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RE: 10.2 listener won't start on same port as 9.2 listener

From: <>
Date: Tue, 20 Sep 2005 11:40:36 -0400
Message-ID: <>

No, the key is different. I'm using the exact same listener.ora that I did for the 10.1 instance with the exception of the different ORACLE_HOME. I differentiate the keys by adding the instance name (e.g., KEY = EXTPROCAAA, KEY = EXTPROCBBB, KEY = EXTPROCCCC). I'll speak with the SAs about running netstat --listening tonight.

I didn't try turning off both other listeners and then restarting all three but when I refreshed from my 10.1 backup the listener started up with no problems.

Regarding the last question, see my response to Mladen.

One additional note on something I tried after sending the email to the list. I tried adding the 10.2 instance to one of the 9.2 listeners (figuring I could run that way on a temporary basis) and while the listener came up I was unable to connect.

This was the entry:

listener_rtb =

        (ADDRESS = (PROTOCOL = TCP)(HOST = usnjc01urp004)(PORT = 1526))



SID_LIST_listener_rtb =
    (SID_DESC =
(ORACLE_HOME= /oracle/rtbp/product/9.2.0)
(SID_NAME = rtbp)

    (SID_DESC =
(ORACLE_HOME= /oracle/mds/product/10.2.0)
(SID_NAME = mdsdb)

    (SID_DESC =
(ORACLE_HOME = /oracle/rtbp/product/9.2.0)
(PROGRAM = extproc)


This was the error I got when I tried to connect through the listener: ORA-12500: TNS:listener failed to start a dedicated server process

I'm wondering now if the fact that I have PROGRAM = extproc but KEY = EXTPROCRTB could possibly be an issue? Something else to try once the developers release the box to me tonight.

Jay Miller  

-----Original Message-----
From: Mark Bole [] Sent: Tuesday, September 20, 2005 10:24 AM Cc:
Subject: Re: 10.2 listener won't start on same port as 9.2 listener

Have you tried the above step first? Note that ADDRESSes are not limited to TCP protocol. Perhaps you have a conflicting IPC key? What are the results of the "netstat --listening" command run as root?

Break the problem down through process of elimination. Double-check your ORACLE_HOME settings when starting each listener. Eliminate all but one ADDRESS for each listener, and then add them back in one at a time.

But, as Mladen stated, there is rarely a reason to run more than one listener per machine. Why do you need to do this?

Mark Bole


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Received on Tue Sep 20 2005 - 10:44:50 CDT

Original text of this message