WA Agent may stop and not restart. The agent install directory has JIT dump and javacore files.
Agent logs show this:
XX/XX/20XX 00:00:12.345-0400: abort() has been invoked in the JVM
Release : 12.0
The javacore file examination may show the following or similar excerpts
Cause of thread dump : Dump Event "gpf" (00002000) received
The issue is more common with IBM J9 or AdoptOpenJDK JRE.
The following workaround may be used to start the agent;
Note: If the agent still has issues, then download or use OpenJDK or Oracle JRE (check with Oracle for licensing). Users can use any JRE from any vendor as long as it's JRE 8.