Some useful metalink notes for ora-03137.
Intermittant Ora-03137, Ora-03106, Ora-03124 When Forking Across Connections (Doc ID 859472.1)
ora-600 [12333] / ora-3137 [12333] Troubleshooting (Doc ID 828123.1)
ORA-03137: TTC Protocol Internal Error : [12333] Using JDBC Driver (Doc ID 752297.1)
Bug 8625762 - ORA-3137 [12333] due to bind data not read from wire (Doc ID 8625762.8)