SHUTDOWN: waiting for detached processes 'VKTM' to terminate

 Hi,

We are trying to shutdown database ( 11.2.0.1 )  by command shutdown immediate. But database hang.

Alert log entries are as below:

ALTER DATABASE DISMOUNT
Completed: ALTER DATABASE DISMOUNT
ARCH: Archival disabled due to shutdown: 1089
Shutting down archive processes
Archiving is disabled
Archive process shutdown avoided: 0 active
ARCH: Archival disabled due to shutdown: 1089
Shutting down archive processes
Archiving is disabled
Archive process shutdown avoided: 0 active
Wed Mar 23 13:23:45 2011
SHUTDOWN: waiting for detached processes 'VKTM' to terminate.