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https://issues.apache.org/jira/browse/HADOOP-1859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12525866
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Doug Cutting commented on HADOOP-1859:
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> I think it should throw an IOException.
Hmm. Maybe. I think runtime exceptions are appropriate when folks simply use
APIs incorrectly, whereas IOException are more for unexpected stuff having to
do with external state. This seems more like an ArrayOutOfBounds or an
IllegalArgumentException to me than something that application logic might try
to handle, like an IOException.
> FSInputDataStream.getPos throws null pointer exception when file has been
> closed
> --------------------------------------------------------------------------------
>
> Key: HADOOP-1859
> URL: https://issues.apache.org/jira/browse/HADOOP-1859
> Project: Hadoop
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.14.1
> Reporter: Benjamin Reed
>
> If an FSInputDataStream object has been closed, invoking getPos() will cause
> a NullPointerException. This is because BufferedInputStream.close() sets in
> to null, and Buffer.getPos() does not check for in being null.
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