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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6900) FileSystem#listLocatedStatus should not throw generic RuntimeException to indicate error conditions
Date Mon, 09 Aug 2010 21:35:17 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12896701#action_12896701
] 

Hairong Kuang commented on HADOOP-6900:
---------------------------------------

> Additionally I feel when a directory gets deleted in the middle of iteration, we should
ignore it, or add provision to the iterator to ignore it.

Unfortunately not allowing concurrent modification on the input directories is the semantics
that map/reduce has it now. I do not want to introduce an incompatible change for now.

> FileSystem#listLocatedStatus should not throw generic RuntimeException to indicate error
conditions
> ---------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-6900
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6900
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Suresh Srinivas
>            Assignee: Hairong Kuang
>         Attachments: listFilesIO.patch
>
>
> HDFS-6870 introduced FileSystem#listLocatedStatus(), that returns an Iterator to iterate
through LocatedFileStatus for files under a directory or recursively under a sub-directory.
Iterator currently throws generic RuntimeException to indicate error conditions. API needs
to be changed to throw appropriate exceptions to indicate error conditions.

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