Different errors like the below appear in the Univiewer Webconsole (WUVC) log intermittently:
They have the following in common: Caused by: com.orsyp.UniverseException: CentralConnection.read
|2024-09-29T03:26:52,235|ERROR|http://<tomcat.server>:8080/univiewer|BackgroundWorker-18|com.orsyp.kmeleon.security.UVCSecurityManagerFactory|Get MD5 security issue, com.orsyp.std.IoConnectionException: CentralConnection.read error
|2024-09-29T04:44:07,916|ERROR|http://<tomcat.server>:8080/univiewer|BackgroundWorker-19|com.orsyp.kmeleon.persistence.UniCentralNetworkConfigurationPersistence|get all nodes issue
java.lang.reflect.UndeclaredThrowableException: null
at com.sun.proxy.$Proxy21.getAllNodes(Unknown Source) ~[?:?]
|2024-10-15T15:18:51,491|ERROR|http://<tomcat.server>:8080/univiewer|BackgroundWorker-44|com.orsyp.kmeleon.environment.ExceptionManager|An error occured on ENVIRONMENT: (node = null environment = null)
com.orsyp.UniverseException: CentralConnection.read error
|2024-10-15T15:18:51,494|ERROR|http://<tomcat.server>:8080/univiewer|BackgroundWorker-44|com.orsyp.kmeleon.guibuilder.controller.ControllerInvocationHandler|null
java.lang.reflect.InvocationTargetException: null
|2024-10-15T15:18:51,495|ERROR|http://<tomcat.server>:8080/univiewer|BackgroundWorker-44|com.orsyp.kmeleon.guibuilder.controller.ControllerInvocationHandler|com.orsyp.UniverseException: CentralConnection.read error
com.orsyp.kmeleon.guibuilder.controller.BussinesFailure: com.orsyp.UniverseException: CentralConnection.read error
The traffic coming back from the UVMS or Tomcat back to DUAS was blocked by an intrusion prevention system (add-on firewall)
Make sure that the firewall doesn't block traffic.
This was observed in an environment using the Univiewer Webconsole, it might happen on the locally installed UVC as well.