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https://issues.apache.org/jira/browse/HDFS-11753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16001008#comment-16001008
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Doris Gu commented on HDFS-11753:
---------------------------------

Add some explanation about QA results, welcome suggestions.
1.test4tests
The patch is not that complicated, and can be verified by simple steps as 
follows.
1.1 Add support -h for *hdfs journalnode*, since it only has general options, I 
add a brief statement about journalnode followed the style of secondary 
namenode.
1.2 I use *hdfs journalnode* with different config files, i.e. start 
journalnode several times on one node, I get several journalnode daemons. 
Details will be pasted soon.
2.checkstyle
Very meaningful, plan to make a new patch soon, but I haven't realized the 
relationship with my patch, is there any opinions? 

> Make Some Enhancements about JournalNode Daemon 
> ------------------------------------------------
>
>                 Key: HDFS-11753
>                 URL: https://issues.apache.org/jira/browse/HDFS-11753
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: journal-node
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Doris Gu
>         Attachments: HDFS-11753.001.patch
>
>
> 1.Add support -h. Right now, if I use *hdfs journalnode -h* , I straightly 
> start journalnode daemon. But generally speakingļ¼Œ I just want to look at the 
> usage.
> 2.Add exception catch and termination. If I start journalnode with different 
> directions stored pids, I get servel journalnode daemons that don't work for 
> I config the same port.
> {quote}[hdfs@localhost ~]$ jps
> *10107 JournalNode*
> *46023 JournalNode*
> 57944 NameNode
> 46539 Jps
> 57651 DFSZKFailoverController
> 57909 DataNode
> *57739 JournalNode*
> *45721 JournalNode*{quote}



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