[MAPREDUCE-617] Streaming should not throw java.lang.RuntimeException and ERROR while displaying help

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.20.2
• Component/s: contrib/streaming
• Assignee: Unassigned
• Reporter: Karam Singh
• Created: 22/Feb/08 13:24
• Updated: 18/Jun/10 10:56
• Resolved: 18/Jun/10 10:56

Description

Run streaming command as -:
bin/hadoop jar contrib/streaming/hadoop-*-streaming.jar -help
it will dislay following -:
ERROR streaming.StreamJob: Missing required option -input
Usage: $HADOOP_HOME/bin/hadoop [--config dir] jar \
$HADOOP_HOME/hadoop-streaming.jar [options]
Options:
-input <path> DFS input file(s) for the Map step
-output <path> DFS output directory for the Reduce step
-mapper <cmd|JavaClassName> The streaming command to run
-combiner <JavaClassName> Combiner has to be a Java class
-reducer <cmd|JavaClassName> The streaming command to run
-file <file> File/dir to be shipped in the Job jar file
-dfs <h>|local Optional. Override DFS configuration
-jt <h>|local Optional. Override JobTracker configuration
-additionalconfspec specfile Optional.
-inputformat TextInputFormat(default)|SequenceFileAsTextInputFormat|JavaClassName Optional.
-outputformat TextOutputFormat(default)|JavaClassName Optional.
-partitioner JavaClassName Optional.
-numReduceTasks <num> Optional.
-inputreader <spec> Optional.
-jobconf <n>=<v> Optional. Add or override a JobConf property
-cmdenv <n>=<v> Optional. Pass env.var to streaming commands
-mapdebug <path> Optional. To run this script when a map task fails
-reducedebug <path> Optional. To run this script when a reduce task fails
-cacheFile fileNameURI
-cacheArchive fileNameURI
-verbose

For more details about these options:
Use $HADOOP_HOME/bin/hadoop jar build/hadoop-streaming.jar -info

Exception in thread "main" java.lang.RuntimeException:
at org.apache.hadoop.streaming.StreamJob.fail(StreamJob.java:542)
at org.apache.hadoop.streaming.StreamJob.exitUsage(StreamJob.java:481)
at org.apache.hadoop.streaming.StreamJob.parseArgv(StreamJob.java:203)
at org.apache.hadoop.streaming.StreamJob.go(StreamJob.java:105)
at org.apache.hadoop.streaming.HadoopStreaming.main(HadoopStreaming.java:33)
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:585)
at org.apache.hadoop.util.RunJar.main(RunJar.java:155)

It should not display execption and -input and error about missin -input option