Github user weijietong commented on the issue:
https://github.com/apache/drill/pull/904
@vvysotskyi thanks for your patient review . As you pointed out , the
timezone would not take effect when test cases run in parallel. I also tried
the mock strategy. It will also fail in parallel. So I moved out that part of
code to a new class called `TestCastFunctionsSpecTZCases` by specifying the
timezone before the cluster starts up. It would be clear to the codes.---
