Apache CXF not releasing clients

Question

I've discovered my application is heavily leaking memory. After taking heap dumps it appears Apache CXF (2.7.7) seems to be referencing lots of JaxWsServiceConfiguration (14000 in a day).

I'm not sure if I am using it correctly, whether I need to somehow release the client or there is a bug in CXF. Hopefully somebody can point me in the right direction here.

I am using a JaxWsProxyFactoryBean injected into my service methods. The following line is called to create the client proxy (called for every request to the web service):

jaxWsProxyFactoryBean.create();

Eventually the service method finishes but it looks like the factory holds reference to the client proxy and therefore never GCs it.

I thought I could create a single static client and always use this but am a little nervous of this since it is not thread-safe in all circumstances: http://cxf.apache.org/faq.html#FAQ-AreJAX-WSclientproxiesthreadsafe?

Should I be doing this differently?

Answer 1

I use static proxies all the time when I build gateways to consume a web service on behalf of hundreds of concurrent clients. It should be no problem whatsoever as long as the interceptor chain is not modified for a given request, for example modification to the conduit or use of sessions.