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Posted to user@uima.apache.org by Olivier Terrier <ol...@temis.com> on 2007/05/11 12:48:41 UTC

Is the Vinci layer thread safe ?

Hi

We use Vinci deployed annotators to load balance our annotation processing on several machines.
Our machines are all multi CPUs machines and N instances of the same Vinci service are launched on each machine.
Sometimes (not systematic) one of the Vinci service fails with a SAXException raised in the CASTransportable.toStream() method.
I have examined the code of the Vinci layer and I wonder if the VinciClient code that is used is really tread safe.
I have noticed that a PooledVinciClient exists and that all its send/receice/sendAndReceive methods are explicitely claimed to be tread-safe in their comment header.
Is this PooledVinciClient used in UIMA when a Vinci service is instancied ?

Thanks

Olivier Terrier

Re: Is the Vinci layer thread safe ?

Posted by Jaroslaw Cwiklik <cw...@us.ibm.com>.
CPM code doesn't use PooledVinciClient. All Vinci proxies in the CPM are 
instances of VinciClient. Each instance is used by one thread at a time. 
All proxies are pooled internally and an instance is checked out, used and 
placed back in the pool. 


++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Jerry Cwiklik
 UIMA Extensions
 IBM T.J.  Watson Research Center
 Hawtorne, NY, 10532
 Tel: 914-784-7665,  T/L: 863-7665
 Email: cwiklik@us.ibm.com




Marshall Schor <ms...@schor.com> 
05/12/2007 05:10 PM
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Re: Is the Vinci layer thread safe ?






Olivier Terrier wrote:
> Hi
>
> We use Vinci deployed annotators to load balance our annotation 
processing on several machines.
> Our machines are all multi CPUs machines and N instances of the same 
Vinci service are launched on each machine.
> Sometimes (not systematic) one of the Vinci service fails with a 
SAXException raised in the CASTransportable.toStream() method.
> I have examined the code of the Vinci layer and I wonder if the 
VinciClient code that is used is really tread safe.
> I have noticed that a PooledVinciClient exists and that all its 
send/receice/sendAndReceive methods are explicitely claimed to be 
tread-safe in their comment header.
> Is this PooledVinciClient used in UIMA when a Vinci service is 
instancied ?
>
> Thanks
>
> Olivier Terrier
> 
I've asked Jerry C. to take a look at this. -Marshall

Re: Is the Vinci layer thread safe ?

Posted by Marshall Schor <ms...@schor.com>.
Olivier Terrier wrote:
> Hi
>
> We use Vinci deployed annotators to load balance our annotation processing on several machines.
> Our machines are all multi CPUs machines and N instances of the same Vinci service are launched on each machine.
> Sometimes (not systematic) one of the Vinci service fails with a SAXException raised in the CASTransportable.toStream() method.
> I have examined the code of the Vinci layer and I wonder if the VinciClient code that is used is really tread safe.
> I have noticed that a PooledVinciClient exists and that all its send/receice/sendAndReceive methods are explicitely claimed to be tread-safe in their comment header.
> Is this PooledVinciClient used in UIMA when a Vinci service is instancied ?
>
> Thanks
>
> Olivier Terrier
>   
I've asked Jerry C. to take a look at this. -Marshall