Hey there, I noticed that when building and testing Flink itself, logging seems to be non-existing or very quiet.
I had a look at the logging conf files (such as flink-tests/src/test/resources/log4j2-test.properties) and the pattern seems to be that the logging is turned off in tests. At least it looks like that to me in the conf files and I couldn't find any logs. I understand that excessive logging can cause flooding of build logs, when logging to stderr and this can be a problem in e.g. the CI environment. Is there some other rationale why logging is disabled? It'd be super nice if one could somehow globally enable test logging and log to e.g. rolling log files. Is there such a mechanism? Missing logs can be a problem with testing locally. If you hit such an issue when running the tests locally that the logs would help to fix, there are no logs and you need to enable logging and re-run the tests. This is not great. And if the bug is a "Heisenbug" you might not find the bug on the re-run. Regards, Juha
