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From Oliver Deakin <oliver.dea...@googlemail.com>
Subject Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
Date Wed, 21 Jun 2006 20:27:06 GMT
Geir Magnusson Jr wrote:
> Oliver Deakin wrote:
>   
>> The example returns once they have fixed it. If you look at the example
>> just before the "Why Runtime.exec() hangs" heading (BadExecJava2.java)
>> you will see a situation that is almost exactly the same as in the test
>> case.
>> i.e. an exec followed by a waitFor(), without any reading of streams.
>> In this case the exec never returns.
>>
>> The later example is how to fix it.
>>     
>
> I don't think so.
>
> When they are saying "the exec never returns", they are meaning that
> from the POV of the programmer, the spawned thing never returns.
>
> That's why you can do
>
> exec()
> do IO
> waitFor()
> done
>
> However, in our case, when I say "exec never returns" I mean "exec()"
> never returns.
>
> so you'd never actually get to "do IO" above, because you are hanging in
> exec().
>
> Big difference, right?
>   

Certainly - do you have a stack trace that gives more info for what each 
of the threads are
doing? Could you attach it to the JIRA if you do please - Ive just tried 
running a cut down
version of the test on my SLES9 machine and it exited fine, so it would 
be useful to have
a trace from your machine to see what's happening.

Thanks,
Oliver

> geir
>
>
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>
>   

-- 
Oliver Deakin
IBM United Kingdom Limited


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