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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1046) NPE during compaction/split breaks table
Date Thu, 04 Dec 2008 19:14:44 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-1046:
----------------------------------

    Priority: Blocker  (was: Major)

Marking as blocker. Seems quite serious.

> NPE during compaction/split breaks table
> ----------------------------------------
>
>                 Key: HBASE-1046
>                 URL: https://issues.apache.org/jira/browse/HBASE-1046
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: regionserver
>            Reporter: Andrew Purtell
>            Priority: Blocker
>             Fix For: 0.19.0
>
>
> After reassignment of region split, scanners (mapred tasks) fail:
> org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact region server
10.30.94.49:60020 for region content,c4e518dc579ca98bf97ea13d1f7c80fc,1228407504257, row 'c4e518dc579ca98bf97ea13d1f7c80fc',
but failed after 10 attempts.
> Exceptions:
> java.io.IOException: java.io.IOException: HStoreScanner failed construction
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.(StoreFileScanner.java:70)
> 	at org.apache.hadoop.hbase.regionserver.HStoreScanner.(HStoreScanner.java:84)
> 	at org.apache.hadoop.hbase.regionserver.HStore.getScanner(HStore.java:2113)
> 	at org.apache.hadoop.hbase.regionserver.HRegion$HScanner.(HRegion.java:1847)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1158)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:1521)
> 	at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:634)
> 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:888)
> Caused by: java.io.FileNotFoundException: File does not exist: hdfs://sjdc-atr-dc-1.atr.trendmicro.com:50000/data/hbase/content/1137747785/info/mapfiles/3405780294391796198/data
> 	at org.apache.hadoop.dfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:394)
> 	at org.apache.hadoop.fs.FileSystem.getLength(FileSystem.java:695)
> 	at org.apache.hadoop.io.SequenceFile$Reader.(SequenceFile.java:1420)
> 	at org.apache.hadoop.io.SequenceFile$Reader.(SequenceFile.java:1415)
> 	at org.apache.hadoop.io.MapFile$Reader.createDataFileReader(MapFile.java:301)
> 	at org.apache.hadoop.hbase.io.HBaseMapFile$HBaseReader.createDataFileReader(HBaseMapFile.java:98)
> 	at org.apache.hadoop.io.MapFile$Reader.open(MapFile.java:283)
> 	at org.apache.hadoop.hbase.io.HBaseMapFile$HBaseReader.(HBaseMapFile.java:81)
> 	at org.apache.hadoop.hbase.io.BloomFilterMapFile$Reader.(BloomFilterMapFile.java:66)
> 	at org.apache.hadoop.hbase.io.HalfMapFileReader.(HalfMapFileReader.java:86)
> 	at org.apache.hadoop.hbase.regionserver.HStoreFile.getReader(HStoreFile.java:438)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.openReaders(StoreFileScanner.java:96)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.(StoreFileScanner.java:67)
> 	... 10 more
> According to the master the regions around this row are:
> content,c4580f7292ceb2f6c8d732d935302633,1228328680554  	10.30.94.50:60020  	693011073
	c4580f7292ceb2f6c8d732d935302633  	c4e518dc579ca98bf97ea13d1f7c80fc
> content,c4e518dc579ca98bf97ea13d1f7c80fc,1228407504257 	10.30.94.49:60020 	2031068422
	c4e518dc579ca98bf97ea13d1f7c80fc 	c528c8864e67a3addcb50587586dfe38
> On 10.30.94.49, just before the HStoreScanner exceptions begin:
> 2008-12-04 16:18:30,538 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: MSG_REGION_OPEN:
content,c528c8864e67a3addcb50587586dfe38,1228407504257
> 2008-12-04 16:18:30,539 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: MSG_REGION_OPEN:
content,c4e518dc579ca98bf97ea13d1f7c80fc,1228407504257
> 2008-12-04 16:18:30,539 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: Worker:
MSG_REGION_OPEN: content,c528c8864e67a3addcb50587586dfe38,1228407504257
> 2008-12-04 16:18:30,633 INFO org.apache.hadoop.hbase.regionserver.HRegion: region content,c528c8864e67a3addcb50587586dfe38,1228407504257/1813242175
available
> 2008-12-04 16:18:30,633 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: Worker:
MSG_REGION_OPEN: content,c4e518dc579ca98bf97ea13d1f7c80fc,1228407504257
> 2008-12-04 16:18:30,725 INFO org.apache.hadoop.hbase.regionserver.HRegion: region content,c4e518dc579ca98bf97ea13d1f7c80fc,1228407504257/2031068422
available
> 2008-12-04 16:18:36,659 INFO org.apache.hadoop.hbase.regionserver.HRegion: starting compaction
on region content,c528c8864e67a3addcb50587586dfe38,1228407504257
> 2008-12-04 16:18:36,673 ERROR org.apache.hadoop.hbase.regionserver.CompactSplitThread:
Compaction failed for region content,c528c8864e67a3addcb50587586dfe38,1228407504257
> java.lang.NullPointerException
>         at org.apache.hadoop.hbase.regionserver.HStore.compact(HStore.java:863)
>         at org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:708)
>         at org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:666)
>         at org.apache.hadoop.hbase.regionserver.CompactSplitThread.run(CompactSplitThread.java:87)
> 2008-12-04 16:18:36,689 INFO org.apache.hadoop.hbase.regionserver.HRegion: starting compaction
on region content,c4e518dc579ca98bf97ea13d1f7c80fc,1228407504257
> 2008-12-04 16:18:36,691 ERROR org.apache.hadoop.hbase.regionserver.CompactSplitThread:
Compaction failed for region content,c4e518dc579ca98bf97ea13d1f7c80fc,1228407504257
> java.lang.NullPointerException
>         at org.apache.hadoop.hbase.regionserver.HStore.compact(HStore.java:863)
>         at org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:708)
>         at org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:666)
>         at org.apache.hadoop.hbase.regionserver.CompactSplitThread.run(CompactSplitThread.java:87)
> The previous region server was asked by the master to close it:
> 2008-12-04 07:58:03,525 INFO org.apache.hadoop.hbase.regionserver.HRegionServer:
>  MSG_REGION_CLOSE: content,c4580f7292ceb2f6c8d732d935302633,1228328680554: Overloaded
> 2008-12-04 07:58:03,525 INFO org.apache.hadoop.hbase.regionserver.HRegionServer:
>  Worker: MSG_REGION_CLOSE: content,c4580f7292ceb2f6c8d732d935302633,1228328680554: Overloaded
> 2008-12-04 07:58:03,526 INFO org.apache.hadoop.hbase.regionserver.HRegion: Closed content,c4580f7292ceb2f6c8d732d935302633,1228328680554
> There are no exceptions or other indications of problems with the region or the region
server in the relevant log file.

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