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https://issues.apache.org/jira/browse/YARN-5820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15645042#comment-15645042
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Grant Sohn commented on YARN-5820:
----------------------------------
The latest patch looks incorrect. The <NodeId> is on it's own line and
stylistically should look like option 2.
When you look at all the Hadoop ecosystem command helps, you never split a line
in this manner.
As an example, here is "hadoop fs":
{noformat}
Usage: hadoop fs [generic options]
[-appendToFile <localsrc> ... <dst>]
[-cat [-ignoreCrc] <src> ...]
[-checksum <src> ...]
[-chgrp [-R] GROUP PATH...]
[-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH...]
[-chown [-R] [OWNER][:[GROUP]] PATH...]
[-copyFromLocal [-f] [-p] <localsrc> ... <dst>]
[-copyToLocal [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
[-count [-q] <path> ...]
[-cp [-f] [-p] <src> ... <dst>]
[-createSnapshot <snapshotDir> [<snapshotName>]]
[-deleteSnapshot <snapshotDir> <snapshotName>]
[-df [-h] [<path> ...]]
[-du [-s] [-h] <path> ...]
[-expunge]
[-get [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
[-getfacl [-R] <path>]
[-getmerge [-nl] <src> <localdst>]
[-help [cmd ...]]
[-ls [-d] [-h] [-R] [<path> ...]]
[-mkdir [-p] <path> ...]
[-moveFromLocal <localsrc> ... <dst>]
[-moveToLocal <src> <localdst>]
[-mv <src> ... <dst>]
[-put [-f] [-p] <localsrc> ... <dst>]
[-renameSnapshot <snapshotDir> <oldName> <newName>]
[-rm [-f] [-r|-R] [-skipTrash] <src> ...]
[-rmdir [--ignore-fail-on-non-empty] <dir> ...]
[-setfacl [-R] [{-b|-k} {-m|-x <acl_spec>} <path>]|[--set <acl_spec>
<path>]]
[-setrep [-R] [-w] <rep> <path> ...]
[-stat [format] <path> ...]
[-tail [-f] <file>]
[-test -[defsz] <path>]
[-text [-ignoreCrc] <src> ...]
[-touchz <path> ...]
[-usage [cmd ...]]
{noformat}
> yarn node CLI help should be clearer
> ------------------------------------
>
> Key: YARN-5820
> URL: https://issues.apache.org/jira/browse/YARN-5820
> Project: Hadoop YARN
> Issue Type: Bug
> Components: client
> Affects Versions: 2.6.0
> Reporter: Grant Sohn
> Assignee: Ajith S
> Priority: Trivial
> Attachments: YARN-5820.01.patch, YARN-5820.02.patch,
> YARN-5820.03.patch, YARN-5820.04.patch
>
>
> Current message is:
> {noformat}
> usage: node
> -all Works with -list to list all nodes.
> -list List all running nodes. Supports optional use of
> -states to filter nodes based on node state, all -all
> to list all nodes.
> -states <States> Works with -list to filter nodes based on input
> comma-separated list of node states.
> -status <NodeId> Prints the status report of the node.
> {noformat}
> It should be either this:
> {noformat}
> usage: yarn node [-list [-states <States>|-all] | -status <NodeId>]
> -all Works with -list to list all nodes.
> -list List all running nodes. Supports optional use of
> -states to filter nodes based on node state, all -all
> to list all nodes.
> -states <States> Works with -list to filter nodes based on input
> comma-separated list of node states.
> -status <NodeId> Prints the status report of the node.
> {noformat}
> or that.
> {noformat}
> usage: yarn node -list [-states <States>|-all]
> yarn node -status <NodeId>
> -all Works with -list to list all nodes.
> -list List all running nodes. Supports optional use of
> -states to filter nodes based on node state, all -all
> to list all nodes.
> -states <States> Works with -list to filter nodes based on input
> comma-separated list of node states.
> -status <NodeId> Prints the status report of the node.
> {noformat}
> The latter is the least ambiguous.
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