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https://issues.apache.org/jira/browse/YARN-126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13639613#comment-13639613
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Rémy SAISSY commented on YARN-126:
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| Ideally I think we should redo all of the hadoop/hdfs/yarn/mapred commands to
have consistent usage and interfaces but that is a much bigger change.
Yes and the command line options of these tools might be confusing sometimes.
In my daily life I am an IT consultant and when I install/train clients on
Hadoop, they very often encounter two issues when it comes to using the command
line:
- which options are optional for a specific command (-fs in yarn rmadmin?)
- where does some arguments must be specified (-Dmapreduce.map.java.opts when
submiting a job on command line using hadoop jar).
Maybe the redo could be done in an umbrella JIRA with several issues, one per
project?
> yarn rmadmin help message contains reference to hadoop cli and JT
> -----------------------------------------------------------------
>
> Key: YARN-126
> URL: https://issues.apache.org/jira/browse/YARN-126
> Project: Hadoop YARN
> Issue Type: Bug
> Components: client
> Affects Versions: 2.0.3-alpha
> Reporter: Thomas Graves
> Assignee: Rémy SAISSY
> Labels: usability
> Attachments: YARN-126.patch, YARN-126.patch
>
>
> has option to specify a job tracker and the last line for general command
> line syntax had "bin/hadoop command [genericOptions] [commandOptions]"
> ran "yarn rmadmin" to get usage:
> RMAdmin
> Usage: java RMAdmin
> [-refreshQueues]
> [-refreshNodes]
> [-refreshUserToGroupsMappings]
> [-refreshSuperUserGroupsConfiguration]
> [-refreshAdminAcls]
> [-refreshServiceAcl]
> [-help [cmd]]
> Generic options supported are
> -conf <configuration file> specify an application configuration file
> -D <property=value> use value for given property
> -fs <local|namenode:port> specify a namenode
> -jt <local|jobtracker:port> specify a job tracker
> -files <comma separated list of files> specify comma separated files to be
> copied to the map reduce cluster
> -libjars <comma separated list of jars> specify comma separated jar files
> to include in the classpath.
> -archives <comma separated list of archives> specify comma separated
> archives to be unarchived on the compute machines.
> The general command line syntax is
> bin/hadoop command [genericOptions] [commandOptions]
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