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From "Andy Isaacson (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3612) Single namenode image directory config warning can be improved
Date Wed, 11 Jul 2012 23:51:34 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andy Isaacson updated HDFS-3612:
--------------------------------

    Attachment: hdfs3612.txt

Improved message:
{code}
Only one dfs.namenode.name.dir directory configured.  Beware of dataloss due to lack of redundant
storage directories!
Only one dfs.namenode.edits.dir directory configured.  Beware of dataloss due to lack of redundant
storage directories!
{code}
Attaching proposed patch.
                
> 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
>         Attachments: hdfs3612.txt
>
>
> 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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