The job of registering with and updating the listener is handled by PMON.
PMON also does cleanup of failed transactions.
The database can only run 1 PMON process so I guess it was too busy doing
At 02:33 AM Saturday, Michael McMullen wrote:
>We got a ORA-00600
: internal error code, arguments:  at 10:15
>a.m as a table was being loaded by insert into select * from; I
>believe the undo tablespace filled up first.
>Two minutes after that the database was no longer registered with
>listener. It wouldn't register until rollback was completed. I'm
>logging a tar but anyone ever seen anything like this?
Hemant K Chitale