Symptom:
dse 3.1.1
Create a solr schema with a date file w/o creating a prior cassandra columnfamily:
<fieldType name="date" class="solr.DateField"/>
<field name="date" type="date" indexed="true"/>
with the following in solrconfig:
<dseTypeMappingVersion>1</dseTypeMappingVersion>
add a document through solr
{'date': '1999-01-01T00:00:00z'}
do a query in solr, you will get the error:
"Unable to parse the date"
A quick look into cassandra's system.schema_column table reviews that the date column actually still has the validator type of utf8
repeating the same procedure <dseTypeMappingVersion>0</dseTypeMappingVersion> in solrconfig does not have the problem.