Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/3567
We will need at least two: the existing checkstyle for all the other
modules and the new strict style. (We might get away with having one checkstyle
and per-module suppression files that deactivate rules but I think this can
lead to more hassle in the end.)
IntelliJ can be setup to use a custom checkstyle per module. In my setup
all the modules use the default Flink checkstyle, only for flink-streaming-java
uses the new strict style to mirror the maven setup.
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