When you upload a pdf to Solr, it populates Solr with
- values extracted by Tika and mapped to Solr fields:
content
andauthor_name
in the schema are filled like this - values given as parameters: literal.fieldxy gets mapped to fieldxy in Solr schema
In your case, your solr schema uses a field id
for uniqueness. Hence the need to specify a literal.id
for each upload. If you create a core with a different ID scheme, be sure to include a literal.idfield
for each upload.