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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5012) replica.getGenerationStamp() may be >= recoveryId
Date Mon, 22 Jul 2013 04:40:49 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13714901#comment-13714901
] 

Suresh Srinivas commented on HDFS-5012:
---------------------------------------

I think this is not a dupe of HDFS-3220. That jira is for changing the log to make debugging
easier, right? Lets use this to understand/debug/fix the real issue.
                
> replica.getGenerationStamp() may be >= recoveryId
> -------------------------------------------------
>
>                 Key: HDFS-5012
>                 URL: https://issues.apache.org/jira/browse/HDFS-5012
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.5-alpha
>            Reporter: Ted Yu
>         Attachments: testReplicationQueueFailover.txt
>
>
> The following was first observed by [~jdcryans] in TestReplicationQueueFailover running
against 2.0.5-alpha:
> {code}
> 2013-07-16 17:14:33,340 ERROR [IPC Server handler 7 on 35081] security.UserGroupInformation(1481):
PriviledgedActionException as:ec2-user (auth:SIMPLE) cause:java.io.IOException: THIS IS NOT
SUPPOSED TO HAPPEN: replica.getGenerationStamp() >= recoveryId = 1041, block=blk_4297992342878601848_1041,
replica=FinalizedReplica, blk_4297992342878601848_1041, FINALIZED
>   getNumBytes()     = 794
>   getBytesOnDisk()  = 794
>   getVisibleLength()= 794
>   getVolume()       = /home/ec2-user/jenkins/workspace/HBase-0.95-Hadoop-2/hbase-server/target/test-data/f2763e32-fe49-4988-ac94-eeca82431821/dfscluster_643a635e-4e39-4aa5-974c-25e01db16ff7/dfs/data/data3/current
>   getBlockFile()    = /home/ec2-user/jenkins/workspace/HBase-0.95-Hadoop-2/hbase-server/target/test-data/f2763e32-fe49-4988-ac94-eeca82431821/dfscluster_643a635e-4e39-4aa5-974c-25e01db16ff7/dfs/data/data3/current/BP-1477359609-10.197.55.49-1373994849464/current/finalized/blk_4297992342878601848
>   unlinked          =false
> 2013-07-16 17:14:33,341 WARN  [org.apache.hadoop.hdfs.server.datanode.DataNode$2@64a1fcba]
datanode.DataNode(1894): Failed to obtain replica info for block (=BP-1477359609-10.197.55.49-1373994849464:blk_4297992342878601848_1041)
from datanode (=127.0.0.1:47006)
> java.io.IOException: THIS IS NOT SUPPOSED TO HAPPEN: replica.getGenerationStamp() >=
recoveryId = 1041, block=blk_4297992342878601848_1041, replica=FinalizedReplica, blk_4297992342878601848_1041,
FINALIZED
>   getNumBytes()     = 794
>   getBytesOnDisk()  = 794
>   getVisibleLength()= 794
>   getVolume()       = /home/ec2-user/jenkins/workspace/HBase-0.95-Hadoop-2/hbase-server/target/test-data/f2763e32-fe49-4988-ac94-eeca82431821/dfscluster_643a635e-4e39-4aa5-974c-25e01db16ff7/dfs/data/data3/current
>   getBlockFile()    = /home/ec2-user/jenkins/workspace/HBase-0.95-Hadoop-2/hbase-server/target/test-data/f2763e32-fe49-4988-ac94-eeca82431821/dfscluster_643a635e-4e39-4aa5-974c-25e01db16ff7/dfs/data/data3/current/BP-1477359609-10.197.55.49-1373994849464/current/finalized/blk_4297992342878601848
>   unlinked          =false
> {code}

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