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From "Yoram Arnon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-384) optionally ignore a bad entry in namenode state when starting up
Date Wed, 18 Jan 2012 21:44:39 GMT

    [ https://issues.apache.org/jira/browse/HDFS-384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13188723#comment-13188723
] 

Yoram Arnon commented on HDFS-384:
----------------------------------

This should not be the default, and the example you give would be the wrong time to use this
option.
The system administrator would need to start the name node manually using this special option,
to ignore errors just this once, at her discretion.

All that said, this issue predates HDFS fsck.
Fsck obviates the need for this feature.

Yoram

                
> optionally ignore a bad entry in namenode state when starting up
> ----------------------------------------------------------------
>
>                 Key: HDFS-384
>                 URL: https://issues.apache.org/jira/browse/HDFS-384
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Yoram Arnon
>            Assignee: Sameer Paranjpye
>
> if the namenode state (fsimage, edits) contains a bad entry, the namenode refused to
start.
> Normally that's a good thing, alerting the administrator that something's corrupted.
> An option to ignore those entries is useful for recovering from such a condition. Anyone
but a hard core developer would be helpless in the face of a corruption like that, and would
prefer to lose a couple of records and be able to run than to be down, or remove the entire
state of dfs.

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