Github user ijokarumawak commented on the issue:
https://github.com/apache/nifi/pull/3182
Thanks @pvillard31 for confirming that. I'm +1 and going to merge this.
Please update [Migration
Guidance](https://cwiki.apache.org/confluence/display/NIFI/Migration+Guidance)
to note about this behavioral change. A section title like "Migrating from
1.x.x to 1.9.0 (under development, not released yet, subject to be changed)"
would be nice.---
