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https://issues.apache.org/jira/browse/EXEC-32?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siegfried Goeschl resolved EXEC-32.
-----------------------------------
Resolution: Fixed
Fix Version/s: 1.0
Applied that patch (my code was already a little bit out-of-sync)
> PumpStreamHandler handles null streams inconsistently
> ------------------------------------------------------
>
> Key: EXEC-32
> URL: https://issues.apache.org/jira/browse/EXEC-32
> Project: Commons Exec
> Issue Type: Bug
> Reporter: Marco Ferrante
> Assignee: Siegfried Goeschl
> Fix For: 1.0
>
> Attachments: DefaultExecutorTest.patch, PumpStreamHandler.patch
>
>
> Passing null arguments in {{PumpStreamHandler}} constructors produces
> hard-to-understand errors.
> E.g.
> {code:java}
> PumpStreamHandler streamHanlder = new PumpStreamHandler(System.out,
> System.err, null);
> {code}
> works correctly, so you can expect that _null_ is a valid argument.
> Instead
> {code:java}
> PumpStreamHandler streamHanlder = new PumpStreamHandler(System.out, null,
> null);
> {code}
> raise a {{NullPointerException}} when {{Executor.execute()}} is invoked.
> Note that exception is raised by the {{start()}} method of
> {{PumpStreamHandler}} .
> Surprisingly
> {code:java}
> PumpStreamHandler streamHanlder = new PumpStreamHandler(null, System.err,
> null);
> {code}
> starts correctly, but fails with a {{NullPointerException}} when the process
> exits.
> In this case, the exception is raised by the {{stop()}} method of
> {{PumpStreamHandler}} .
> I think that the behavior should be more consistent and, if necessary, errors
> must be reported earlier.
> So I suggest two alternatives:
> - if a null argument is passed to a constructor as stdout/stderr an exception
> is raised immediately
> - or, if stdout or stderr are set to null, default {{System.out}} and
> {{System.err}} are used instead.
> At least, the error should be reported before starting process in every case.
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