ORACLE-ArcSDE Lock request conflicts with an established lock "turn"

There are three specific solutions to these

1. Closing the database connection in most cases can solve the problem, but sometimes the problem persists.

2.

"1. Close all ArcMap and Arccatalog sessions.

"2. Start-run--cmd
"3. Run command ' sdemon-o kill-t all-p sde ' in DOS

3. The killer will work.

If the above steps have been performed and the data is still reported to be locked, then check the lock table under Sqlplus or plsql:
Sql> select * from Sde.state_locks;
Sql> select * from Sde.object_locks;
Sql> select * from Sde.layer_locks;
Sql> select * from Sde.table_locks;
If there are records returned, manually delete the records from these tables

ORACLE-ArcSDE Lock request conflicts with an established lock "turn"