Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/6111
I have often wondered about this as well. There sure are a lot of log lines.
- The state backends themselves should probably log on `debug` level,
otherwise there is a line per operator in the task
- The task itself should still log on info level, so that one has
information to analyze checkpoints from the logs---
