Home » RDBMS Server » Networking and Gateways » Listener down on one node (Oracle 10.2.0.4 , Linux AS4)
Listener down on one node [message #392634] Wed, 18 March 2009 13:22 Go to next message
rsreddy28
Messages: 295
Registered: May 2007
Senior Member
Hi All,

We got the below alert from OEM Grid Control

Target Name=LISTENER_USAZDBA40

Severity=Critical
Message=The listener is down: Although a Listener with name "LISTENER_USAZDBA4", is running on this host at port: "1521", it was not started using this target's "LISTENER.ORA" file.

CORRECTIVE ACTION: To monitor this "EM Listener Target" with its present configuration, you must stop the currently running listener process, and start it again using the Listener Parameter file: /opt/oracle/db/network/admin/listener.ora . Alternatively, you can update this target's "LISTENER.ORA Location" parameter with the location of the currently running Listener, which was started using: /opt/oracle/asm/network/admin/listener.ora.
Notification Rule Name=Listener Availability
Notification Rule Owner=SYSMAN

Should we have a seperate listener one for the ASM instance and one for the RDBMS instance , and both are in different locations .

Do we really 2 listeners for the same host ?

Please clarify my doubt.

Regards,
Raj
Re: Listener down on one node [message #392636 is a reply to message #392634] Wed, 18 March 2009 13:29 Go to previous messageGo to next message
Mahesh Rajendran
Messages: 10615
Registered: March 2002
Location: oracleDocoVille
Senior Member
Account Moderator
>>Do we really 2 listeners for the same host ?
Totally upto you.
By separating the listeners you are separating the services.
Thats it.
Re: Listener down on one node [message #392643 is a reply to message #392636] Wed, 18 March 2009 13:42 Go to previous messageGo to next message
rsreddy28
Messages: 295
Registered: May 2007
Senior Member
No Mahesh,

What I mean , there is a listener in the ASM home and one in the RDBMS home . And both are using the same port no. 1521. I know we can use the multiple listener's with the same port No. But if you can see the OEM alert below, I was confused what made it to trigger that alert .

Message=The listener is down: Although a Listener with name "LISTENER_USAZDBA4", is running on this host at port: "1521", it was not started using this target's "LISTENER.ORA" file.

A small clarification what made it to trigger that
Re: Listener down on one node [message #392646 is a reply to message #392643] Wed, 18 March 2009 14:04 Go to previous messageGo to next message
Mahesh Rajendran
Messages: 10615
Registered: March 2002
Location: oracleDocoVille
Senior Member
Account Moderator
>>what made it to trigger that alert

Your configuration.
I do not use OEM grid.
>>it was not started using this target's "LISTENER.ORA" file
It seems the OEM is looking into a wrong listener.ora.
Go to the host/target (or whatever it means these days) and
Just use the right one.
Re: Listener down on one node [message #392647 is a reply to message #392643] Wed, 18 March 2009 14:06 Go to previous messageGo to next message
babuknb
Messages: 1718
Registered: December 2005
Location: NJ
Senior Member

Check your hostname

thanks
Re: Listener down on one node [message #392648 is a reply to message #392643] Wed, 18 March 2009 14:08 Go to previous messageGo to next message
Mahesh Rajendran
Messages: 10615
Registered: March 2002
Location: oracleDocoVille
Senior Member
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Metalink Note 605681.1
Re: Listener down on one node [message #392663 is a reply to message #392648] Wed, 18 March 2009 16:23 Go to previous messageGo to next message
rsreddy28
Messages: 295
Registered: May 2007
Senior Member
Hi Mahesh,

Thanks for that Metalink Note. It really solved me to a great extent .

Thanks again .

And one more thing can we have the listener in any location and run it . And how soon the listener.log gets updated by PMON.
Re: Listener down on one node [message #392671 is a reply to message #392663] Wed, 18 March 2009 18:08 Go to previous message
Mahesh Rajendran
Messages: 10615
Registered: March 2002
Location: oracleDocoVille
Senior Member
Account Moderator
>>And one more thing can we have the listener in any location and run it
You mean, the listener being in a remote machine accessing the database?
If so, it is possible but not recommended.
In the later version of Oracle, You can administer the listener
from remote and You may want to turn that "OFF" too ( to prevent DOS attacks).
>>And how soon the listener.log gets updated by PMON.
I have no idea with respect to an exact measure.
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