You should be able to globally override the configuration file used by surefire plugin which executes tests like this:
mvn '-Dlog4j.configuration=[path]/log4j2-on.properties' clean install Bear in mind there is a minor bug in our surefire configuration now: https://issues.apache.org/jira/browse/FLINK-19900 Best, Dawid On 23/10/2020 09:48, Juha Mynttinen wrote: > 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
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