Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
Yes, I see some transactions in dba_2pc_table and rolled back those transactions to release the lock. I am trying to find from which dblink / machine those transactions are distributing. If you have some thing on your finger tips please share.
Try hard to get what you like OR you will be forced to like what you get.