[SOLR-16952] solr.DenseVectorField does not work on a collection with more than 1 shards

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 9.0, 9.1, 9.2, 9.1.1, 9.3, 9.2.1, 9.4
• Fix Version/s: 9.5
• Component/s: multicore

Environment

environment check on:
Ubuntu 20.04
java 11 and java 17

• Assignee: Christine Poerschke
• Reporter: Qais Qadri
• Created: 28/Aug/23 10:47
• Updated: 12/Feb/24 19:48
• Resolved: 04/Dec/23 14:55

Description

the field type solr.DenseVectorField introduced in solr 9.0 works well with single core user managed and single shard collection in solr cloud way, but in any multi shard collection it stores data as list of strings instead of list of floats and running query on top of it also fails to provide correct results.

 

attaching screenshot, the field name is vector, which is defined as 
<fieldType name="knn_vector" class="solr.DenseVectorField" vectorDimension="512" similarityFunction="cosine"/>

<field name="vector" type="knn_vector" indexed="true" stored="true"/>

Issue Links

• links to: GitHub Pull Request #2103
• links to: GitHub Pull Request #2107