2737571 - Error " Error Agent at xxx; No valid port configured: xxx/sapj2ee/msgserver/httpport=null: null" While the Diagnostic Agent is not connecting to Solution Manager 7.2

In the SMDAgentApplication log you find the following error :

Jan 3, 2019 7:40:06 AM [Thread[Thread-20,5,main] ] Error Agent at xxx; No valid port configured: xxx/sapj2ee/msgserver/httpport=null: null
[EXCEPTION]
java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:417)
at java.lang.Integer.parseInt(Integer.java:499)
at com.sap.smd.agent.productusage.http.ProductUsageHttpService.getPort(ProductUsageHttpService.java:126)
at com.sap.smd.agent.productusage.http.ProductUsageHttpService.getUsageData(ProductUsageHttpService.java:63)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sap.engine.services.rmi_p4.P4DynamicSkeleton.dispatch(P4DynamicSkeleton.java:241)
at com.sap.engine.services.rmi_p4.DispatchImpl._runInternal(DispatchImpl.java:483)
at com.sap.engine.services.rmi_p4.DispatchImpl._run(DispatchImpl.java:282)
at com.sap.engine.services.rmi_p4.DispatchImpl.run(DispatchImpl.java:759)
at java.lang.Thread.run(Thread.java:763)

• SAP Solution Manager 7.2

 Diagnostic Agent, http, httport, msgsever, port, configured, valid , KBA , SV-SMG-DIA-SRV-AGT , Agent Framework , Problem