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https://issues.apache.org/jira/browse/MAPREDUCE-5380?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13709463#comment-13709463
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Stephen Chu commented on MAPREDUCE-5380:
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Thanks, [~jlowe]. I'll update a new patch that returns a non-zero exit code for
the no longer supported command case.
I also see that the hadoop and hdfs bin scripts don't return non-zero in the
no-arguments case. My first guess is that no-arguments case should return
non-zero (aside from the help), but I'm not really sure. If you or other people
feel strongly that it should be non-zero, then I can upload that change, too.
> Invalid mapred command should return non-zero exit code
> -------------------------------------------------------
>
> Key: MAPREDUCE-5380
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5380
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 3.0.0, 2.0.4-alpha
> Reporter: Stephen Chu
> Assignee: Stephen Chu
> Attachments: MAPREDUCE-5380.patch
>
>
> Running the mapred bin script with an invalid command returns exit code 0,
> but it should return a non-zero exit code.
> {code}
> [schu@hdfs-snapshots-1 ~]$ hadoop-3.0.0-SNAPSHOT/bin/mapred gibberish
> gibberish - invalid command
> Usage: mapred [--config confdir] COMMAND
> where COMMAND is one of:
> pipes run a Pipes job
> job manipulate MapReduce jobs
> queue get information regarding JobQueues
> classpath prints the class path needed for running
> mapreduce subcommands
> historyserver run job history servers as a standalone daemon
> distcp <srcurl> <desturl> copy file or directories recursively
> archive -archiveName NAME -p <parent path> <src>* <dest> create a hadoop
> archive
> Most commands print help when invoked w/o parameters.
> [schu@hdfs-snapshots-1 ~]$ echo $?
> 0
> [schu@hdfs-snapshots-1 ~]$
> {code}
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