ORA-00239: timeout waiting for control file enqueue: held by 'string' for more than string seconds
What triggered the Error:
The specified process waited the maximum allowed time for the control file enqueue.What should we do to fix it:
Restart the blocking instance indicated in the incident trace file or reboot the blocking node.
If this was not sufficient go over to:
Oracle Official Support Knowledge Center
Or maybe those geeks at: StackOverflow Board
Or maybe those geeks at: StackOverflow Board