Tales From A Lazy Fat DBA

Noticed that some of my test databases monitored in OEM Grid Control started showing status of ‘Agent Unreachable’. This is what we are getting when we tried checking status of the Agent on the servers …

[oracle@prashant ~]$ emctl status dbconsole
OC4J Configuration issue. /u01/app/oracle/product/11.2.0/db_1/oc4j/j2ee/OC4J_DBConsole_prashant_orcl not found.

Below provided steps are sequence of steps that we should adopt in such scenario and will help us to fix the issue most of the times.

• Set the SID
• Drop/Deconfig current EM repository.
• Recreate EM repository for the same DB.
• Re-check the Status using EMCTL commands for both Dbconsole & Agent

1. Set the SID
[oracle@prashant ~]$ echo $ORACLE_SID
orcl

2. Drop/Deconfig current EM repository.
This step will require you to feed deconfig process following details.
SID, Listener Port Number, SYS and SYSMAN Password.

[oracle@prashant ~]$ emca -deconfig dbcontrol db -repos drop;

STARTED EMCA at Apr 12, 2013 10:40:14 PM
EM Configuration Assistant, Version 11.2.0.0.2 Production
Copyright (c) 2003, 2005, Oracle.  All rights reserved.

Enter the following information:
Database SID: orcl
Listener port number: 1521
Password for SYS user:
Password for SYSMAN user:

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

Apr 12, 2013 10:41:14 PM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /u01/app/oracle/cfgtoollogs/emca/REDANT/emca_2013_04_12_22_40_14.log.
Apr 12, 2013 10:41:14 PM oracle.sysman.emcp.EMDBPreConfig performDeconfiguration
WARNING: EM is not configured for this database. No EM-specific actions can be performed.
Apr 12, 2013 10:41:14 PM oracle.sysman.emcp.ParamsManager checkListenerStatusForDBControl
WARNING: Error initializing SQL connection. SQL operations cannot be performed
Apr 12, 2013 10:41:14 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Dropping the EM repository (this may take a while) …

Apr 12, 2013 10:45:42 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully dropped
Enterprise Manager configuration completed successfully
FINISHED EMCA at Apr 12, 2013 10:45:43 PM

3. Recreate EM repository for the same DB.
This step will require you to feed config process following details.
SID, Listener Port Number, Email address (Optional), SMTP server details (Optional) along with SYS and DBSNMP and SYSMAN Password.

[oracle@prashant ~]$ emca -config dbcontrol db -repos create;

STARTED EMCA at Apr 12, 2013 10:46:17 PM
EM Configuration Assistant, Version 11.2.0.0.2 Production
Copyright (c) 2003, 2005, Oracle.  All rights reserved.

Enter the following information:
Database SID: orcl
Listener port number: 1521
Listener ORACLE_HOME [ /u01/app/oracle/product/11.2.0/db_1 ]:
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/11.2.0/db_1

Local hostname ……………. prashant
Listener ORACLE_HOME ……………. /u01/app/oracle/product/11.2.0/db_1
Listener port number ……………. 1521
Database SID ……………. orcl
Email address for notifications ……………
Outgoing Mail (SMTP) server for notifications ……………

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

Apr 12, 2013 10:46:59 PM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /u01/app/oracle/cfgtoollogs/emca/REDANT/emca_2013_04_12_22_46_16.log.
Apr 12, 2013 10:47:00 PM oracle.sysman.emcp.EMReposConfig createRepository
INFO: Creating the EM repository (this may take a while) …

Apr 12, 2013 10:54:15 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully created
Apr 12, 2013 10:54:28 PM oracle.sysman.emcp.EMReposConfig uploadConfigDataToRepository
INFO: Uploading configuration data to EM repository (this may take a while) …
Apr 12, 2013 10:55:43 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Uploaded configuration data successfully
Apr 12, 2013 10:55:47 PM oracle.sysman.emcp.util.DBControlUtil configureSoftwareLib
INFO: Software library configured successfully.
Apr 12, 2013 10:55:47 PM oracle.sysman.emcp.EMDBPostConfig configureSoftwareLibrary
INFO: Deploying Provisioning archives …
Apr 12, 2013 10:56:06 PM oracle.sysman.emcp.EMDBPostConfig configureSoftwareLibrary
INFO: Provisioning archives deployed successfully.
Apr 12, 2013 10:56:06 PM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Securing Database Control (this may take a while) …
Apr 12, 2013 10:56:40 PM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Database Control secured successfully.
Apr 12, 2013 10:56:40 PM oracle.sysman.emcp.util.DBControlUtil startOMS
INFO: Starting Database Control (this may take a while) …

Apr 12, 2013 10:57:23 PM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: Database Control started successfully
Apr 12, 2013 10:57:23 PM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: >>>>>>>>>>> The Database Control URL is https://prashant:5500/em <<<<<<<<<<<
Apr 12, 2013 10:57:32 PM oracle.sysman.emcp.EMDBPostConfig invoke
WARNING:
************************  WARNING  ************************

Management Repository has been placed in secure mode wherein Enterprise Manager data will be encrypted.  The encryption key has been placed in the file: /u01/app/oracle/product/11.2.0/db_1/prashant_REDANT/sysman/config/emkey.ora.   Please ensure this file is backed up as the encrypted data will become unusable if this file is lost.

***********************************************************
Enterprise Manager configuration completed successfully

4. Re-check the Status using EMCTL commands for both Dbconsole & Agent.

[oracle@prashant ~]$ emctl status dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation.  All rights reserved.
https://prashant:5500/em/console/aboutApplication
Oracle Enterprise Manager 11g is running.
——————————————————————
Logs are generated in directory /u01/app/oracle/product/11.2.0/db_1/prashant_REDANT/sysman/log

[oracle@prashant ~]$ emctl status agent
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation.  All rights reserved.
—————————————————————
Agent Version     : 10.2.0.4.2
OMS Version       : 10.2.0.4.2
Protocol Version  : 10.2.0.4.2
Agent Home        : /u01/app/oracle/product/11.2.0/db_1/prashant_REDANT
Agent binaries    : /u01/app/oracle/product/11.2.0/db_1
Agent Process ID  : 26794
Parent Process ID : 26757
Agent URL         : https://prashant:3938/emd/main
Repository URL    : https://prashant:5500/em/upload/
Started at        : 2013-04-12 22:56:42
Started by user   : oracle
Last Reload       : 2013-04-12 22:56:42
Last successful upload                       : 2013-04-12 22:58:34
Total Megabytes of XML files uploaded so far :    10.04
Number of XML files pending upload           :        0
Size of XML files pending upload(MB)         :     0.00
Available disk space on upload filesystem    :    26.87%
Data channel upload directory                : /u01/app/oracle/product/11.2.0/db_1/prashant_REDANT/sysman/recv
Last successful heartbeat to OMS             : 2013-04-12 22:58:24
—————————————————————
Agent is Running and Ready

OEM Final screen is up!