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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1111) getCorruptFiles() should give some hint that the list is not complete
Date Sat, 26 Jun 2010 00:26:52 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12882780#action_12882780
] 

Konstantin Shvachko commented on HDFS-1111:
-------------------------------------------

> If I remember correctly, there is another message
So what exactly will it print under the conditions (of your example) above?

I see that {{getCorruptFiles()}} was introduced in HDFS-729 as a part of fsck changes related
to -list-corruptfiles. And it is not necessary for fsck. Do you agree with that?

RaidNode has not been mentioned before, not here, not in HDFS-729. ClientProtocol is HDFS-private
api according to recently adopted classification. This means that external tools should not
use or depend on it.


> getCorruptFiles() should give some hint that the list is not complete
> ---------------------------------------------------------------------
>
>                 Key: HDFS-1111
>                 URL: https://issues.apache.org/jira/browse/HDFS-1111
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Rodrigo Schmidt
>            Assignee: Rodrigo Schmidt
>         Attachments: HADFS-1111.0.patch
>
>
> If the list of corruptfiles returned by the namenode doesn't say anything if the number
of corrupted files is larger than the call output limit (which means the list is not complete).
There should be a way to hint incompleteness to clients.
> A simple hack would be to add an extra entry to the array returned with the value null.
Clients could interpret this as a sign that there are other corrupt files in the system.
> We should also do some rephrasing of the fsck output to make it more confident when the
list is not complete and less confident when the list is known to be incomplete.

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