I strongly believe if you’ve deployed agents a coupled of times, you’ve encountered the following error after the installation:

[oracle@dg2 bin]$ ./emctl upload agent
Oracle Enterprise Manager 10g Release 3 Grid Control 10.2.0.3.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
—————————————————————
EMD upload error: uploadXMLFiles skipped :: OMS version not checked yet..

The first thing that should be done is checking the log file. Switch to the following directory and tail the log file:

cd /u01/oracle/product/10.2.0/agent10g/sysman/log
tail -f emagent.trc

Here’s the output from the log file:

2012-07-26 03:46:33 Thread-51022736 ERROR pingManager: nmepm_pingReposURL: Did not receive a response header from repository
2012-07-26 03:47:08 Thread-51022736 ERROR pingManager: nmepm_pingReposURL: Did not receive a response header from repository
2012-07-26 03:47:08 Thread-51022736 ERROR pingManager: nmepm_pingReposURL: Did not receive a response header from repository

I checked the status of the agent and saw that it’s running :

[oracle@dg2 bin]$ ./emctl status agent
Oracle Enterprise Manager 10g Release 3 Grid Control 10.2.0.3.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
—————————————————————
Agent Version : 10.2.0.3.0
OMS Version : 10.2.0.3.0
Protocol Version : 10.2.0.2.0
Agent Home : /u01/oracle/product/10.2.0/agent10g
Agent binaries : /u01/oracle/product/10.2.0/agent10g
Agent Process ID : 27772
Parent Process ID : 27755
Agent URL : http://dg2:3872/emd/main/
Repository URL : http://dg1:4889/em/upload/
Started at : 2012-07-26 03:42:04
Started by user : oracle
Last Reload : 2012-07-26 03:42:04
Last successful upload : (none)
Last attempted upload : (none)
Total Megabytes of XML files uploaded so far : 0.00
Number of XML files pending upload : 21
Size of XML files pending upload(MB) : 3.25
Available disk space on upload filesystem : 58.86%
Last attempted heartbeat to OMS : 2012-07-26 03:45:22
Last successful heartbeat to OMS : unknown
—————————————————————
Agent is Running and Ready
[oracle@dg2 bin]$
[oracle@dg2 bin]$

So I decided to clear unnecessary files that can’t be uploaded to the Grid Control under the following directories:

$AGENT_HOME/sysman/emd/collection

$AGENT_HOME/sysman/emd/state

$AGENT_HOME/sysman/emd/recv

$AGENT_HOME/sysman/emd/upload

$AGENT_HOME/sysman/emd/lastupld.xml

Then stopped the agent, secured it, cleared unnecessary files again with clearstate parameter, started the agent and uploaded.

[oracle@dg2 bin]$ ./emctl stop agent
Oracle Enterprise Manager 10g Release 3 Grid Control 10.2.0.3.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
Stopping agent …. stopped.

 
[oracle@dg2 bin]$ ./emctl secure agent
Oracle Enterprise Manager 10g Release 3 Grid Control 10.2.0.3.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
Enter Agent Registration password :
Agent is already stopped… Done.
Securing agent… Started.
Requesting an HTTPS Upload URL from the OMS… Done.
Requesting an Oracle Wallet and Agent Key from the OMS…
Done.
Check if HTTPS Upload URL is accessible from the agent… Done.
Configuring Agent for HTTPS in CENTRAL_AGENT mode… Done.
EMD_URL set in /u01/oracle/product/10.2.0/agent10g/sysman/config/emd.properties
Securing agent… Successful.
[oracle@dg2 bin]$

 
[oracle@dg2 bin]$ ./emctl clearstate agent
Oracle Enterprise Manager 10g Release 3 Grid Control 10.2.0.3.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
EMD clearstate completed successfully
[oracle@dg2 bin]$ ./emctl start agent
Oracle Enterprise Manager 10g Release 3 Grid Control 10.2.0.3.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
Starting agent ….. started.

 
[oracle@dg2 bin]$ ./emctl upload agent
Oracle Enterprise Manager 10g Release 3 Grid Control 10.2.0.3.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
—————————————————————
EMD upload completed successfully

 
[oracle@dg2 bin]$ ./emctl upload agent
Oracle Enterprise Manager 10g Release 3 Grid Control 10.2.0.3.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
—————————————————————
EMD upload completed successfully
[oracle@dg2 bin]$

Then I checked Grid Control and made sure that the agent is working

Today, while installing agent I failed again. The reason was that I was trying to install 10gR2 agent on OEL5.5 which is not supported. During the installation I got the following error:

./agentDownload.linux_x64 -b /u01/oracle/product/10.2.0/ -m dg1 -r 4889
Performing check for CertifiedVersions
Checking operating system requirements …
Expected result: One of redhat-3,redhat-4,SuSE-8,SuSE-9,SuSE-10
Actual Result: redhat-5.5
Check complete. The overall result of this check is: Failed <<<<
Check complete: Failed <<<<
Problem: Oracle EnterPrise Manager 10gR2 is not certified on the current operating system.
Recommendation: Make sure you are installing the software on the correct platform.

PrereqChecks complete

Completed with Status=255

[oracle@dg2 tmp]

Although I’ve changed /etc/redhat-release file to “redhat-4” I got the above error. So I decided to edit the agentDownload script and make it to bypass the PreRequisite checks

I opened the file and find that the runInstaller is called ExecAgentInstall() procedure. I get down to the line 269 and edit it as follows:

Before: ignoreSysPrereqs=${silentPatchCheck:+”-ignoreSysPrereqs”}

After: ignoreSysPrereqs=”-ignoreSysPrereqs use_prereq_checker=false “

Here’s the output from the documentation related with this parameter:

Then I saved the file and run the first command again. Fortunately it bypassed the PreRequisite check and installation finished successfully

Installation in progress (Thu Jul 26 03:34:46 AZST 2012)
……………………………………………………… 39% Done.
……………………………………………………… 78% Done.
Install successful

I’ve wrongly installed 64 bit Oracle 10g Grid Control installation on 32 bit Linux. The installation went smooth, but while trying to deploy an agent on the different host, I got the following error:

Resolving dg1… 192.168.153.128

Connecting to dg1|192.168.153.128|:4889… connected.
HTTP request sent, awaiting response… 200 OK
Length: 19533 (19K)

[text language=”/plain”][/text]

Saving to: `agent_download.rsp’

100%[======================================>] 19,533 –.-K/s in 0s

2012-07-25 23:43:32 (91.2 MB/s) – `agent_download.rsp’ saved [19533/19533]

Finished Downloading with Status=0
Downloaded response with status=0
Downloading Oracle Installer …
–2012-07-25 23:43:32– http://dg1:4889/agent_download/10.2.0.3.0/linux/oui/oui_linux.jar
Resolving dg1… 192.168.153.128
Connecting to dg1|192.168.153.128|:4889… connected.
HTTP request sent, awaiting response… 404 Not Found
2012-07-25 23:43:32 ERROR 404: Not Found.

After checking the output, I saw the folder – “…/10.2.0.3.0/linux/oui…..”

I checked the folder at the Grid installation site and and as it was 64 bit installation, the folder was names “linux_x64”

$ORACLE_HOME/sysman/agent_download/10.2.0.3.0/linux_x64

I renamed the folder and run the installation command again. But I got the same error. When checking the output, I saw that it’s looking for oui_linux.jar file which is probably “linux_x64.jar” at the Grid site. I opened agentDownload.linux_x64 file which I copied from Grid site and checked for linux_x64 keyword. I changed line 362:

“Linux.x86_64”) os =linux_x64;;

to

“Linux.x86_64”) os =linux;;

And renamed oui_linux_x64.jar file to oui_linux.jar

And the installation succeeded

I would strongly reccomend you to install correct version of the Grid Control and Oracle Software. If you’re running 32 bit OS, then install 32 bit Software and do the same for 64 bit installation