[MAPREDUCE-3529] TokenCache does not cache viewfs credentials correctly

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.23.0
• Fix Version/s: 0.23.1
• Component/s: mrv2
• Hadoop Flags: Reviewed
• Assignee: Siddharth Seth
• Reporter: Siddharth Seth
• Created: 10/Dec/11 03:46
• Updated: 05/Mar/12 02:49
• Resolved: 04/Jan/12 23:08

Description

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.

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)

This will likely require some changes in viewfs/hdfs - will open a Jira with details.

Issue Links

• blocks: PIG-2392 merge join resutls in ERROR 2176
• is blocked by: HADOOP-7933 Viewfs changes for MAPREDUCE-3529