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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8253) A corrupted log blocked ReplicationSource
Date Wed, 08 May 2013 00:47:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13651501#comment-13651501
] 

Jean-Daniel Cryans commented on HBASE-8253:
-------------------------------------------

Oh I see what you mean, I thought the problem was somehow caused by replay. So, unless I'm
mistaken, the edit was then written into the next log and durability was ensured? So we just
need to skip over this one? Thanks [~jeason] and sorry for being a bit slow.
                
> A corrupted log blocked ReplicationSource
> -----------------------------------------
>
>                 Key: HBASE-8253
>                 URL: https://issues.apache.org/jira/browse/HBASE-8253
>             Project: HBase
>          Issue Type: Bug
>          Components: Replication
>    Affects Versions: 0.94.6
>            Reporter: Jieshan Bean
>            Assignee: Jieshan Bean
>         Attachments: HBASE-8253-94.patch
>
>
> A writting log got corrupted when we forcely power down one node. Only partial of last
WALEdit was written into that log. And that log was not the last one in replication queue.

> ReplicationSource was blocked under this scenario. A lot of logs like below were printed:
> {noformat}
> 2013-03-30 06:53:48,628 WARN  [regionserver26003-EventThread.replicationSource,1] 1 Got:
 org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:334)
> java.io.EOFException: hdfs://hacluster/hbase/.logs/master11,26003,1364530862620/master11%2C26003%2C1364530862620.1364553936510,
entryStart=40434738, pos=40450048, end=40450048, edit=0
> 	at sun.reflect.GeneratedConstructorAccessor42.newInstance(Unknown Source)
> 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> 	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> 	at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.addFileInfoToException(SequenceFileLogReader.java:295)
> 	at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.next(SequenceFileLogReader.java:240)
> 	at org.apache.hadoop.hbase.replication.regionserver.ReplicationHLogReaderManager.readNextAndSetPosition(ReplicationHLogReaderManager.java:84)
> 	at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.readAllEntriesToReplicateOrNextFile(ReplicationSource.java:412)
> 	at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:330)
> Caused by: java.io.EOFException
> 	at java.io.DataInputStream.readFully(DataInputStream.java:180)
> 	at org.apache.hadoop.io.DataOutputBuffer$Buffer.write(DataOutputBuffer.java:68)
> 	at org.apache.hadoop.io.DataOutputBuffer.write(DataOutputBuffer.java:106)
> 	at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:2282)
> 	at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:2181)
> 	at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:2227)
> 	at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.next(SequenceFileLogReader.java:238)
> 	... 3 more
> ..........	
> 2013-03-30 06:54:38,899 WARN  [regionserver26003-EventThread.replicationSource,1] 1 Got:
 org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:334)
> java.io.EOFException: hdfs://hacluster/hbase/.logs/master11,26003,1364530862620/master11%2C26003%2C1364530862620.1364553936510,
entryStart=40434738, pos=40450048, end=40450048, edit=0
> 	at sun.reflect.GeneratedConstructorAccessor42.newInstance(Unknown Source)
> 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> 	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> 	at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.addFileInfoToException(SequenceFileLogReader.java:295)
> 	at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.next(SequenceFileLogReader.java:240)
> 	at org.apache.hadoop.hbase.replication.regionserver.ReplicationHLogReaderManager.readNextAndSetPosition(ReplicationHLogReaderManager.java:84)
> 	at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.readAllEntriesToReplicateOrNextFile(ReplicationSource.java:412)
> 	at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:330)
> Caused by: java.io.EOFException
> 	at java.io.DataInputStream.readFully(DataInputStream.java:180)
> 	at org.apache.hadoop.io.DataOutputBuffer$Buffer.write(DataOutputBuffer.java:68)
> 	at org.apache.hadoop.io.DataOutputBuffer.write(DataOutputBuffer.java:106)
> 	at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:2282)
> 	at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:2181)
> 	at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:2227)
> 	at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.next(SequenceFileLogReader.java:238)
> 	... 3 more
> ...........	
> {noformat}

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