@spdvnzThere currently is no HDF release that is based off Apache NiFi 1.1.2. The most current HDF release as of this response if HDF 2.1.2.
The HDF 2.1.x versions are all based off Apache NiFi 1.10 plus additional Apache bug fixes. The additional bug fixes included in each of these bug fixes can be found in the release notes for each HDF release.
HDF 2.1.0 release notes
HDF 2.1.1 release notes
HDF 2.1.2 release notes
The documentation for doing an Ambari based upgrade to HDF 2.1.2 can be found here:
HDF 2.1.2 Ambari based upgrade guide
Thank you,
Matt