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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3239) exists() calls logs FileNotFoundException in namenode log
Date Fri, 11 Apr 2008 21:48:04 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12588143#action_12588143
] 

Raghu Angadi commented on HADOOP-3239:
--------------------------------------

You are right. What was changed recently was to throw FileNotFoundException rather than IOException.
 The extra logging is because of DFSClient.exists() using getFileInfo().

I sting think eventually it would be nice to be able to tell RPC not to log user exceptions
or be able to tell which ones to log.

> exists() calls logs FileNotFoundException in namenode log
> ---------------------------------------------------------
>
>                 Key: HADOOP-3239
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3239
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.17.0
>            Reporter: lohit vijayarenu
>
> exists() was modified to invoke getFileStatus() internally. But getFileStatus() throws
FileNotFoundException for files which does not exists and this is logged in RPC$Server for
each exists() call. One way to get rid of these messages is at the Name Node, catch FileNotFoundException
and return null. In this case, RPC would not log it in namenode log. But at the client end
we might have to check for null on all calls of getFileStatus(). Other option at client end
is to construct FileNotFoundException() when getFileInfo() returns null. 

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