Github user greghogan commented on the issue:
https://github.com/apache/flink/pull/3802
@fanzhidongyzby are you using IntelliJ? You'll want to setup
[checkstyle](https://ci.apache.org/projects/flink/flink-docs-release-1.3/internals/ide_setup.html#checkstyle)
which should note the formatting errors that are causing tests to fail. Don't
worry about the strict checkstyle.
We don't yet have a means to import IntelliJ settings, so you'll also need
to configure Editor -> Code Style -> Java -> Imports and set "Class count to
use import with '*'" and "Name count to use static import with '*'" to 999.
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