OCI RAU keeps crashing with error "Unable to discover destination for request for EJB"

Applies to

Oncommand Insight 7.3.X (OCI)

Remote Acquisition Unit (RAU)

Issue

RAU keeps crashing with error "Unable to discover destination for request for EJB" 

The error in RAU acquisition log (acq.log) is as follows,

020-08-04 11:48:51,629 ERROR [com.onaro.sanscreen.acquisition.framework.mgmt.ServiceManager] Service Manager - Data Source Events Manager reported an error: Failed to listen to acquisition events!

javax.ejb.NoSuchEJBException: EJBCLIENT000079: Unable to discover destination for request for EJB StatelessEJBLocator for "/acq_server/AcquisitionServerSessionBean", view is interface com.netapp.acquisition.aquisitionserverside.interfaces.remote.AcquisitionServerSession, affinity is URI<remote+https://remote_acquisition_unit_server_ip.au:443>

              at org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:592) ~[jboss-ejb-client-4.0.14.Final.jar:4.0.14.Final]

              at com.sun.proxy.$Proxy19.listen(Unknown Source) ~[?:?]

              at sun.reflect.GeneratedMethodAccessor30.invoke(Unknown Source) ~[?:?]

              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_231]

              at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_231]