CXF memory issue dump

HI,

We have a serious issue regarding memory dump in the WS context using CXF APIs, the problem is :
•We deploy the WS in the server
•We run a simple request to invoke a one of their webservices
•We receive a response in the output of SoapUI
•We get the dump from the memory by pid server
•We search for a tag (included in the request), this tag still existing inside the dump memory (for my case this tag contains a sensitive data)

Note that We use JBoss as a Application Server and 1.8 version as JRE.

We make a call of System.gc() at the end and i implement some outinterceptors to destroy object but no way.

Thanks for your helps