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Posted to user@uima.apache.org by Josep María Formentí Serra <jm...@aia.es> on 2017/06/09 10:09:00 UTC
How use JCasPool when is exhausted
Hi all,
I have doubts how to control when the pool, JCasPool, is exhausted.
I'm trying something like this:
JCasPool casPool = new JCasPool(100,
segmenter.getAnalysisEngineMetaData());
....
if (cas == null) {
synchronized (casPool) {
{
casPool.wait();
cas = casPool.getJCas();
}
while (cas == null);
}
}
For release just: casPool.releaseJCas(cas);
This is not working for me, because when there are a lot of requests the
application finally is blocked: the pool is full and never is released a
CAS.
Thanks,
JM
Re: How use JCasPool when is exhausted
Posted by Josep María Formentí Serra <jm...@aia.es>.
Oooops, you're right this was the problem, the "do" is missing
Thanks a lot!
2017-06-09 17:17 GMT+02:00 Marshall Schor <ms...@schor.com>:
> Hi,
>
> I'm having some trouble understanding your code snippet.
>
> Perhaps you intended to have a "do { .... } while (cas == null), but it
> appears
> the "do" is missing?
>
> -Marshall
>
>
> On 6/9/2017 6:09 AM, Josep María Formentí Serra wrote:
> > Hi all,
> >
> > I have doubts how to control when the pool, JCasPool, is exhausted.
> >
> > I'm trying something like this:
> >
> > JCasPool casPool = new JCasPool(100,
> > segmenter.getAnalysisEngineMetaData());
> >
> > ....
> >
> > if (cas == null) {
> > synchronized (casPool) {
> > {
> > casPool.wait();
> > cas = casPool.getJCas();
> > }
> > while (cas == null);
> > }
> > }
> >
> > For release just: casPool.releaseJCas(cas);
> >
> > This is not working for me, because when there are a lot of requests the
> > application finally is blocked: the pool is full and never is released a
> > CAS.
> >
> > Thanks,
> > JM
> >
>
>
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Re: How use JCasPool when is exhausted
Posted by Marshall Schor <ms...@schor.com>.
Hi,
I'm having some trouble understanding your code snippet.
Perhaps you intended to have a "do { .... } while (cas == null), but it appears
the "do" is missing?
-Marshall
On 6/9/2017 6:09 AM, Josep María Formentí Serra wrote:
> Hi all,
>
> I have doubts how to control when the pool, JCasPool, is exhausted.
>
> I'm trying something like this:
>
> JCasPool casPool = new JCasPool(100,
> segmenter.getAnalysisEngineMetaData());
>
> ....
>
> if (cas == null) {
> synchronized (casPool) {
> {
> casPool.wait();
> cas = casPool.getJCas();
> }
> while (cas == null);
> }
> }
>
> For release just: casPool.releaseJCas(cas);
>
> This is not working for me, because when there are a lot of requests the
> application finally is blocked: the pool is full and never is released a
> CAS.
>
> Thanks,
> JM
>
Re: How use JCasPool when is exhausted
Posted by Marshall Schor <ms...@schor.com>.
Since you say that CASes are never being released, perhaps you need to trace the
code where you think an acquired cas ought to be being released, and see why
that code path doesn't call the releaseJCas(cas) method?
Also, were there any log / error messages generated?
-Marshall
On 6/9/2017 6:09 AM, Josep María Formentí Serra wrote:
> Hi all,
>
> I have doubts how to control when the pool, JCasPool, is exhausted.
>
> I'm trying something like this:
>
> JCasPool casPool = new JCasPool(100,
> segmenter.getAnalysisEngineMetaData());
>
> ....
>
> if (cas == null) {
> synchronized (casPool) {
> {
> casPool.wait();
> cas = casPool.getJCas();
> }
> while (cas == null);
> }
> }
>
> For release just: casPool.releaseJCas(cas);
>
> This is not working for me, because when there are a lot of requests the
> application finally is blocked: the pool is full and never is released a
> CAS.
>
> Thanks,
> JM
>