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Date: Wed, 4 Jan 2012 19:03:40 +0000 (UTC)
From: "Siddharth Seth (Updated) (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
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Subject: [jira] [Updated] (MAPREDUCE-3529) TokenCache does not cache viewfs
 credentials correctly
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     [ https://issues.apache.org/jira/browse/MAPREDUCE-3529?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Siddharth Seth updated MAPREDUCE-3529:
--------------------------------------

    Status: Patch Available  (was: Open)
    
> TokenCache does not cache viewfs credentials correctly
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-3529
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3529
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>            Priority: Critical
>         Attachments: MR3529_v1.txt, MR3529_v2.txt, MR3529_v3.txt, MR3529_v4.txt
>
>
> viewfs returns a list of delegation tokens for the actual namenodes. TokenCache caches these based on the actual service name - subsequent calls to TokenCache end up trying to get a new set of tokens.
> Tasks which happen to access TokenCache fail when using viewfs - since they end up trying to get a new set of tokens even though the tokens are already available.
> {noformat}
> Error: java.io.IOException: Delegation Token can be issued only with kerberos or web authentication
>         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getDelegationToken(FSNamesystem.java:4027)
>         at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getDelegationToken(NameNodeRpcServer.java:281)
>         at sun.reflect.GeneratedMethodAccessor38.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.hadoop.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:365)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1490)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1486)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:396)
>         at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1152)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1484)
>         at org.apache.hadoop.ipc.Client.call(Client.java:1085)
>         at org.apache.hadoop.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:193)
>         at $Proxy8.getDelegationToken(Unknown Source)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:100)
>         at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:65)
>         at $Proxy8.getDelegationToken(Unknown Source)
>         at org.apache.hadoop.hdfs.DFSClient.getDelegationToken(DFSClient.java:456)
>         at org.apache.hadoop.hdfs.DistributedFileSystem.getDelegationToken(DistributedFileSystem.java:812)
>         at org.apache.hadoop.hdfs.DistributedFileSystem.getDelegationTokens(DistributedFileSystem.java:839)
>         at org.apache.hadoop.fs.viewfs.ChRootedFileSystem.getDelegationTokens(ChRootedFileSystem.java:311)
>         at org.apache.hadoop.fs.viewfs.ViewFileSystem.getDelegationTokens(ViewFileSystem.java:490)
>         at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodesInternal(TokenCache.java:144)
>         at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodesInternal(TokenCache.java:91)
>         at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodes(TokenCache.java:84)
> {noformat}
> This will likely require some changes in viewfs/hdfs - will open a Jira with details.

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