: Ok. Figured it out. Thanks for the pointer. The field was of type "RAW" : in Oracle so it was being converted to a java string by DIH with the : behaviour below.
RAW is probably very similar to BLOB... https://wiki.apache.org/solr/DataImportHandlerFaq#Blob_values_in_my_table_are_added_to_the_Solr_document_as_object_strings_like_B.401f23c5 -Hoss
