[Solution] Actually, there was a problem with TLS termination proxy and hawtio couldn't connect via https with jolokia agent that was on a pod with traffic opened through http. The solution was to add this jolokia property (https://hawt.io/docs/configuration.html#_configuring_jolokia_through_system_properties) as well as add your own jolokia-access.xml with the configuration of CORS similar to this https://github.com/jolokia/jolokia/issues/731