Degraded Scanclass Performance - UaTcpClientAcknowledgeHandler?

[bfuson]

Possible similar issue:

High CPU Usage for Thread

Hey all, Can someone tell me what this thread is? It’s constantly using a very high amount of CPU, if I restart the server it calms down for a week or two and then starts doing it again. I’m guessing it’s something for the UA server? How do I go about figuring out why it’s using so much CPU resources? Thread [ua-netty-event-loop-0] id=153, (RUNNABLE) sun.misc.Unsafe.unpark(Native Method) java.util.concurrent.locks.LockSupport.unpark(LockSupport.java:141) java.util.concurrent.SynchronousQ…

Previous thread covering these peculiar UA servers:

OPC-UA Server Connections and Tag Issues

Disabling the OPC UA server connection does stop the warnings Strangely when re-enabling the connection all the tag values report correctly, but the Bad_ServiceUnsupported messages resume and the values/timestamps no longer update after the initial read. The sequence of UaSubscriptionChangeListener logs: [D] Synchronizing subscriptions… [D] Creating/deleting items on subscription ‘Scanclass ‘Default[default]’’ [D] nodesToAdd.size()=0 [D] nodesToRemove.size()=0 [D] Setting MonitoringMode to R…