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From "Nigel Daley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3239) exists() calls logs FileNotFoundException in namenode log
Date Wed, 14 May 2008 00:19:55 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3239?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nigel Daley updated HADOOP-3239:
--------------------------------

     Component/s: dfs
    Hadoop Flags: [Incompatible change, Reviewed]  (was: [Reviewed, Incompatible change])

> 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
>          Components: dfs
>    Affects Versions: 0.17.0
>            Reporter: lohit vijayarenu
>            Assignee: lohit vijayarenu
>             Fix For: 0.17.0
>
>         Attachments: HADOOP-3239-1.patch, HADOOP-3239-2.patch
>
>
> 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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