[SOLR-10421] solr/contrib/ltr (MinMax|Standard)Normalizer.paramsToMap needs to save float as string

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 6.4, 6.4.1, 6.4.2, 6.5
• Fix Version/s: 6.5.1, 6.6, 7.0
• Assignee: Christine Poerschke
• Reporter: Christine Poerschke
• Created: 04/Apr/17 18:23
• Updated: 08/Jun/19 15:22
• Resolved: 05/Apr/17 12:13

Description

Please see Jianxiong Dong's solr learning_to_rank (normalizer) unmatched argument type issue email on the user mailing list for details on how this bug manifests.

Implementation choice background:

• If the number were to be saved as a number then 4.2 could be considered either as a float or as a double and hence the normalizer classes would need setters for both those possibilities. Equally, 42.0 could be saved as just 42 which then could be either an int or a long and so again setters for both possibilities would be needed. All this complexity is avoided by saving the number as a string. The class has convenience float setters which can be handy for use in tests.

Issue Links

• is related to: SOLR-8542 Integrate Learning to Rank into Solr
• relates to: SOLR-11163 Normalizer fails to restore itself when reload or restart solr cores.