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From "Kay Kay (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-930) o.a.h.hdfs.server.datanode.DataXceiver - run() - Version mismatch exception - more context to help debugging
Date Wed, 10 Feb 2010 05:04:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12831866#action_12831866
] 

Kay Kay commented on HDFS-930:
------------------------------

Failed 1 test:
---------------

org.apache.hadoop.hdfs.security.TestDelegationToken.testDelegationTokenWithRealUser (from
TestDelegationToken)



Error message for the failure is : 

User: RealUser is not allowed to impersonate proxyUser
Stacktrace

org.apache.hadoop.ipc.RemoteException: User: RealUser is not allowed to impersonate proxyUser
	at org.apache.hadoop.ipc.Client.call(Client.java:860)
	at org.apache.hadoop.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:198)
	at $Proxy7.getProtocolVersion(Unknown Source)
	at org.apache.hadoop.ipc.WritableRpcEngine.getProxy(WritableRpcEngine.java:228)
	at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:220)
	at org.apache.hadoop.hdfs.DFSClient.createRPCNamenode(DFSClient.java:151)
	at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:250)
	at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:217)
	at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:87)
	at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1747)
	at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:69)
	at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:1775)
	at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1763)
	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:193)
	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:101)
	at org.apache.hadoop.hdfs.MiniDFSCluster.getFileSystem(MiniDFSCluster.java:813)
	at org.apache.hadoop.hdfs.security.TestDelegationToken$1.run(TestDelegationToken.java:147)
	at org.apache.hadoop.hdfs.security.TestDelegationToken$1.run(TestDelegationToken.java:145)
	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:650)
	at org.apache.hadoop.hdfs.security.TestDelegationToken.testDelegationTokenWithRealUser(TestDelegationToken.java:144)



> o.a.h.hdfs.server.datanode.DataXceiver - run() - Version mismatch exception - more context
to help debugging
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-930
>                 URL: https://issues.apache.org/jira/browse/HDFS-930
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: documentation
>    Affects Versions: 0.22.0
>            Reporter: Kay Kay
>            Assignee: Kay Kay
>            Priority: Minor
>         Attachments: HADOOP-6519.patch, HDFS-930.patch, HDFS-930.patch
>
>
> add some context information in the IOException during a version mismatch to help debugging.

> (Applicable on the 0.20.x branch ) 

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