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https://issues.apache.org/jira/browse/HDFS-4458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13567712#comment-13567712
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Binglin Chang commented on HDFS-4458:
-------------------------------------
The standard way to set fs.defaultFS is to use hostname, but in previous
versions setting ip address can also work, so I think it is better to keep the
old behavior.
> start balancer failed with "Failed to create file [/system/balancer.id]" if
> configure IP on fs.defaultFS
> ---------------------------------------------------------------------------------------------------------
>
> Key: HDFS-4458
> URL: https://issues.apache.org/jira/browse/HDFS-4458
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer
> Affects Versions: 2.0.2-alpha
> Reporter: wenwupeng
>
> start balancer failed with "Failed to create file [/system/balancer.id]" if
> configure IP on fs.defaultFS
> Note:
> configure fs.defaultFS with hostname can resolve this issue
> 2013-01-28 01:21:49,550 WARN org.apache.hadoop.hdfs.StateChange: DIR*
> NameSystem.startFile: Failed to create file [/system/balancer.id] for
> [DFSClient_NONMAPREDUCE_413051464_1] on client [10.111.57.222], because this
> file is already being created by [DFSClient_NONMAPREDUCE_-732728704_1] on
> [10.111.57.222]
> 2013-01-28 01:21:49,550 ERROR
> org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException
> as:root (auth:SIMPLE)
> cause:org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException: Failed to
> create file [/system/balancer.id] for [DFSClient_NONMAPREDUCE_413051464_1] on
> client [10.111.57.222], because this file is already being created by
> [DFSClient_NONMAPREDUCE_-732728704_1] on [10.111.57.222]
> 2013-01-28 01:21:49,551 INFO org.apache.hadoop.ipc.Server: IPC Server handler
> 2 on 8020, call org.apache.hadoop.hdfs.protocol.ClientProtocol.create from
> 10.111.57.222:41630: error:
> org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException: Failed to
> create file [/system/balancer.id] for [DFSClient_NONMAPREDUCE_413051464_1] on
> client [10.111.57.222], because this file is already being created by
> [DFSClient_NONMAPREDUCE_-732728704_1] on [10.111.57.222]
> org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException: Failed to
> create file [/system/balancer.id] for [DFSClient_NONMAPREDUCE_413051464_1] on
> client [10.111.57.222], because this file is already being created by
> [DFSClient_NONMAPREDUCE_-732728704_1] on [10.111.57.222]
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.recoverLeaseInternal(FSNamesystem.java:2175)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1965)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInt(FSNamesystem.java:1878)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:1857)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.create(NameNodeRpcServer.java:407)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.create(ClientNamenodeProtocolServerSideTranslatorPB.java:208)
> at
> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:45831)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:454)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:910)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1694)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1690)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:396)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1367)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1688)
> 2013-01-28 01:21:49,567 INFO org.apache.hadoop.hdfs.StateChange: BLOCK*
> NameSystem.allocateBlock: /system/balancer.id.
> BP-986428099-10.111.57.222-1359353997106
> blk_-2102764247427435122_1002{blockUCState=UNDER_CONSTRUCTION,
> primaryNodeIndex=-1,
> replicas=[ReplicaUnderConstruction[10.111.57.223:50010|RBW],
> ReplicaUnderConstruction[10.111.57.225:50010|RBW],
> ReplicaUnderConstruction[10.111.57.224:50010|RBW]]}
> 2013-01-28 01:21:49,865 INFO org.apache.hadoop.hdfs.StateChange: BLOCK*
> addStoredBlock: blockMap updated: 10.111.57.224:50010 is added to
> blk_-2102764247427435122_1002{blockUCState=UNDER_CONSTRUCTION,
> primaryNodeIndex=-1,
> replicas=[ReplicaUnderConstruction[10.111.57.223:50010|RBW],
> ReplicaUnderConstruction[10.111.57.225:50010|RBW],
> ReplicaUnderConstruction[10.111.57.224:50010|RBW]]} size 0
> 2013-01-28 01:21:49,868 INFO org.apache.hadoop.hdfs.StateChange: BLOCK*
> addStoredBlock: blockMap updated: 10.111.57.225:50010 is added to
> blk_-2102764247427435122_1002{blockUCState=UNDER_CONSTRUCTION,
> primaryNodeIndex=-1,
> replicas=[ReplicaUnderConstruction[10.111.57.223:50010|RBW],
> ReplicaUnderConstruction[10.111.57.225:50010|RBW],
> ReplicaUnderConstruction[10.111.57.224:50010|RBW]]} size 0
> 2013-01-28 01:21:49,871 INFO org.apache.hadoop.hdfs.StateChange: BLOCK*
> addStoredBlock: blockMap updated: 10.111.57.223:50010 is added to
> blk_-2102764247427435122_1002{blockUCState=UNDER_CONSTRUCTION,
> primaryNodeIndex=-1,
> replicas=[ReplicaUnderConstruction[10.111.57.223:50010|RBW],
> ReplicaUnderConstruction[10.111.57.225:50010|RBW],
> ReplicaUnderConstruction[10.111.57.224:50010|RBW]]} size 0
> 2013-01-28 01:21:49,874 INFO org.apache.hadoop.hdfs.StateChange: DIR*
> NameSystem.completeFile: file /system/balancer.id is closed by
> DFSClient_NONMAPREDUCE_-732728704_1
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