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Dear All,

We have a 11g, 2 node RAC database and we have installed clustered EM DB Control over it.

Today morning i found that the EM was not up and running. When i tried to start it, it showed me the following:

-bash-3.00$ emctl status dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.1.0.7.0
Copyright (c) 1996, 2008 Oracle Corporation.  All rights reserved.
 https://rgpdb1.rg.com:1158/em/console/aboutApplication 
Oracle Enterprise Manager 11g is not running.
------------------------------------------------------------------
Logs are generated in directory /pdb01/oraprod/db/tech_st/11.1.0/rgpdb1_rgprd1/sysman/log
-bash-3.00$
-bash-3.00$
-bash-3.00$
-bash-3.00$ emctl start dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.1.0.7.0
Copyright (c) 1996, 2008 Oracle Corporation.  All rights reserved.
 https://rgpdb1.rg.com:1158/em/console/aboutApplication 
- An instance of Oracle Enterprise Manager 11g Database Control is already running.
-bash-3.00$
-bash-3.00$
-bash-3.00$
-bash-3.00$ emctl stop dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.1.0.7.0
Copyright (c) 1996, 2008 Oracle Corporation.  All rights reserved.
 https://rgpdb1.rg.com:1158/em/console/aboutApplication 
Stopping Oracle Enterprise Manager 11g Database Control ...
...  Stopped.
-bash-3.00$
-bash-3.00$
-bash-3.00$
-bash-3.00$ emctl start dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.1.0.7.0
Copyright (c) 1996, 2008 Oracle Corporation.  All rights reserved.
 https://rgpdb1.rg.com:1158/em/console/aboutApplication 
Starting Oracle Enterprise Manager 11g Database Control ............................................................................................. failed.
------------------------------------------------------------------
Logs are generated in directory /pdb01/oraprod/db/tech_st/11.1.0/rgpdb1_rgprd1/sysman/log
-bash-3.00$
-bash-3.00$
-bash-3.00$
-bash-3.00$
-bash-3.00$ emctl status dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.1.0.7.0
Copyright (c) 1996, 2008 Oracle Corporation.  All rights reserved.
 https://rgpdb1.rg.com:1158/em/console/aboutApplication 
Oracle Enterprise Manager 11g is not running.
------------------------------------------------------------------
Logs are generated in directory /pdb01/oraprod/db/tech_st/11.1.0/rgpdb1_rgprd1/sysman/log

emagent.trc shows following messages:

2011-01-11 12:47:50,837 Thread-251 ERROR pingManager: nmepm_pingReposURL: Cannot connect to https://rgpdb1.rg.com:1158/em/upload/: retStatus=-32
2011-01-11 12:48:20,670 Thread-261 WARN  http: snmehl_connect: connect failed to (rgpdb1.rg.com:1158): Connection refused (error = 146)
2011-01-11 12:48:20,670 Thread-261 ERROR pingManager: nmepm_pingReposURL: Cannot connect to https://rgpdb1.rg.com:1158/em/upload/: retStatus=-32
2011-01-11 12:48:20,671 Thread-261 WARN  http: snmehl_connect: connect failed to (rgpdb1.rg.com:1158): Connection refused (error = 146)
2011-01-11 12:48:20,671 Thread-261 ERROR pingManager: nmepm_pingReposURL: Cannot connect to https://rgpdb1.rg.com:1158/em/upload/: retStatus=-32
2011-01-11 12:48:50,679 Thread-267 WARN  http: snmehl_connect: connect failed to (rgpdb1.rg.com:1158): Connection refused (error = 146)
2011-01-11 12:48:50,679 Thread-267 ERROR pingManager: nmepm_pingReposURL: Cannot connect to https://rgpdb1.rg.com:1158/em/upload/: retStatus=-32
2011-01-11 12:48:50,681 Thread-267 WARN  http: snmehl_connect: connect failed to (rgpdb1.rg.com:1158): Connection refused (error = 146)
2011-01-11 12:48:50,681 Thread-267 ERROR pingManager: nmepm_pingReposURL: Cannot connect to https://rgpdb1.rg.com:1158/em/upload/: retStatus=-32

I verified ports and found there was no issue. Then i got the solution from MOS(metalink):

Check the following processes:

/usr/ucb/ps -axuww | grep emagent
/usr/ucb/ps -axuww | grep DEMS

If the above commands return some running processes, kill them:

-bash-3.00$ kill -9 17676
-bash-3.00$ kill -9 6600

Then i tried the following commands:

-bash-3.00$ emctl stop dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.1.0.7.0
Copyright (c) 1996, 2008 Oracle Corporation.  All rights reserved.
 https://rgpdb1.rg.com:1158/em/console/aboutApplication 
Stopping Oracle Enterprise Manager 11g Database Control ...
...  Stopped.

-bash-3.00$ emctl start dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.1.0.7.0
Copyright (c) 1996, 2008 Oracle Corporation.  All rights reserved.
 https://rgpdb1.rg.com:1158/em/console/aboutApplication 
Starting Oracle Enterprise Manager 11g Database Control ...... started.
------------------------------------------------------------------
Logs are generated in directory /pdb01/oraprod/db/tech_st/11.1.0/rgpdb1_rgprd1/sysman/log

-bash-3.00$ emctl status dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.1.0.7.0
Copyright (c) 1996, 2008 Oracle Corporation.  All rights reserved.
 https://rgpdb1.rg.com:1158/em/console/aboutApplication 
Oracle Enterprise Manager 11g is running.
------------------------------------------------------------------

I logged in and verified, EM was coming up fine.

Hope this helps.
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