Harsh J created HDFS-3612:
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Summary: 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
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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