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https://issues.apache.org/jira/browse/HADOOP-13933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15776456#comment-15776456
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Surendra Singh Lilhore commented on HADOOP-13933:
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Thanks [~yuanbo] for review..
bq. I'm wondering if we can use "" instead of null so that we can get rid of
some null condition code
We will wait for [~ajisakaa]'s suggestion for this.
I will fix the checkstyle warnings in next patch..
> Add haadmin command to get HA state of all the namenodes
> --------------------------------------------------------
>
> Key: HADOOP-13933
> URL: https://issues.apache.org/jira/browse/HADOOP-13933
> Project: Hadoop Common
> Issue Type: Improvement
> Components: tools
> Affects Versions: 2.7.1
> Reporter: Surendra Singh Lilhore
> Assignee: Surendra Singh Lilhore
> Attachments: HADOOP-13933.002.patch, HDFS-9559.01.patch
>
>
> Currently we have one command to get state of namenode.
> {code}
> ./hdfs haadmin -getServiceState <serviceId>
> {code}
> It will be good to have command which will give state of all the namenodes.
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