romain.gauthier created UNOMI-690:
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Summary: Control groups dont work
Key: UNOMI-690
URL: https://issues.apache.org/jira/browse/UNOMI-690
Project: Apache Unomi
Issue Type: Bug
Reporter: romain.gauthier
Fix For: unomi-1.6.2, unomi-2.1.0
In short: I think visitors that are not in the control group can fall into it
every time a variant is displayed, which means that if you're not in a control
group, you just have to refresh the page until you fall into it (except if the
traffic allocation for the control group is 0%)
h3. Steps to reproduce
- Create a content personalization with variant A (fallback, no condition) and
variant b (page views > 2)
- Set control group to 25%, save & publish
- Open anonymous browser, refresh, refresh, refresh, refresh - close browser
- Open anonymous browser, refresh, refresh, refresh, refresh - close browser
- Open anonymous browser, refresh, refresh, refresh, refresh - close browser
h3. Observed behavior
After a 5-10 refresh, the visitor will always see the default variant. If you
look in network, you'll see that the visitor is in the control group, always.
It looks like the control group calculation is done for every variant
decisioning and that we dont store the fact that a visitor is NOT in a control
group.
h3. Expected behaviours
- Visitors profiles that are in the control group for the personalization
should stay in the control group - OK
- Visitor profiles that are NOT in the control group for the personalization
should stay out of it - KO
Looking at the class
https://github.com/apache/unomi/blob/master/services/src/main/java/org/apache/unomi/services/impl/personalization/PersonalizationServiceImpl.java
the problem is pretty obvious.
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