You can not just use the model output from Ranklib.
I opened this issue few months ago but I never had the right
time/motivation to implement it [1] .
You need to convert it in the Apache Solr LTR expected format.
I remember a script should be available[2]



Alessandro Benedetti
Search Consultant, R&D Software Engineer, Director

On Thu, Feb 15, 2018 at 3:55 PM, Brian Yee <[EMAIL PROTECTED]> wrote: