Hi, https://github.com/apache/calcite/pull/1625 fixes concurrency issues with Checkstyle and improves "code style" error messages. if no-one objects within three days, I'll assume lazy consensus and commit it.
You can find more info here: https://lists.apache.org/thread.html/62d8d7b5cdd73c14979bc4beef8472956caadd4a84e9dffa7c4123f1%40%3Cdev.calcite.apache.org%3E Vladimir
