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From "Matt Kusnierz (JIRA)" <>
Subject [jira] [Commented] (IO-480) IOUtils.closeQuietly can throw NullPointerException
Date Mon, 08 Jun 2015 10:33:01 GMT


Matt Kusnierz commented on IO-480:

I have tried to raise this with Oracle through my support companies support contract; and
they appear to be reluctant to fix this in the FilterInputStream. The closeQuietly method
says that it should silently swallow ANY / all exceptions; so I still think that it makes
sense to fix this within IOUtils.

> IOUtils.closeQuietly can throw NullPointerException
> ---------------------------------------------------
>                 Key: IO-480
>                 URL:
>             Project: Commons IO
>          Issue Type: Bug
>          Components: Utilities
>    Affects Versions: 2.4
>            Reporter: Matt Kusnierz
>   Original Estimate: 10m
>  Remaining Estimate: 10m
> The IOUtils#closeQuietly method in its javadoc suggests that ANY exceptions will be ignored.
This is not the case, as the code only catches IOExceptions. As this example stack trace shows,
it is possible for some InputStreams to throw NullPointerExceptions during close:
> java.lang.NullPointerException: null
> 	at ~[na:1.6.0_35]
> 	at$JarURLInputStream.close(
> 	at ~[commons-io-2.1.jar:2.1]
> 	at ~[commons-io-2.1.jar:2.1]
> Close quietly should do as advertised/suggested and catch all Exceptions.

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