I recently finished migrating a bunch (100+) AWS Lambdas from JDK 8 to JDK 11 and it was pretty painless - unit testing was spotty at best but there were no iss

I recently finished migrating a bunch (100+) AWS Lambdas from JDK 8 to JDK 11 and it was pretty painless - unit testing was spotty at best but there were no issues. This was hastened by AWS changing the underlying Java 8 runtime to Amazon Linux - it probably would have been fine but I decided that if we were going to test a change, we might as well move to Java 11 and make the full regression test worthwhile.