Ubuntu 16.04.3, download and untar elasticsearch 5.6.1 from .tgz download fess 14.4.4 zip file, unzip , copy plugin to ES 5.6.1 config elasticsearch and fess as the readme suggested here ...
When trying to upgrade from 2.27.0 to 2.28.0, I noticed a change in validation of boolean query parameters. Taking the example from the README (replacing Chi with default router for simplicity) and ...