Registry on one of the boxes was going down with "NullPointerExcepetion" as below:
2019-12-17 11:15:56,650Z (11:15) [main] ERROR com.itko.lisa.coordinator.TestRegistryImpl - null java.lang.NullPointerException at com.itko.lisa.dradis.comm.DradisRestStrategy.handleUnnecessaryLog(DradisRestStrategy.java:130) at com.itko.lisa.dradis.comm.DradisRestStrategy.registryDataToDradis(DradisRestStrategy.java:153) at com.itko.lisa.dradis.comm.DradisCommContext.registryDataToDradis(DradisCommContext.java:320) at com.itko.lisa.coordinator.TestRegistryImpl.sendComponentToDradis(TestRegistryImpl.java:3545) at com.itko.lisa.coordinator.TestRegistryImpl.initialize(TestRegistryImpl.java:281) at com.itko.lisa.coordinator.TestRegistryImpl.<init>(TestRegistryImpl.java:239) at com.itko.lisa.coordinator.TestRegistryImpl.main(TestRegistryImpl.java:2163) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.exe4j.runtime.LauncherEngine.launch(Unknown Source) at com.exe4j.runtime.WinLauncher$2.run(Unknown Source)
To start the the Registry we had to stop every component associated with that registry and restart everything.