[default@ks] create column family Post with column_type = 'Standard' and column_metadata = [{column_name: 'user', validation_class: 'UTF8Type'}, {column_name: 'type', validation_class: 'UTF8Type'}] and comment = 'bla';
java.lang.RuntimeException: org.apache.cassandra.db.marshal.MarshalException: cannot parse 'user' as hex bytes