[jira] [Created] (MAPREDUCE-6240) Hadoop client displays confusing error message

["Mohammad Kamrul Islam (JIRA)" <ji...@apache.org>]

Mohammad Kamrul Islam created MAPREDUCE-6240:
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             Summary: Hadoop client displays confusing error message
                 Key: MAPREDUCE-6240
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6240
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: client
            Reporter: Mohammad Kamrul Islam
            Assignee: Mohammad Kamrul Islam


Hadoop client often throws exception  with "java.io.IOException: Cannot initialize Cluster. Please check your configuration for mapreduce.framework.name and the correspond server addresses".

This is a misleading and generic message for any cluster initialization problem. It takes a lot of debugging hours to identify the root cause. The correct error message could resolve this problem quickly.

In one such instance, Oozie log showed the following exception  while the root cause was CNF  that Hadoop client didn't return in the exception.

{noformat}
 JA009: Cannot initialize Cluster. Please check your configuration for mapreduce.framework.name and the correspond server addresses.
        at org.apache.oozie.action.ActionExecutor.convertExceptionHelper(ActionExecutor.java:412)
        at org.apache.oozie.action.ActionExecutor.convertException(ActionExecutor.java:392)
        at org.apache.oozie.action.hadoop.JavaActionExecutor.submitLauncher(JavaActionExecutor.java:979)
        at org.apache.oozie.action.hadoop.JavaActionExecutor.start(JavaActionExecutor.java:1134)
        at org.apache.oozie.command.wf.ActionStartXCommand.execute(ActionStartXCommand.java:228)
        at org.apache.oozie.command.wf.ActionStartXCommand.execute(ActionStartXCommand.java:63)
        at org.apache.oozie.command.XCommand.call(XCommand.java:281)
        at org.apache.oozie.service.CallableQueueService$CompositeCallable.call(CallableQueueService.java:323)
        at org.apache.oozie.service.CallableQueueService$CompositeCallable.call(CallableQueueService.java:252)
        at org.apache.oozie.service.CallableQueueService$CallableWrapper.run(CallableQueueService.java:174)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: java.io.IOException: Cannot initialize Cluster. Please check your configuration for mapreduce.framework.name and the correspond server addresses.
        at org.apache.hadoop.mapreduce.Cluster.initialize(Cluster.java:120)
        at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:82)
        at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:75)
        at org.apache.hadoop.mapred.JobClient.init(JobClient.java:470)
        at org.apache.hadoop.mapred.JobClient.<init>(JobClient.java:449)
        at org.apache.oozie.service.HadoopAccessorService$1.run(HadoopAccessorService.java:372)
        at org.apache.oozie.service.HadoopAccessorService$1.run(HadoopAccessorService.java:370)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
        at org.apache.oozie.service.HadoopAccessorService.createJobClient(HadoopAccessorService.java:379)
        at org.apache.oozie.action.hadoop.JavaActionExecutor.createJobClient(JavaActionExecutor.java:1185)
        at org.apache.oozie.action.hadoop.JavaActionExecutor.submitLauncher(JavaActionExecutor.java:927)
 ... 10 more
{noformat}



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