Georg Sorst created SOLR-12367:
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Summary: In Solr LTR when adding a model referencing a
non-existent feature the error message is very ambiguous
Key: SOLR-12367
URL: https://issues.apache.org/jira/browse/SOLR-12367
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Components: contrib - LTR
Affects Versions: 7.3.1
Reporter: Georg Sorst
When adding a model that references a non-existent feature a very ambiguous
error message is thrown, something like `Model type does not exist
org.apache.solr.ltr.model.{{LinearModel}}`
To reproduce, do not add any features and just add a model, for example by
doing this:
{{curl -XPUT 'http://localhost:8983/solr/gettingstarted/schema/model-store'
--data-binary '}}
{{{}}
{{ "class": "org.apache.solr.ltr.model.LinearModel",}}
{{ "name": "myModel",}}
{{ "features": [\{"name": "whatever" }],}}
{{ "params": \{"weights": {"whatever": 1.0}}}}
{{}' -H 'Content-type:application/json'}}
The resulting error message `Model type does not exist
{{org.apache.solr.ltr.model.LinearModel` is extremely misleading and cost me a
while to figure out the actual cause.}}
A more suitable error message should probably indicate the name of the missing
feature that the model is trying to reference.
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