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From Jaroslaw Cwiklik <uim...@gmail.com>
Subject Re: UimaAS blocks when accessing a queue with multiple clients concurrently
Date Wed, 08 Dec 2010 01:52:35 GMT
I've created a multi-threaded application that uses a
 BaseUIMAAsynchronousEngine_impl  instance per thread. Scaled this up to 100
threads (100 clients). Ran this many times with a single instance of
RoomNumber Annotator service (from uima as examples). No hangs. Can you try
to run your application with a simple UIMA AS service like RoomNumber
Annotator. You can find the deployment descriptor for it in the
UIMA_HOME/examples/deploy/as.Its called Deploy_RoomNumberAnnotator.xml.



On Tue, Dec 7, 2010 at 4:54 PM, Eddie Epstein <eaepstein@gmail.com> wrote:

> 2010/12/7 Dietmar Gräbner <d.graebner@gmail.com>:
> > I wrote a test client creating multiple threads. Each thread
> > instantiates a BaseUIMAAsynchronousEngine_impl and invokes a uima
> > aggregate with the sendAndReceiveCAS() call. When running the program
> > with e.g. 100 Threads the client gets stuck after processing X calls.
>
> FWIW, a similar multithreaded client scenario that has been used with
> no problems is to instantiate a single BaseUIMAAsynchronousEngine_impl
> with big enough casPool and have each thread call sendAndReceiveCAS()
> using the common API object.
>
> Eddie
>

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