Not quite sure if this is a Jackson question or a Springboot question, or Jetty:
My microservice became unresponsive in production apparently due to excessive memory usage (telling from OS RSS stat) but no OOM.
I obtained a heap dump via jcmd [pid] GC.heap_dump and later opened it in Eclipse Memory Analyzer Tool (MAT) installed via Eclipse Marketplace.
I'm greeted by this finding:
I think this says Jackson ObjectMapper ate 80% of my heap (395M out of the default 512M size).
What would cause this and how can I prevent it?