Github user dawidwys commented on the issue:
https://github.com/apache/flink/pull/6388
In the first place I thought it might make providing the variables a bit
more flexible with `flink-env.sh`. In the end it is just a bash script, but the
longer I think the more convinced I am it was not the right choice. As you said
it does not go well with the other opts, plus we might confuse some users.
I will close this PR and open new one with `env.hadoop.home` tomorrow.---
