We call a WebService and get this exception

Caused by: org.apache.cxf.transport.http.HTTPException: HTTP response '401: Unauthorized ( The server requires authorization to fulfill the request. Access to the Web server is denied. Contact the server administrator.  )' when communicating with https://blabla-blabla.bla.bla.it/Idman_v4

        at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponseInternal(HTTPConduit.java:1563)

        at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponse(HTTPConduit.java:1515)

        at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.close(HTTPConduit.java:1318)

        at org.apache.cxf.transport.AbstractConduit.close(AbstractConduit.java:56)

        at org.apache.cxf.transport.http.HTTPConduit.close(HTTPConduit.java:632)

        at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:62)

        at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:272)

        at org.apache.cxf.endpoint.ClientImpl.doInvoke(ClientImpl.java:570)

        at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:479)

        at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:382)

        at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:335)

        at org.apache.cxf.frontend.ClientProxy.invokeSync(ClientProxy.java:96)

        at org.apache.cxf.jaxws.JaxWsClientProxy.invoke(JaxWsClientProxy.java:136)

        ... 41 more

This works fine for weeks and months. We nothing changed on our wildfly system. After an reload of the system anything works fine after some hours we get the error, so we reload the wildfly and every thing works fine wor a while.

Wy use the same client also on other JBoss EAP 6 and there are no problems, the problem are only on our new wildfly 8.2 system.

We have a widlfy in domain mode with a few nodes.

Some ideas?

Thx Michael