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Wednesday, April 11, 2018

DB Console service won't start



First, 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 11.2.0.4.0 - Production on 13-MAR-2018 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=doyen25.localdomain)(PORT=1521)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
$
Next, check the Enterprise Manager service is running.
emctl start dbconsole
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.
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, 2018 11:32:35 AM
EM Configuration Assistant, Version 11.2.0.4.0 Production
Copyright (c) 2003, 2005, Oracle.  All rights reserved.

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 DB11G
This 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/11.2.0/db_1

Local hostname ................ doyen25.localdomain
Listener port number ................ 1521
Database SID ................ DB11G
Email address for notifications ...............
Outgoing Mail (SMTP) server for notifications ...............

-----------------------------------------------------------------
Do you wish to continue? [yes(Y)/no(N)]: Y
Mar 13, 2018 11:33:19 AM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /u01/app/oracle/cfgtoollogs/emca/DB11G/emca_2018_03_13_11_32_35.log.
Mar 13, 2018 11:33:20 AM oracle.sysman.emcp.util.PortManager isPortInUse
WARNING: Specified port 5540 is already in use.
Mar 13, 2018 11:33:20 AM oracle.sysman.emcp.util.PortManager isPortInUse
WARNING: Specified port 5520 is already in use.
Mar 13, 2018 11:33:20 AM oracle.sysman.emcp.util.PortManager isPortInUse
WARNING: Specified port 1158 is already in use.
Mar 13, 2018 11:33:20 AM oracle.sysman.emcp.util.PortManager isPortInUse
WARNING: Specified port 3938 is already in use.
Mar 13, 2018 11:33:20 AM oracle.sysman.emcp.util.DBControlUtil stopOMS
INFO: Stopping Database Control (this may take a while) ...
Mar 13, 2018 11:33:22 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Dropping the EM repository (this may take a while) ...
Mar 13, 2018 11:35:12 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully dropped
Mar 13, 2018 11:35:12 AM oracle.sysman.emcp.EMReposConfig createRepository
INFO: Creating the EM repository (this may take a while) ...
Mar 13, 2018 11:40:06 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully created
Mar 13, 2018 11:40:11 AM oracle.sysman.emcp.EMReposConfig uploadConfigDataToRepository
INFO: Uploading configuration data to EM repository (this may take a while) ...
Mar 13, 2018 11:41:01 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Uploaded configuration data successfully
Mar 13, 2018 11:41:07 AM oracle.sysman.emcp.util.DBControlUtil configureSoftwareLib
INFO: Software library configured successfully.
Mar 13, 2018 11:41:07 AM oracle.sysman.emcp.EMDBPostConfig configureSoftwareLibrary
INFO: Deploying Provisioning archives ...
Mar 13, 2018 11:41:16 AM oracle.sysman.emcp.EMDBPostConfig configureSoftwareLibrary
INFO: Provisioning archives deployed successfully.
Mar 13, 2018 11:41:16 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Securing Database Control (this may take a while) ...
Mar 13, 2018 11:41:28 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Database Control secured successfully.
Mar 13, 2018 11:41:28 AM oracle.sysman.emcp.util.DBControlUtil startOMS
INFO: Starting Database Control (this may take a while) ...
Mar 13, 2018 11:42:31 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: Database Control started successfully
Mar 13, 2018 11:42:34 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: >>>>>> The Database Control URL is https://doyen25.localdomain:1158/em <<<<<< Mar 13, 2018 11:42:48 AM 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/doyen25.localdomain_DB11G/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 FINISHED EMCA at Mar 13, 2018 11:42:48 AM $
If this fails, then de-configure and configure Enterprise Manager.
If this fails, then de-configure and configure Enterprise Manager.

emca -deconfig dbcontrol db -repos drop
emca -config dbcontrol db -repos create

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