No registered window for:w0

Hi all,
we are using jdev 11.1.2.3 and wls 10.3.5.
We have a problem at production environment we get No registered window for:w0 error a lot of times at the logs but we cannot produce this error at localhost.When this error comes system running very slowly and sometimes users cant login system.Sometimes it recovers itself so system running normally but sometimes we kill weblogic server and restart the server again to solve this problem.I saw at the forum somebody wrote about this error but no answers yet.
Any idea?

There is no advantage when you turn off application module pooling. This is a test scenario you should do with your application on the developers pc. It forces that an application module is returned back to the pool for each and every request. This normally only happens if the server is running low an resources (application modules) and needs to reuse existing application modules to service request. This does not happen on a developer pc as you normally work alone and you always get the same application module.
On a server with multiple uses a a given point in time, depending on some configuration parameters, the application modules are reused. this means the current state is save and then restores for the next user request. However there are some scenarios where you have to save some of the data yourself. For more info check out JDev: Always Test Your App with ApplicationModule Pooling turned off | JDev & ADF Goodies
Making the test will turn up problems with activation/passivation on the developers pc which would normally only turn up later in production.
Your description of the cpu usage is exactly what I would expect in such a case (user request can't be handled as there are no resources left, an am gets cleared but the state of the am can't be reconstructed -> something is missing resulting in your error).
For more info on stree tests read Andrejus Baranovskis's Blog: ADF Performance Marathon - 22 Hours Stress Test
and Andrejus Baranovskis's Blog: Experimenting with ADF BC Application Module Pool Tuning
and https://blogs.oracle.com/onesizedoesntfitall/entry/new_recording_on_using_jmeter
Timo

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