Chris M. Hostetter created SOLR-17047:
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Summary: (SolrCore's) CodecFactory validation ignores schema based
KnnVectorsFormat options on init
Key: SOLR-17047
URL: https://issues.apache.org/jira/browse/SOLR-17047
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Chris M. Hostetter
{{SolrCore}}'s logic for initializing a {{CodecFactory}} includes some
validation that (in psuedo-code) looks like:
{noformat}
if factory is not instanceof SolrCoreAware:
loop over all FieldTypes in schema:
if fieldtype has configured postings format: throw error
if fieldtype has configured docValues format: throw error
{noformat}
..essentially: "If the codec can't do it's own validation of how the fieldtypes
are configured, sanity check what we know can be configured."
But this validation does not include the configurability of
{{KnnVectorsFormat}} options in {{DenseVectorField}} -- these are only
validated by {{SchemaCodecFactory}} _if it's configured_.
Even within {{SchemaCodecFactory}}, these per-fieldtype KNN options are only
validated "on use" -- not on initialization.
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One way or another, attempting to configure {{DenseVectorField}} w/options that
require {{SchemaCodecFactory}} should fail unless {{SchemaCodecFactory}} is in
use.
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