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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6636) New hadoop command to show NameNode & JobTracker assosiated with client.
Date Wed, 17 Mar 2010 20:57:29 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12846581#action_12846581

Allen Wittenauer commented on HADOOP-6636:

A few random comments:

a) mradmin -report is in 21 or 22

b) Both of these *should* report the NN and JT info and it is kind of funny that no one noticed.

c) A separate, unprivileged command makes sense, especially when you consider something like
HADOOP-5670 .

d) PLEASE don't make the option camelCase.  This is the shell, not Java.  The current camelCase
options drive me batty as it is. :)

> New hadoop command to show NameNode & JobTracker assosiated with client.
> ------------------------------------------------------------------------
>                 Key: HADOOP-6636
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6636
>             Project: Hadoop Common
>          Issue Type: New Feature
>            Reporter: Ravi Phulari
> Currently there is no command to show NameNode and JobTracker associated with client
> Work around used for this is to grep for $HADOOP_CONF_DIR/hdfs-site.xml and mapred-site.xml
> This process is very tedious when more than 1 hadoop clusters are configured. 
> We can add hadoop command option to show which Name node and Job tracker is associated
with client. 
> Command should work something like -- 
> {noformat}
> [user@clientNode ~]$hadoop clusterInfo
> NameNode -  nnNode.foo.corp.com:50070
> JobTracker -  jtNode.foo.corp.com:50030
> {noformat} 
> *dfsadmin -report is restricted to admin only and it shows only datanodes and does not
include NN and JT information*

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