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From "Shweta (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDFS-13833) Failed to choose from local rack (location = /default); the second replica is not found, retry choosing ramdomly
Date Tue, 18 Sep 2018 21:52:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16619770#comment-16619770
] 

Shweta edited comment on HDFS-13833 at 9/18/18 9:51 PM:
--------------------------------------------------------

Uploaded patch with changes based on check style errors above.
[~xiaochen], please review. Thank you.


was (Author: shwetayakkali):
Uploaded patch with changes based on check style warnings above.
[~xiaochen], please review. Thank you.

> Failed to choose from local rack (location = /default); the second replica is not found,
retry choosing ramdomly
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-13833
>                 URL: https://issues.apache.org/jira/browse/HDFS-13833
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Henrique Barros
>            Assignee: Shweta
>            Priority: Critical
>         Attachments: HDFS-13833.001.patch, HDFS-13833.002.patch, HDFS-13833.003.patch,
HDFS-13833.004.patch, HDFS-13833.005.patch
>
>
> I'm having a random problem with blocks replication with Hadoop 2.6.0-cdh5.15.0
> With Cloudera CDH-5.15.0-1.cdh5.15.0.p0.21
>  
> In my case we are getting this error very randomly (after some hours) and with only
one Datanode (for now, we are trying this cloudera cluster for a POC)
> Here is the Log.
> {code:java}
> Choosing random from 1 available nodes on node /default, scope=/default, excludedScope=null,
excludeNodes=[]
> 2:38:20.527 PM	DEBUG	NetworkTopology	
> Choosing random from 0 available nodes on node /default, scope=/default, excludedScope=null,
excludeNodes=[192.168.220.53:50010]
> 2:38:20.527 PM	DEBUG	NetworkTopology	
> chooseRandom returning null
> 2:38:20.527 PM	DEBUG	BlockPlacementPolicy	
> [
> Node /default/192.168.220.53:50010 [
>   Datanode 192.168.220.53:50010 is not chosen since the node is too busy (load: 8 >
0.0).
> 2:38:20.527 PM	DEBUG	NetworkTopology	
> chooseRandom returning 192.168.220.53:50010
> 2:38:20.527 PM	INFO	BlockPlacementPolicy	
> Not enough replicas was chosen. Reason:{NODE_TOO_BUSY=1}
> 2:38:20.527 PM	DEBUG	StateChange	
> closeFile: /mobi.me/development/apps/flink/checkpoints/a5a6806866c1640660924ea1453cbe34/chk-2118/eef8bff6-75a9-43c1-ae93-4b1a9ca31ad9
with 1 blocks is persisted to the file system
> 2:38:20.527 PM	DEBUG	StateChange	
> *BLOCK* NameNode.addBlock: file /mobi.me/development/apps/flink/checkpoints/a5a6806866c1640660924ea1453cbe34/chk-2118/1cfe900d-6f45-4b55-baaa-73c02ace2660
fileId=129628869 for DFSClient_NONMAPREDUCE_467616914_65
> 2:38:20.527 PM	DEBUG	BlockPlacementPolicy	
> Failed to choose from local rack (location = /default); the second replica is not found,
retry choosing ramdomly
> org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy$NotEnoughReplicasException:

> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault.chooseRandom(BlockPlacementPolicyDefault.java:784)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault.chooseRandom(BlockPlacementPolicyDefault.java:694)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault.chooseLocalRack(BlockPlacementPolicyDefault.java:601)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault.chooseLocalStorage(BlockPlacementPolicyDefault.java:561)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault.chooseTargetInOrder(BlockPlacementPolicyDefault.java:464)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault.chooseTarget(BlockPlacementPolicyDefault.java:395)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault.chooseTarget(BlockPlacementPolicyDefault.java:270)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault.chooseTarget(BlockPlacementPolicyDefault.java:142)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault.chooseTarget(BlockPlacementPolicyDefault.java:158)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1715)
> 	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3505)
> 	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:694)
> 	at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.addBlock(AuthorizationProviderProxyClientProtocol.java:219)
> 	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:507)
> 	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
> 	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617)
> 	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073)
> 	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2281)
> 	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2277)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at javax.security.auth.Subject.doAs(Subject.java:422)
> 	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1920)
> 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2275)
> {code}
> This part makes no sense at all:
> {code:java}
> load: 8 > 0.0{code}



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