Oracle Database Error Code ORA-21500 Description :
internal error code, arguments: [string], [string], [string], [string], [string], [string], [string], [string]
Error Cause:
This is the generic error number for the OCI environment (client-side) internal errors. This indicates that the OCI environment has encountered an exceptional condition.
How to Solve :
Report as a bug – the first argument is the internal error number.