Aborting Session - response (3) by abhishek.jadhav

You can use commands like LIST STATUS,LIST ROLLBACK TABLES.If that session is listed in output of above command then rollback is still in progress. If CPU is not an issue then increase the rollback priority 
If the aborting session is not reported in the output of above mentioned commands then check with GSC. TPA reset with dump will clear those and GSC can investigate why they were in aborting state for so long .
 
~ Abhishek Jadhav