DBConsole Not starting: An instance of Oracle Enterprise Manager Database Control is already running Posted by MOHAMMED ABDUL HAMEED on 4:46 AM

Cause : 

Process did not shutdown cleanly form a previous run.

Workaround :

1) Ensure all dbconsole related processes are not running:

ps ef | grep dbconsole
ps ef| grep emagent
kill -9


2) Start the dbconsole

$ emctl start dbconsole