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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6900) FileSystem#listLocatedStatus should not throw generic RuntimeException to indicate error conditions
Date Wed, 11 Aug 2010 00:00:17 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897088#action_12897088
] 

Suresh Srinivas commented on HADOOP-6900:
-----------------------------------------

+ 1 for the patch.

bq. 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.

Given that this is a new API, I am not sure handling concurrent modification and ignoring
deleted directories is a real backward compatibility issue for mapreduce. Mapreduce folks
can comment about what is more suitable. We can address this issue in a separate jira though.

> 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, listFilesIO1.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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