[MAPREDUCE-4324] JobClient can perhaps set mapreduce.job.credentials.binary rather than expect its presence?

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.22.0, 2.0.0-alpha
• Component/s: mrv1, mrv2, security
• Assignee: Harsh J
• Reporter: Harsh J
• Created: 07/Jun/12 16:25
• Updated: 02/Dec/12 04:55
• Resolved: 02/Dec/12 04:55

Description

HDFS-1007 added in this requirement property "mapreduce.job.credentials.binary", that has lead Oozie to add the following duplicate snippet to all its Job-launching main classes such as the Pig, Hive, MR and Sqoop actions:

if (System.getenv("HADOOP_TOKEN_FILE_LOCATION") != null) {
            jobConf.set("mapreduce.job.credentials.binary", System.getenv("HADOOP_TOKEN_FILE_LOCATION"));
}

Same is required for any client program that launches a job from within a task.

Why can't this simply be set by the JobClient initialization bits itself? If no one imagines it causing issues, I'd like to add this snippet somewhere in JobSubmitter before it requests NN/JT, as otherwise we'd get…

org.apache.hadoop.ipc.RemoteException: 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:5509) 
at org.apache.hadoop.hdfs.server.namenode.NameNode.getDelegationToken(NameNode.java:536) 
at sun.reflect.GeneratedMethodAccessor31.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.RPC$Server.call(RPC.java:557) 
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1434) 
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1430) 
at java.security.AccessController.doPrivileged(Native Method) 
at javax.security.auth.Subject.doAs(Subject.java:396) 
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1157) 
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1428)

at org.apache.hadoop.ipc.Client.call(Client.java:1107) 
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:226) 
at $Proxy6.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:82) 
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59) 
at $Proxy6.getDelegationToken(Unknown Source) 
at org.apache.hadoop.hdfs.DFSClient.getDelegationToken(DFSClient.java:331) 
at org.apache.hadoop.hdfs.DistributedFileSystem.getDelegationToken(DistributedFileSystem.java:605) 
at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodesInternal(TokenCache.java:115) 
at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodes(TokenCache.java:79) 
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:851) 
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:833) 
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:1157) 
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:833) 
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:807) 
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1242) 

… or similar errors when a user submits a job from a task running in a secured cluster.

Let me know your thoughts on this!

Issue Links

• breaks: MAPREDUCE-3727 jobtoken location property in jobconf refers to wrong jobtoken file