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https://issues.apache.org/jira/browse/HDFS-1905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032763#comment-13032763
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Suresh Srinivas commented on HDFS-1905:
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Sanjay, I think our data files that are in plain text, should not be so, to
avoid people messing with it.
We should add in this jira, to the description of the command, the uniqueness
requirement of cluster ID.
> 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
>
>
> 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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