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https://issues.apache.org/jira/browse/MAPREDUCE-6240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14660599#comment-14660599
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Chris Douglas commented on MAPREDUCE-6240:
------------------------------------------
bq. how about refactoring it and removing this class
org.apache.hadoop.io.MultipleIOException
We'd have to audit where it's used. If there could be systems that expect and
handle it, we'd have to deprecate it first, but I think it makes sense to
remove it in trunk. Separate issue, of course.
> 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
> Affects Versions: 2.7.0
> Reporter: Mohammad Kamrul Islam
> Assignee: Gera Shegalov
> Attachments: MAPREDUCE-6240-gera.001.patch,
> MAPREDUCE-6240-gera.001.patch, MAPREDUCE-6240-gera.002.patch,
> MAPREDUCE-6240.003.patch, MAPREDUCE-6240.1.patch
>
>
> 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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