How to configure to identify to reconnect on a stale connection?

Hi,
I am using oracle App Server 10.1.3.1.0 and oracle BPEL. BPEL uses TOPLINK over all of its Database Adapters. I am also using Oracle Server's connection factory and Data source in order to acquire a connection.
While execution due to some reason, connection pool loses connection with Database. Toplink is not able to resolve the stale connection and tries to connect which is leading to an errenous situation. Exception as:
[r]
Caused by Exception [TOPLINK-4002] (Oracle TopLink - 10g Release 3 (10.1.3.1.0) (Build 061004)): oracle.toplink.exceptions.DatabaseExceptionInternal Exception: java.sql.SQLException: Listener refused the connection with the following error:ORA-12519, TNS:no appropriate service handler foundThe Connection descriptor used by the client was:mrtudev12:1521:xeError Code: 0. at oracle.tip.adapter.db.exceptions.DBResourceException.createEISException(DBResourceException.java:362) at oracle.tip.adapter.db.exceptions.DBResourceException.outboundWriteException(DBResourceException.java:410) at oracle.tip.adapter.db.DBInteraction.executeOutboundWrite(DBInteraction.java:933) at oracle.tip.adapter.db.DBInteraction.execute(DBInteraction.java:211) at oracle.tip.adapter.fw.wsif.jca.WSIFOperation_JCA.executeRequestResponseOperation(WSIFOperation_JCA.java:480) at oracle.tip.adapter.fw.wsif.jca.WSIFOperation_JCA.executeInputOnlyOperation(WSIFOperation_JCA.java:726) at com.collaxa.cube.ws.WSIFInvocationHandler.invoke(WSIFInvocationHandler.java:425) at com.collaxa.cube.ws.WSInvocationManager.invoke2(WSInvocationManager.java:416) at com.collaxa.cube.ws.WSInvocationManager.invoke(WSInvocationManager.java:222) at com.collaxa.cube.engine.ext.wmp.BPELInvokeWMP.__invoke(BPELInvokeWMP.java:736) at com.collaxa.cube.engine.ext.wmp.BPELInvokeWMP.__executeStatements(BPELInvokeWMP.java:371) at com.collaxa.cube.engine.ext.wmp.BPELActivityWMP.perform(BPELActivityWMP.java:195)
[r]
Please suggest that is there is a way that i can configure toplink to acquire a valid managed connection from Pool? or can identify between a stale and live connection?
Thanks

You need to define an ExceptionHandler and handle the code of reconnecting to the db in the ExceptionHandler. The following link should be of some use.
http://www.oracle.com/technology/products/ias/toplink/doc/1013/main/_html/sescfg007.htm

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