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https://issues.apache.org/jira/browse/HDFS-3612?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13408934#comment-13408934
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Harsh J commented on HDFS-3612:
-------------------------------
I also noticed that the same warning is printed twice instead of just once:
{code}
12/07/08 20:00:22 WARN namenode.FSNamesystem: Only one dfs.namenode.name.dir
directory configured , beware data loss!
12/07/08 20:00:22 WARN namenode.FSNamesystem: Only one dfs.namenode.edits.dir
directory configured , beware data loss!
{code}
This should not happen and it should be printed only once. Lets avoid redundant
logs.
> Single namenode image directory config warning can be improved
> --------------------------------------------------------------
>
> Key: HDFS-3612
> URL: https://issues.apache.org/jira/browse/HDFS-3612
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 2.0.0-alpha
> Reporter: Harsh J
> Priority: Trivial
> Labels: newbie
>
> Currently, if you configure the NameNode to run with just one
> dfs.namenode.name.dir directory, it prints:
> {code}
> 12/07/08 20:00:22 WARN namenode.FSNamesystem: Only one dfs.namenode.name.dir
> directory configured , beware data loss!{code}
> We can improve this in a few ways as it is slightly ambiguous:
> # Fix punctuation spacing, there's always a space after a punctuation mark
> but never before one.
> # Perhaps the message is better printed with a reason of why it may cause a
> scare of data loss. For instance, we can print "Detected a single storage
> directory in dfs.namenode.name.dir configuration. Beware of dataloss due to
> lack of redundant storage directories" or so.
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