ibm mq - Bouncing Out Of Method In IBM Websphere Studio Enterprise Developer - Java Code -

i have call method in class in action dispatcher, goes this:

... casemanagementletter cml = new casemanagementletter(); string content = cml.generatelettersbyclaimantspdf(cids, request, response,     currentuser); ... 

the method opening looks this:

public string generatelettersbyclaimantspdf(list cids, httpservletrequest request, httpservletresponse response, user currentuser) throws exception { hashmap ids = new hashmap(); ... 

immediately after line, code bounces out previous method.

i have check variables , populated, , have checked break points , placed follow code, step-by-step.

so why bouncing out of method this?

edit: message seems consistently appear after being bounced out.

[7/17/13 15:59:59:978 edt] 312f312f sharedpool    j2ca0086w: shareable connection   mcwrapper id 34aa34aa  managed connection  com.ibm.ws.rsadapter.spi.wsrdbmanagedconnectionimpl@32ca32ca   state:state_tran_wrapper_inuse resource jdbc/wpm_datasource used within local transaction containment   boundary.