During the upgrade from 8u152 to 8u162 the following exception has been observed during the processing of WS calls:
        2018-02-09 13:46:58,316 [workerThread-#10] ERROR
        [com.sun.xml.internal.messaging.saaj.soap] SAAJ0543: Entity References are not allowed in SOAP documents
        2018-02-09 13:46:58,336 [workerThread-#10] ERROR
        [] Failed to send SOAP notification to [] due to connection failure java.lang.UnsupportedOperationException: Entity References are not allowed in SOAP documents
        javax.xml.ws.WebServiceException: java.lang.UnsupportedOperationException:
        Entity References are not allowed in SOAP documents
               at com.sun.xml.internal.ws.handler.ClientSOAPHandlerTube.callHandlersOnRequest(ClientSOAPHandlerTube.java:135)