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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1905) Improve the usability of namenode -format
Date Mon, 16 May 2011 19:15:47 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13034209#comment-13034209
] 

Suresh Srinivas commented on HDFS-1905:
---------------------------------------

Comments:
# Namenode#format() returns true if formatting was aborted. Not sure why you changed the return
value from the method. It now does the opposite of what the method javadoc says.
# Please remove reusing the clusterID from an old unrelated image during format. This is unnecessary.
# TestClusterId test will fail with this change. Need changes in that test.

Equivalent change is needed in upgrade command to handle the cluster ID similarly.

> Improve the usability of namenode -format 
> ------------------------------------------
>
>                 Key: HDFS-1905
>                 URL: https://issues.apache.org/jira/browse/HDFS-1905
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.23.0
>            Reporter: Bharath Mundlapudi
>            Assignee: Bharath Mundlapudi
>            Priority: Minor
>             Fix For: 0.23.0
>
>         Attachments: HDFS-1905-1.patch
>
>
> While setting up 0.23 version based cluster, i ran into this issue. When i issue a format
namenode command, which got changed in 23, it should let the user know to how to use this
command in case where complete options were not specified.
> ./hdfs namenode -format
> I get the following error msg, still its not clear what and how user should use this
command.
> 11/05/09 15:36:25 ERROR namenode.NameNode: java.lang.IllegalArgumentException: Format
must be provided with clusterid
> 	at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1483)
> 	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1623)
> 	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1689)
>  
> The usability of this command can be improved.

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