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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-988) saveNamespace can corrupt edits log
Date Thu, 18 Feb 2010 21:11:27 GMT
saveNamespace can corrupt edits log
-----------------------------------

                 Key: HDFS-988
                 URL: https://issues.apache.org/jira/browse/HDFS-988
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
            Reporter: dhruba borthakur


The adminstrator puts the namenode is safemode and then issues the savenamespace command.
This can corrupt the edits log. The problem is that  when the NN enters safemode, there could
still be pending logSycs occuring from other threads. Now, the saveNamespace command, when
executed, would save a edits log with partial writes. I have seen this happen on 0.20.

https://issues.apache.org/jira/browse/HDFS-909?focusedCommentId=12828853&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12828853

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