ORA-12802: parallel query server lost contact with coordinator
Cause : A parallel query server lost contact with the foreground (coordinator) process/thread.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Check your system for anomalies and reissue the statement. If this error persists, contact Oracle Support Services.
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.