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From "Ivan Kelly (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1926) Remove references to StorageDirectory from JournalManager interface
Date Mon, 16 May 2011 15:19:48 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13034058#comment-13034058
] 

Ivan Kelly commented on HDFS-1926:
----------------------------------

They remove NNStorageListener from FSEditLog. If can't be removed from FSImage without changing
how format is called. I can make that change in this patch as well, but I think it would fit
better in another JIRA.

> Remove references to StorageDirectory from JournalManager interface
> -------------------------------------------------------------------
>
>                 Key: HDFS-1926
>                 URL: https://issues.apache.org/jira/browse/HDFS-1926
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ivan Kelly
>            Assignee: Ivan Kelly
>         Attachments: HDFS-1926-nolistener.diff, HDFS-1926.diff, HDFS-1926.diff
>
>
> The JournalManager interface introduced by HDFS-1799 has a getStorageDirectory method
which is out of place in a generic interface. This JIRA removed that call by refactoring the
error handling for FSEditLog. Each EditLogFileOutputStream is now a NNStorageListener and
listens for error on it's containing StorageDirectory. If an error occurs from FSImage, the
stream will be aborted. If the error occurs in FSEditLog, the stream will be aborted and NNStorage
will be notified that the StorageDirectory is no longer valid.

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