Solr DataImportHandler CachedSqlEntityProcessor ClassCastException

Question

I am using Solr 4.6.0 and trying to import my data using CachedSqlEntityProcessor, but somehow I end up getting a ClassCastException.

Answer 1

I dont think there is something wrong with your dataimporthandler configuration, I had rather check that your database types match your corresponding sold field type

Something like a database type resulting in a java.lang.Integer is passed to a solr field based on java.lang.String

OUPS, I might have got it wrong, is your uniqueKey field for SOLR still "id"? you've set in your schema this field as being an integer, which is a bad idea.

http://wiki.apache.org/solr/SchemaXml#The_Unique_Key_Field

"Note that if you have enabled the QueryElevationComponent in solrconfig.xml it requires the schema to have a uniqueKey of type StrField. It cannot be, for example, an int field."