Modifying the Listener Port for Database Control

A coworker was installing 10Gr2 on a windows server which already had an existing 9i environment. They wanted the database console to connect via the 10G listener (non-standard port 1522) and not the 9i (standard port 1521) to keep the environments separate.

I was able to find the following document which lists all of the default ports used by Enterprise Manager (10g).

Subject: Overview of Default Ports Used by EM 10g Grid Control, DB Control and AS Control
Doc ID: Note:235298.1

Search for "SQL*Net Listener for the 10g DB" and it will list the modifications required in order to change the listener port. The steps in this section assume you need to change the listener port as well. Since the listener was already created for me here are the steps I had to follow:

1. Stop DB Control by executing the command emctl stop dbconsole

2. Modify the agent to reflect the new port number. Edit $ORACLE_HOME/<hostname_sid>/sysman/emd/targets.xml

The instructions say you only need to modify the listener port value. However, I noticed that there are two entries in this file. One is for the database and another for the listener, each pointing to the default port of 1521. I'm not sure if I needed to change the database port but since the DBA wanted to keep both environments separate I changed it to be safe. I didn't test this procedure without making that change.

Here is a copy of the file (of course username and password values were modified. ;).

<Targets AGENT_SEED="39661000">
<Target TYPE="oracle_emd" NAME="myserver.mydomain:1830"/>
<Target TYPE="host" NAME="myserver.mydomain" DISPLAY_NAME="myserver.mydomain" VERSION="1.0"/>
<Target TYPE="oracle_database" NAME="mydb10g" VERSION="1.0">
<Property NAME="MachineName" VALUE="myserver"/>
<Property NAME="Port" VALUE="1522"/>
<Property NAME="SID" VALUE="mydb10g"/>
<Property NAME="OracleHome" VALUE="D:\oracle\ora10g"/>
<Property NAME="UserName" VALUE="1993cs3901f8d5af7" ENCRYPTED="TRUE"/>
<Property NAME="password" VALUE="8c35Da9iks4e07bab7b6c5906a837f4" ENCRYPTED="TRUE"/>
<Target TYPE="oracle_listener" NAME="LISTENER_myserver" VERSION="1.0">
<Property NAME="Machine" VALUE="myserver"/>
<Property NAME="LsnrName" VALUE="LISTENER10g"/>
<Property NAME="Port" VALUE="1522"/>
<Property NAME="OracleHome" VALUE="D:\oracle\ora10g"/>
<Property NAME="ListenerOraDir" VALUE="D:\oracle\ora10g\network\admin"/>

3. Modify $ORACLE_HOME/<hostname_sid>/sysman/config/ to reflect the new port. Two entries have to be modified here as well. emdRepPort and emdRepConnectDescriptor should reflect the new port number.

Here are the modified entries with 1522 replacing the standard port 1521.


4. Last but not least start up database console with emctl start dbconsole and verify that you can login successfully.


Error cloning a clone

A few posts ago I hit an issue with executing the runInstaller. It still surprised me that after hundreds of installs you can still hit new errors. The other day I hit a new error while cloning an EBS environment. While preparing the environment for cloning (executing dbTier), the error below appeared:

RC-50409: Topology information required for cloning not found in the database. Make sure that
AutoConfig was run successfully prior to starting Rapid Clone, and try again
Raised by
RC-50208: Exception in method gen_crctrfclone_sql
RC-50208: Exception in Constructor AdCreateCtlFile
Raised by

This particular environment is a clone of our production environment. After it was built users had performed some work and wanted it cloned to another environment. There are two solutions for this particular error, which can be found in detail in Metalink Note: 376964.1.

The easiest solution is to run autoconfig at the dbTier level. The curious part is that since this environment is a clone of production, autoconfig would would have been executed as part of the post cloning steps ( dbTier). I checked my post cloning logs and indeed it completed successfully. I executed autoconfig ($ORACLE_HOME/appsutil/bin/ on the database tier again and the preclone script finished without error.