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Basic Enterprise Manager Troubleshooting

The web-based Enterprise Manager tool was introduced in Oracle 10g and has significant

functionality improvements over previous versions. Even so, it seems there is not a day goes by

without someone asking how to solve an Enterprise Manager configuration issue, so this articleexplains the first things you should look at. It's not meant to be an all encompassing guide. Just a

first shot.

Make sure the "/etc/hosts" file contains at least the loopback address and preferably the machine

definition also.

127.0.0.1 localhost.localdomain localhost

192.168.0.181 myserver.localdomain myserver

If you are using 11g, make sure the ORACLE_HOSTNAME and ORACLE_UNQNAME

environment variables are set correctly.

ORACLE_HOSTNAME=myserver.localdomain; export ORACLE_HOSTNAME

ORACLE_UNQNAME=DB11G; export ORACLE_UNQNAME

Check the listener is running correctly.

lsnrctl status

If you get something like the following, your listener is not running and you need to start it using

the "lsnrctl start" command.

$ lsnrctl status

LSNRCTL for Linux: Version 11.1.0.7.0 - Production on 13-MAR-2009 13:32:49

Copyright (c) 1991, 2008, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))

TNS-12541: TNS:no listener

TNS-12560: TNS:protocol adapter error

TNS-00511: No listener

Linux Error: 2: No such file or directory

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=oel5-

11g.localdomain)(PORT=1521)))

TNS-12541: TNS:no listener

TNS-12560: TNS:protocol adapter errorTNS-00511: No listener

Linux Error: 111: Connection refused

$

Next, check the Enterprise Manager service is running.

$ emctl start dbconsole

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Assuming the console is already running, or fails to start, the next thing to do is to reconfigure

Enterprise Manager. This is done using the Enterprise Manager Configuration Assistant

(EMCA). For a first attempt, run the following command. Remember to add the "-cluster" option

to the end for RAC databases.

$ emca -config dbcontrol db -repos recreate

If it all goes well you would expect to see something like this.

$ emca -config dbcontrol db -repos recreate

STARTED EMCA at Mar 13, 2009 11:32:35 AM

EM Configuration Assistant, Version 11.1.0.7.0 Production


Enter the following information:

Database SID: DB11G

Database Control is already configured for the database DB11G

You have chosen to configure Database Control for managing the database DB11GThis will remove the existing configuration and the default settings and

perform a fresh configuration

Do you wish to continue? [yes(Y)/no(N)]: Y

Listener port number: 1521

Password for SYS user:

Password for DBSNMP user:

Password for SYSMAN user:

Email address for notifications (optional):

Outgoing Mail (SMTP) server for notifications (optional):

-----------------------------------------------------------------

You have specified the following settings

Database ORACLE_HOME ................ /u01/app/oracle/product/11.1.0/db_1

Local hostname ................ oel5-11g.localdomain

Listener port number ................ 1521

Database SID ................ DB11G

Email address for notifications ...............

Outgoing Mail (SMTP) server for notifications ...............

-----------------------------------------------------------------


Mar 13, 2009 11:33:19 AM oracle.sysman.emcp.EMConfig perform

INFO: This operation is being logged at

/u01/app/oracle/cfgtoollogs/emca/DB11G/emca_2009_03_13_11_32_35.log.

Mar 13, 2009 11:33:20 AM oracle.sysman.emcp.util.PortManager isPortInUseWARNING: Specified port 5540 is already in use.

Mar 13, 2009 11:33:20 AM oracle.sysman.emcp.util.PortManager isPortInUse

WARNING: Specified port 5520 is already in use.





Mar 13, 2009 11:33:20 AM oracle.sysman.emcp.util.DBControlUtil stopOMS

INFO: Stopping Database Control (this may take a while) ...

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Mar 13, 2009 11:33:22 AM oracle.sysman.emcp.EMReposConfig invoke

INFO: Dropping the EM repository (this may take a while) ...


INFO: Repository successfully dropped

Mar 13, 2009 11:35:12 AM oracle.sysman.emcp.EMReposConfig createRepository

INFO: Creating the EM repository (this may take a while) ...


INFO: Repository successfully created

Mar 13, 2009 11:40:11 AM oracle.sysman.emcp.EMReposConfig

uploadConfigDataToRepository

INFO: Uploading configuration data to EM repository (this may take a while)

...


INFO: Uploaded configuration data successfully

Mar 13, 2009 11:41:07 AM oracle.sysman.emcp.util.DBControlUtil

configureSoftwareLib

INFO: Software library configured successfully.

Mar 13, 2009 11:41:07 AM oracle.sysman.emcp.EMDBPostConfig

configureSoftwareLibrary

INFO: Deploying Provisioning archives ...

Mar 13, 2009 11:41:16 AM oracle.sysman.emcp.EMDBPostConfigconfigureSoftwareLibrary

INFO: Provisioning archives deployed successfully.


secureDBConsole

INFO: Securing Database Control (this may take a while) ...


secureDBConsole

INFO: Database Control secured successfully.

Mar 13, 2009 11:41:28 AM oracle.sysman.emcp.util.DBControlUtil startOMS

INFO: Starting Database Control (this may take a while) ...


performConfiguration

INFO: Database Control started successfully



INFO: >>>>>> The Database Control URL is https://oel5-11g.localdomain:1158/em

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emca -deconfig dbcontrol db -repos drop

emca -config dbcontrol db -repos create

The deconfig will look something like this.

$ emca -deconfig dbcontrol db -repos drop

STARTED EMCA at Mar 13, 2009 12:09:48 PM




Database SID: DB11G





Mar 13, 2009 12:10:07 PM oracle.sysman.emcp.EMConfig perform



Mar 13, 2009 12:10:08 PM oracle.sysman.emcp.util.DBControlUtil stopOMS

INFO: Stopping Database Control (this may take a while) ...

Mar 13, 2009 12:10:31 PM oracle.sysman.emcp.EMReposConfig invoke

INFO: Dropping the EM repository (this may take a while) ...


INFO: Repository successfully dropped

Enterprise Manager configuration completed successfully

FINISHED EMCA at Mar 13, 2009 12:12:02 PM

$

The config will look something like this.

$ emca -config dbcontrol db -repos create

STARTED EMCA at Mar 13, 2009 12:37:27 PM




Database SID: DB11G



Password for DBSNMP user:


Password for SYSMAN user: Email address for notifications (optional):

Outgoing Mail (SMTP) server for notifications (optional):-----------------------------------------------------------------

You have specified the following settings

Database ORACLE_HOME ................ /u01/app/oracle/product/11.1.0/db_1

Local hostname ................ oel5-11g.localdomain

Listener port number ................ 1521

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Database SID ................ DB11G

Email address for notifications ...............

Outgoing Mail (SMTP) server for notifications ...............

-----------------------------------------------------------------


Mar 13, 2009 12:37:54 PM oracle.sysman.emcp.EMConfig perform



Mar 13, 2009 12:37:55 PM oracle.sysman.emcp.EMReposConfig createRepository

INFO: Creating the EM repository (this may take a while) ...


INFO: Repository successfully created

Mar 13, 2009 12:42:07 PM oracle.sysman.emcp.EMReposConfig

uploadConfigDataToRepository

INFO: Uploading configuration data to EM repository (this may take a while)

...


INFO: Uploaded configuration data successfully

Mar 13, 2009 12:42:59 PM oracle.sysman.emcp.util.DBControlUtil

configureSoftwareLibINFO: Software library configured successfully.

Mar 13, 2009 12:42:59 PM oracle.sysman.emcp.EMDBPostConfig


INFO: Deploying Provisioning archives ...



INFO: Provisioning archives deployed successfully.


secureDBConsole

INFO: Securing Database Control (this may take a while) ...


secureDBConsole

INFO: Database Control secured successfully.

Mar 13, 2009 12:43:20 PM oracle.sysman.emcp.util.DBControlUtil startOMS

INFO: Starting Database Control (this may take a while) ...



INFO: Database Control started successfully



INFO: >>>>>> The Database Control URL is https://oel5-11g.localdomain:5500/em

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For the vast majority of cases I come across, these steps solve the problem.

For more information see:

EMCA Troubleshooting Tips (10gR2)

Deleting and Creating Database Control Objects (11gR2)

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