Java Development Tools

Hi all. I write a webservice using oracle ADF Buisiness components.
When I create an appmodule I get this error on working server - java.lang.ClassCastException: oracle.jbo.common.ampool.PoolMgr

I get it not regulary, sometimes it work ok, sometimes shows this error. On integrated server allways works ok, at least I never saw this error.

Here is stack trace

java.lang.ClassCastException: oracle.jbo.common.ampool.PoolMgr
	at oracle.jbo.common.ampool.PoolMgr.getInstance(PoolMgr.java:51)
	at oracle.jbo.client.Configuration.createRootApplicationModule(Configuration.java:1393)
	at oracle.jbo.client.Configuration.createRootApplicationModule(Configuration.java:1370)
	at kz.kklife.osnsws.ws.WsListener.prepareCall(WsListener.java:69)

I create App Module this way

  WsAppModuleImpl      am =
 (WsAppModuleImpl)Configuration.createRootApplicationModule("kz.kklife.osnsws.model.WsAppModule",
                                                            "WsAppModuleLocal");

I've tried shared configuration, enabled and disabled pool in AM Configuration - the same result.
Google says nothing, I cannot find solution. What is the trouble?


PS: Sometimes I got the same error when releasing AM, so I close it this way.

    private void closeCall() {
        try {
            if (am != null)
                Configuration.releaseRootApplicationModule(am, true);
        } catch (Exception e) {
        } finally {
            am = null;
        }

It looks ugly, but I cannot find another solution.

Edited by: Zulkar on 21.02.2012 11:58