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From "Sanjay Radia (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1111) getCorruptFiles() should give some hint that the list is not complete
Date Tue, 29 Jun 2010 00:56:51 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12883369#action_12883369
] 

Sanjay Radia commented on HDFS-1111:
------------------------------------

Q. Is the RaidNode accessing the functionality via RPC directly or via method that was added
to the Hdfs and DistributedFileSystem.
RaidNode should not be accessing the functionality directly via RPC - rpc's are internal interfaces.
Further if you believe this functionality is useful for adding to Hdfs and DistributedFilesystem
please make the case ( i believe one could make such a case).
When adding special hooks for private or external tools, one should make a case that such
hooks are generally useful.
I realize that a previous Jira has added this functionality; but you were  the author of the
previous jira  and so should be able to make the case.

> 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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