Gracefull shutdown of a listener

Hi all,

This morning we had the listener shut down at a time when no one should have been working. 

Within the listener log we saw the following:

 12-FEB-2013 02:12:52 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=db.host.com.au)(USER=oracle))(COMMAND=status)(ARGUMENTS=64)(SERVICE=(ADDRESS=(PROTOCOL=TCP)(HOST=10.3.0.4)

(PORT=1526)))(VERSION=153094144)) * status * 0

No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=prod1)))

No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=load3)))

No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=prod2)))

No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=oemrep)))

No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=db.host.com.au)(PORT=1526)))