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https://issues.apache.org/jira/browse/HDFS-11806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16006086#comment-16006086
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Doris Gu commented on HDFS-11806:
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{quote}hdfs@localhost:~/version/hadoop-3.0.0-alpha2/bin$ ./hdfs journalnode -h
2017-05-11 16:30:26,128 INFO server.JournalNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting JournalNode
STARTUP_MSG: user = hdfs
STARTUP_MSG: host = localhost/127.0.0.1
STARTUP_MSG: args = [-h]
STARTUP_MSG: version = 3.0.0-alpha2{quote}
> hdfs journalnode command should support meaningful --help
> ---------------------------------------------------------
>
> Key: HDFS-11806
> URL: https://issues.apache.org/jira/browse/HDFS-11806
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 3.0.0-alpha2
> Reporter: Doris Gu
>
> Most (sub) commands support -help or -h options for detailed help while hdfs
> journalnode does not. What's worse, when you use "hdfs journalnode -h" to get
> some help, journalnode daemon starts straightly.
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