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From Hossein Bahrami <>
Subject RE: Multiple apps problem
Date Fri, 13 Jan 2017 08:35:41 GMT
Hi Pat,

I have a Ubuntu machine which PredictionIo (0.9.7-aml) installed on it,
I have two application both based on Universal recommender template.
I trained both of the apps and deployed them on different ports .
Results of the apps were quite normal but the problem which I figured out later is that one
of the apps was predicting items with score zero so I retrained it then scores become normal
numbers but after this action (retraining) the other app start returning empty results, so
I retrained that one and then the first one returned zero score items again .

This is like closed circle and retraining each of apps causes the other app return empty results
or abnormal zero scored results.


From: Pat Ferrel<>
Sent: Thursday, January 12, 2017 5:57 PM
Subject: Re: Multiple apps problem

This forum is to support Apache PIO, and the latest UR runs on it so I advise you upgrade.
Instructions are here on<> or here for Apache PIO:

I don't understand your explanation, there should be one train per PredictionServer, you can't
have one PS and two "engines" or configurations. The 2 engines must be on 2 different ports
if deployed separately.

Can you explain your setup and what you are trying to do?

On Jan 12, 2017, at 7:39 AM, Hossein Bahrami <<>>

Hi everyone,

I have a very strange problem. I have two application running on one predictionio engine,
each time I train one of them the other one's predictions returning zero score items for one
of them and no items at all for the other.

I am using UR algorithm for both of apps

pio version : 0.9.7-aml


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