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https://issues.apache.org/jira/browse/HDFS-3178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246916#comment-13246916
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Tsz Wo (Nicholas), SZE commented on HDFS-3178:
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> Hi Nicholas. Could you please add some javadoc to the state enum values
> explaining the purpose of each state, and what the transitions are between
> them? Or augment the design doc for HDFS-3092 with this state machine, and
> reference it from the code?
Sure. I will add javadoc and a state diagram in the design doc.
> Add states for journal synchronization in journal daemon
> --------------------------------------------------------
>
> Key: HDFS-3178
> URL: https://issues.apache.org/jira/browse/HDFS-3178
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, name-node
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: h3178_20120403_svn_mv.patch, h3178_20120404.patch,
> h3178_20120404_svn_mv.patch, svn_mv.sh
>
>
> Journal in a new daemon has to be synchronized to the current transaction.
> It requires new states such as WaitingForRoll, Syncing and Synced.
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