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https://issues.apache.org/jira/browse/HADOOP-5687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12712089#action_12712089
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Steve Loughran commented on HADOOP-5687:
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Linking to my duplicate bugrep
# my code adds a check for {{FileSystem.getDefaultUri(conf)}} being null, that
could go in on top of what is checked in. It's unlikely, but if you try hard
enough, it happens.
# some tests for this would be lightweight and fast. I will try to write them.
> Hadoop NameNode throws NPE if fs.default.name is the default value
> ------------------------------------------------------------------
>
> Key: HADOOP-5687
> URL: https://issues.apache.org/jira/browse/HADOOP-5687
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Reporter: Philip Zeyliger
> Assignee: Philip Zeyliger
> Priority: Minor
> Fix For: 0.21.0
>
> Attachments: HADOOP-5687-v3.patch, HADOOP-5687-v4.patch,
> HADOOP-5687-v5.patch, HADOOP-5687-v5.patch, HADOOP-5687.patch,
> HADOOP-5687.patch
>
>
> Throwing NPE is confusing; instead, an exception with a useful string
> description could be thrown instead.
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