High CPU utilization by AC800M OPC server/Connectivity server communication breaks
I put both problems into the topic as I am not sure which one is the root cause.
Сurrently we are experiencing periodic short-term breaks in communication with one of our connectivity server (for few seconds several times per hour) observed in the form of lost ping packets and Node_down/Node_up events in the RNRP monitor.
Also at the moment of communication breaks we observe a dramatic increase in CPU utlization by AC800M OPC server.
In the log file OPC server reports the following:
I 2017-03-31 12:32:50.620 OPCAE - End of subscription. OPC client Id = 0 . SaveSub not enabled.
I 2017-03-31 12:32:55.766 OPCAE - Start of subscription. OPC client Id = 0 . SaveSub not enabled.
Also in 90% cases along with the Node_down/Node_up events for the Connectivity server we observe Node_down/Node_up events for one of our operator workstations.
RNRP fault tracers shows some strange errors related to the connectivity server (172.16.80.111/22) and the workstation (172.16.80.207/22), note that the area and the node number are mixed up in the error messages:
Errors found in 172.16.5.72
Hosts file update got reply from unknown node=1, area=207, Has address changed ?
Hosts file update got reply from unknown node=1, area=111, Has address changed ?Please advise.
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