You may observe the following log messages in the wasp.log file :
Sep 12 15:06:32:216 INFO [https-jsse-nio-443-exec-20, com.ca.uim.ems.api.CallbackServiceClientInvocationHandler] Unable to resolve typed exception from callback service call.
and this article does not fix the issue:
https://knowledge.broadcom.com/external/article/252854/cpu-on-the-oc-server-being-consumed-by-t.html
UIM 20.4.x
EMS probe
This issue has been identified by product development and resolved in the 23.4 release.