[jira] Commented: (HDFS-1403) add -truncate option to fsck

["dhruba borthakur (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-1403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910003#action_12910003 ] 

dhruba borthakur commented on HDFS-1403:
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This is especially needed when the system supports hflush. A client could issue a hflush, it will persist block locations in the namenode. Then the client could fail even before it could write any bytes to that block. In this case, the last block of the file will be permanently missing. It would be nice to have an option to fsck to delete the last block of a file if it is of size zero and does not have any valid replicas.

> add -truncate option to fsck
> ----------------------------
>
>                 Key: HDFS-1403
>                 URL: https://issues.apache.org/jira/browse/HDFS-1403
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: hdfs client, name-node
>            Reporter: sam rash
>
> When running fsck, it would be useful to be able to tell hdfs to truncate any corrupt file to the last valid position in the latest block.  Then, when running hadoop fsck, an admin can cleanup the filesystem.

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