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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1508) Ability to do savenamespace without being in safemode
Date Thu, 18 Nov 2010 23:15:13 GMT
Ability to do savenamespace without being in safemode
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                 Key: HDFS-1508
                 URL: https://issues.apache.org/jira/browse/HDFS-1508
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: dhruba borthakur
            Assignee: dhruba borthakur


In the current code, the administrator can run savenamespace only after putting the namenode
in safemode. This means that applications that are writing to HDFS encounters errors because
the NN is in safemode. We would like to allow saveNamespace even when the namenode is not
in safemode.

The savenamespace command already acquires the FSNamesystem writelock. There is no need to
require that the namenode is in safemode too.

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