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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3178) Add states for journal synchronization in journal daemon
Date Wed, 04 Apr 2012 21:03:24 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246731#comment-13246731
] 

Todd Lipcon 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?
                
> 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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