Re: [Wrapper-user] Runtime.exec() problem

[<ama...@ge...>]

Many thanks Gabriel for your response. It was precisely this.

I am still looking into it since I don't quite understand why the second 
app didn't freeze when the first was not run as a service. Also, when 
the exec argument is "cmd /c start startup.bat > null" everything works 
fine now, but using for instance "cmd /c startup.bat > null" has exactly 
the same problem as before. I'm checking out why, frankly I'm not 
familiar with windows commands.

Thanks again for your prompt reply.

Regards.

Adrián.

Gabriel Jurado escribió:
> Hello Adrian, 
> I had a similar problem, make sure that you are reading or at least discarding the output of your
> "executed" application, like the standard output and the error output of the process.
>
> Regards,
>
> G.J.
>
> --- Adrian Marques <ama...@ge...> escribió:
>
>   
>> Hello everyone,
>>
>> I have a Java application that uses Runtime.exec() to start another .NET
>> app. This works just fine when running my program 'standalone'.
>> The problem arises when I use the wrapper to install my Java app as a
>> service: Runtime.exec() executes ok, the .NET app is launched and it
>> seems to work without issues up to about one and a half / two minutes
>> into execution, where it freezes and is seen as 'not responding' by windows.
>>
>> I have browsed through the mailing lists archives and seen some problems
>> with exec() related to the access to network drives or error dialog
>> messages that are not displayed on screen, but I don't think any of this
>> applies to me. Of course I considered that the problem may be caused by
>> the .NET app running as SYSTEM, but (and I find this quite puzzling)
>> after the freeze if I stop the java service or just plain kill the java
>> process the .NET app resumes normal execution as if nothing had happened
>> and has no more problems.
>>
>> A couple more details:
>>
>> - My java app has no GUI; the .NET one does.
>> - The java service seems to keep running in normal fashion after the
>> .NET app hangs.
>> - (Don't know if this is relevant) The .NET app acts as client to some
>> web services. It invokes them some times without any apparent issues
>> before hanging.
>>
>> If anyone could point me in the right direction where to look regarding
>> this it would be greatly appreciated (I'm quite lost here).
>>
>> Many thanks.
>>
>> Adrián.
>>
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