[eclipse-clp-users] OutOfProcessEclipse Error

From: Christian Wirth <tyrion_at_...215...>
Date: Tue, 22 Jun 2010 23:49:58 +0200
I started now using OutOfProcessEclipse to run multiple, idenpendent 
eclipse instances.But i get an error when running complex games:

java.net.SocketException: Connection reset
     at java.net.SocketInputStream.read(SocketInputStream.java:168)
     at java.net.SocketInputStream.read(SocketInputStream.java:182)
     at java.io.DataInputStream.readByte(DataInputStream.java:248)
     at 
com.parctechnologies.eclipse.EXDRInputStream.readTerm(EXDRInputStream.java:97)
     at 
com.parctechnologies.eclipse.RemoteEclipse.readControl(RemoteEclipse.java:1114)
     at 
com.parctechnologies.eclipse.RemoteEclipse.getNextControlTerm(RemoteEclipse.java:1182)
     at 
com.parctechnologies.eclipse.RemoteEclipse.getNextControlSignal(RemoteEclipse.java:796)
     at 
com.parctechnologies.eclipse.EclipseConnectionImpl.waitForEclipse(EclipseConnectionImpl.java:647)
     at 
com.parctechnologies.eclipse.EclipseConnectionImpl.executeRpc(EclipseConnectionImpl.java:381)
     at 
com.parctechnologies.eclipse.EclipseConnectionImpl.rpc(EclipseConnectionImpl.java:366)
     at 
com.parctechnologies.eclipse.OutOfProcessEclipse.rpc(OutOfProcessEclipse.java:367)

The error gets thrown when calling a predicate that get's called alot .. 
also before the error. So it seems somewhat runtime dependent. I already 
tried increasing the stack sizes, but that didn't help. The RAM usage is 
a bit higher then expected but still far below my physical limit.
What could be the reason for this connection reset ? Or is there a way 
to get the reason from eclipse for the reset ?

best regards chistian

Am 22.06.2010 20:04, schrieb Wit Jakuczun:
> You just need to do the same initialization for each prolog engine. 
> This is what I meant by copying. I am not sure if there is a simple 
> way to copy prolog's database.
> Best regards
> -- 
> [ Wit Jakuczun http://www.linkedin.com/in/jakuczunwit  ]
>
>
> 2010/6/22 Christian Wirth <tyrion@...215... 
> <mailto:tyrion@...215...>>
>
>     to clarify it a bit:
>     I compile the prolog source code first, then i load another file
>     via the given prolog program and this triggers some complex
>     calculations (should not be done multiple times) to create new
>     rules. So i would need to copy all rules after those calculations.
>
>     Am 22.06.2010 18:41, schrieb Christian Wirth:
>>     Thx,
>>
>>     i will need to try it out, but seems not too complicated ..
>>     except how do i copy the ruleset ? The ruleset is compiled from a
>>     file and some existing rules, so i don't know every predicate. Is
>>     there a way to just copy all ?
>>
>>     cheers Christian
>>
>>     Am 22.06.2010 18:28, schrieb Wit Jakuczun:
>>>     Dear Christian,
>>>        we have done something similar on 32 processors. You must use
>>>     RemoteEclipse or OutOfProcessEclipse and not EmbeddedEclipse..
>>>     Check this part of documentation:
>>>     http://www.eclipse-clp.org/doc/embedding/embroot048.html for
>>>     more details.
>>>     All you have to do is to send ruleset to each prolog engine
>>>     separately. After this you can call them asynchronously.
>>>     Best regards
>>>     -- 
>>>     [ Wit Jakuczun http://www.linkedin.com/in/jakuczunwit  ]
>>>
>>>
>>>     2010/6/22 Christian Wirth <tyrion@...215...
>>>     <mailto:tyrion@...215...>>
>>>
>>>         My program creates a ruleset on startup .. ofc that can only
>>>         be done singlecore, but after that i repeatetly call a
>>>         predicate that does not modify the ruleset and it is not
>>>         dependant on the parallel calls. So i just want to run every
>>>         predicate call on a new core, without any interaction with
>>>         the other calls.
>>>         But how can i setup the parallel solving ?
>>>
>>>         Am 22.06.2010 18:12, schrieb Wit Jakuczun:
>>>>         2010/6/22 Christian Wirth <tyrion@...215...
>>>>         <mailto:tyrion@...215...>>
>>>>
>>>>             Hi,
>>>>
>>>>             i'm running eclipse CLP on Dualcore and a Quad CPU
>>>>             machine, and would
>>>>             like to use those additional cores/cpus. I'm running
>>>>             eclipse from Java
>>>>             and it's already setup to create multiple parallel
>>>>             threads, but eclipse
>>>>             seems to use only one core anyway ?
>>>>             What do i need to do ?
>>>>
>>>>         I what way would you like to use more than one cpu? If you
>>>>         are asking whether ECLiPSe can solve clp problems using
>>>>         many cpus then the answer is no (according to my
>>>>         knowledge). But you could try to do it by yourself by
>>>>         decomposing your problem and solving each subproblem with
>>>>         separate eclipse solver.
>>>>         Best regards
>>>>         -- 
>>>>         [ Wit Jakuczun http://www.linkedin.com/in/jakuczunwit  ]
>>>
>>>
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>>
>>
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>
>
>     ------------------------------------------------------------------------------
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>     GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the
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Received on Tue Jun 22 2010 - 21:49:57 CEST

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