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https://issues.apache.org/jira/browse/HADOOP-5700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12713679#action_12713679
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Tsz Wo (Nicholas), SZE commented on HADOOP-5700:
------------------------------------------------
Questions:
- How to reproduce the problem? It seems to me that getPathComponents(..) will
return null but not throwing NPE before the patch.
- Did anyone measure the performance impact on the patch? The check
(!path.startsWith("/")) introduced by the patch seems to be redundant since
getPathNames(..) has the same check.
- After the patch, calling getPathComponents(null) will get a NPE but it was
not before the patch. Is it a bug?
> 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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