Error retrieving value for key [LUCEE-STORAGE:CLIENT:FF812C48-444D-4A2B-ADDB-1C436146A387:XXXX.COM] from Couchbase cache.

What I meant was have you tried a number higher than 2500? I also mean that I’ve never seen those NPE (null pointer exception) errors on any server before-- neither a client nor my own test machines.