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Oracle Enterprise Manager Communication Error [message #441698]

Tue, 02 February 2010 13:54

Ricky_1362002
Messages: 111
Registered: February 2009

Senior Member

We have the Oracle Enterprise Manager Grid Control 10.2.0.5. We recently upgraded our Databases from 10.2.0.3 to 10.2.0.4 and since then we are having this problem.

Whenever i click an Agent on the Grid Control it gives me this error:

 "Communication between the Oracle Management Service host to the Agent host is unavailable. Any functions or displayed information requiring this communication link will be unavailable. For example: deleting/configuring/adding targets, uploading metric data, or displaying Agent home page information such as Agent to Management Service Response Time (ms)."

I get the same error when i try to configure a host or a database.

Don't know what is wrong

Can someone help please????

Thanks,
Munna

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Re: Oracle Enterprise Manager Communication Error [message #441719 is a reply to message #441698]

Tue, 02 February 2010 21:12

ramoradba
Messages: 2457
Registered: January 2009
Location: AndhraPradesh,Hyderabad,I...

Senior Member

As Google MY friend,
I googled the error for you...
http://forums.oracle.com/forums/thread.jspa?threadID=1001536&tstart=0

And from the above link someone solved his problem.
IT contains Metalink information(Address not the content) too.
So will you please search for it and have a solution ?

And next time can you split your error message into more than one line if it contain more than 80 characters ...
Why because it is not in the readable format...
please read the forum Guide lines.....
sriram Smile

[Updated on: Tue, 02 February 2010 21:12]

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Re: Oracle Enterprise Manager Communication Error [message #441891 is a reply to message #441698]

Wed, 03 February 2010 12:40

Ricky_1362002
Messages: 111
Registered: February 2009

Senior Member

Thank you Sriram.

But you know what, one of the posts in that link which you posted is posted by me, and i did try that, but didn't work for me.

http://forums.oracle.com/forums/thread.jspa?threadID=1001536&tstart=0

The last post in the above link is:

Quote:

Two jobs in the OEM database was not running.

EMD_NOTIFICATION.CHECK_FOR_SEVERITIES();
and
EM_PING.MARK_NODE_STATUS();

After re-enabling the jobs, everything looks right again!
OEM now reports "The agent of this target is unreachable." when the agent is not running.

I was not able to re-enable those jobs, because those jobs were already online, i am struck here as to what to do?

Should i run them once now? or put them offline and then again online??

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Re: Oracle Enterprise Manager Communication Error [message #441897 is a reply to message #441891]

Wed, 03 February 2010 13:56

LKBrwn_DBA
Messages: 487
Registered: July 2003
Location: WPB, FL

Senior Member

When everything else fails, re-boot...

No wait, you could try this:

export AH=/opt/oracle/oms/agent10g
cd $AH/bin
./emctl stop agent
rm -fr $AH/sysman/emd/state/*
rm -fr $AH/sysman/emd/collection/*
rm -fr $AH/sysman/emd/upload/*
rm -f  $AH/sysman/emd/lastupld.xml
rm -f  $AH/sysman/emd/agntstmp.txt
rm -f  $AH/sysman/emd/blackouts.xml
./emctl secure agent {agent password}
./emctl start agent
./emctl upload agent

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Re: Oracle Enterprise Manager Communication Error [message #441905 is a reply to message #441698]

Wed, 03 February 2010 15:52

Ricky_1362002
Messages: 111
Registered: February 2009

Senior Member

Thank you LKBrwn_DBA.

I did try that many times, it works but only for that point of time, later again we get the same error message. We never know, it might work for some people out there.

But you missed something after deleting all. Its the "clearstate" command i.e. after deleting the blackouts.xml, do this:

# emctl clearstate agent

and then do the secure,start and upload.

Thanks anyways.

Here is the actual solution which i got from my friend:

There is a known bug in the 10.2.0.4 Agent and this error message. Go to the Oracle Metalink Note 737962.1:How to skip Healthcheck metric collection after three consecutive failures

Its a Patch and need to be applied to the agent home.

Hope this helps anyone having the same problem.

Thanks,

Munna

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