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From "Tsz Wo (Nicholas), SZE (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3178) Add states for journal synchronization in journal daemon
Date Thu, 05 Apr 2012 01:09:18 GMT

    [ 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:
----------------------------------------------

> 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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