We ran into the same issue (10.2.0.1) and support referred us to this
note (284602.1). The note documents two solutions. We implemented
solution one (rename ons.config), but the problem re-occurred 2 months
later. Then we were told to implement both solutions. This was about
3 weeks ago, so we will wait and see if it occurs again.

Rob Pegram
Duke University

--- Paula Stankus <paulastankus@(protected):

> Help,
>  
>  Our apps servers suddenly were not able to connect to our
> databases. Looking at the services it appeared that there were
> multiple listener processes running on port 1521. We are using
> Oracle listener 10g. It looked as if the parent process was in fact
> the other listener process (original listener process) listening on
> port 1521.
>  
>  Is Oracle somehow spawning additional listener processes?
>  
>  Thanks,
>  Paula
>
>      
> ---------------------------------
> Sneak preview the all-new Yahoo.com. It's not radically different.
> Just radically better.


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