Github user evans-ye commented on the issue:
https://github.com/apache/bigtop/pull/370
Aside the code, another thing we need to do is to squash all the commits
into one commit.
See here:
https://cwiki.apache.org/confluence/display/BIGTOP/How+to+Contribute#HowtoContribute-Howtogeneratepatchesbycreatingpullrequests.---
