427)        at org.apache.hadoop.hbase.io.hfile.HFile.createReaderWithEncoding(HFile.java:547)        at org.apache.hadoop.hbase.regionserver.StoreFile$Reader.<init>(StoreFile.java:1245)        at org.apache.hadoop.hbase.regionserver.StoreFile.open(StoreFile.java:512)        at org.apache.hadoop.hbase.regionserver.StoreFile.createReader(StoreFile.java:602)        at org.apache.hadoop.hbase.regionserver.Store.commitFile(Store.java:791)        at org.apache.hadoop.hbase.regionserver.Store.access$500(Store.java:108)        at org.apache.hadoop.hbase.regionserver.Store$StoreFlusherImpl.commit(Store.java:2256)        at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1455)        ... 8 more
INFO org.apache.hadoop.ipc.HBaseServer: Stopping server on 60020
Thanks,Sandeep.

> Date: Thu, 11 Jul 2013 18:47:17 +0530
> Subject: Re: Region server going down when deleting a table from HBase
> From: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
>
> What is the full trace for DroppedSnapshotException ?  The caused by trace?
>
> -Anoop-
>
> On Thu, Jul 11, 2013 at 6:38 PM, Sandeep L <[EMAIL PROTECTED]>wrote:
>
> > Hi,
> > We are using hbase-0.94.1 with hadoop-1.0.2.
> > Recently couple of time we faced a strange issue while deleting a table.
> > Whenever we are deleting a table from HBase shell using disable and drop
> > command at least one or two region servers are going down suddenly.
> > I observed following error message in region server log:
> > INFO org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED:
> > Unrecoverable exception while closing region
> > REGION_NAMEjava.lang.RuntimeException:
> > org.apache.hadoop.hbase.DroppedSnapshotException: region: REGION_NAME
> > Previously also we used to disable and drop tables, but we never seen this
> > kind of issue.
> >
> > Thanks,Sandeep.