I noticed on ssllabs.com that when I upgrade from java 8 to java 9 (9.0.4 to be exact) that without changing any other variables I start to get "Session resumption (caching) No (IDs assigned but not accepted)" as a warning.
I also tried explicitly setting the sessionCacheSize (even tho docs say default is 0 which means unlimited size) and that did not help. Anyone else seeing this or know how to get session cache working again on java 9? Thanks! Jesse