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https://issues.apache.org/jira/browse/HADOOP-2842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12588720#action_12588720
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lohit vijayarenu commented on HADOOP-2842:
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bq. 1. Although FSNamesystem.exists deprecated, could you please fix it so it
returns true only when getFileInfo throws a FileNotFoundException?
HADOOP-3239 would change getFileInfo to return null if file not found instead
of throwing FileNotFoundException. Since this is for 0.18 it would be worth
waiting for HADOOP-3239 and then updating your patch.
> NameNode should throw FileNotFoundException for nonexistent files
> -----------------------------------------------------------------
>
> Key: HADOOP-2842
> URL: https://issues.apache.org/jira/browse/HADOOP-2842
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Affects Versions: 0.16.0
> Reporter: Hairong Kuang
> Assignee: Edward J. Yoon
> Fix For: 0.18.0
>
> Attachments: 2842_v01.patch
>
>
> Currently namenode throws an IOException with a "File does not exist" message
> for nonexistent files. It would be better to throw FileNotFound exception. So
> the client does not need to parse the error message to find out the real
> cause of the I/O error.
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