The OCSPTimeout test introduced in JDK-8179502 had windows that were too tightly bound for some CI infrastructures. This was largely corrected in JDK-8309740, but OCSPTimeout still has occasional failures, but they are much more rare and very difficult to reproduce. They may not even be timing related any longer.
This enhancement seeks to add some more detailed log messages on the cert path validator (client) and SimpleOCSPServer (server) sides to the OCSP test so when the issue does happen again we can hopefully get more information to help diagnose or reproduce the failure.