I want to prevent the /update/extract request from adding new fields to the schema.xml like “media_white_point”…
I tried to add the update processor IgnoreFieldUpdateProcessorFactory to the “UpdateRequestProcessorChain” which includes deduplication & signature processors, by writing this:

<processor class="solr.IgnoreFieldUpdateProcessorFactory" />

And didn’t work as it should; since
here they say that

By default, this processor ignores any field name which does not exist according to the schema

I appreciate any help, thanks.