NoUsableProxyException - an exception from hell

[Avichay]

Greatings fellow developers,
I am running an ejb application on Websphere4.0 (on an AIX machine) and I keep getting the following exception:
com.ibm.ws.wlm.client.proxy.NoUsableProxyException
at com.ibm.ws.wlm.client.proxy.RoundRobinProxySelector.getNextClone(RoundRobinProxySelector.java:95)
at com.ibm.ws.wlm.client.config.EJSRepositoryClient.pullServerGroupFromAdminProcess(EJSRepositoryClient.java:321)
........
..........

I can't figure out why this happens (basically it happens when I try to retrieve some data from the data base - but sometimes it works and sometimes it throws this ugly exception.

Any help at all will be great,
I will love you for ever
Thanks,
Avichay

 

[fearo]

Hi,

There may be a problem with the WLM process. The Application Server is not getting a valid Proxy Stub array when retreiving information about the Server Group from the AdminServer process.

I would first disassociate one of the Clones from the Model (refer to previous posting for instruction). Then destroy the model and any remaining clones leaving you with a simple Application Server.

Does the EJB now run correctly?

Yes=>Then run through the WLM Model and Clone creation again and re-test
Did re-test run successfully?
No => Then WLM tracing needs to be enabled (we will cross that bridge when we come to it!!!)

No => Post the details of the current error

Regards,

Fearo

 

[Avichay]

Will disabeling the WLM all together to the job too ?
Can I just stop the admin server, comment the line :
com.ibm.ejs.sm.AdminServer.wlm=true
and restart ?
Will that work ?