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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5700) INode.getPathComponents throws NPE when given a non-absolute path
Date Fri, 29 May 2009 19:12:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12714556#action_12714556

Konstantin Shvachko commented on HADOOP-5700:

No, RuntimeException is an indication of a bug. And replacing one bug by another does not
solve the problem.
I think in addition to what I proposed we should also call {{DFSUtil.isValidName(src)}} for
all methods in {{FSNamesystem}} which take a path name string as a parameter. This is done
correctly in {{startFileInternal()}}, {{renameToInternal()}} and {{mkdirsInternal()}}, but
not in {{getFileInfo()}} or {{getBlockLocations()}}.
I propose to fix this jira as I proposed, if it works of course, which I didn't check. And
create a new one, which would make sure {{DFSUtil.isValidName(src)}} is called everywhere
it should be.

> INode.getPathComponents throws NPE when given a non-absolute path
> -----------------------------------------------------------------
>                 Key: HADOOP-5700
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5700
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>             Fix For: 0.21.0
>         Attachments: HADOOP-5700.txt
> If you pass a path that doesn't start with '/' to INode.getPathComponents, it throws
a NullPointerException. Instead it should throw IllegalArgumentException to make it clear
that absolute paths are required in this code.
> The attached patch fixes this, clarifies, the javadoc, and adds a test case.

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