[jira] [Created] (MAPREDUCE-3529) TokenCache does not cache viewfs credentials correctly

["Siddharth Seth (Created) (JIRA)" <ji...@apache.org>]

TokenCache does not cache viewfs credentials correctly
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                 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


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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