RE: heads up on em grid upgrade

From: D'Hooge Freek <>
Date: Sun, 14 Feb 2010 12:50:26 +0100
Message-ID: <>

Related to this:

If you are using an 11g database as repository for the grid control, you also might want to check the following mos note: Sysman Password Change Fails when using case sensitive password with 11g repository [ID 794084.1]

I ran into this at a customer site.


Freek D'Hooge
Oracle Database Administrator
tel +32(0)3 451 23 82

From: [] On Behalf Of Niall Litchfield [] Sent: 12 February 2010 23:52
Subject: heads up on em grid upgrade

Just a heads up for anyone tempted to upgrade to GC and migrating to an 11g db as well. We did this and found that apparently agent communication didn't work properly whereas it had previously. In particular GC didn't notice when an agent went down and then manual investigation of the agent page in gc displayed the "cannot communicate with agent host" message. communication was in fact fine.

I spent a lot of time, too much time, on diagnosing comms problems with Oracle support some their problem, some mine.

It turns out that the agent unreachable alert (and therefore notification) that we should have got is triggered by an EM dbms_job (EM_PING.MARK_NODE_STATUS() ). There are various bugs/notes about job_queue processes and em jobs not being submitted. In our case none matched. However I eventually discovered that the new scheduler had been disabled in the repository. This has the unexpected side effect (well unexpected to me) of also disabling all dbms_jobs. Hopefully it won't take you several days to pick this up if it affects you. I guess there will also be other cases where the new scheduler gets disabled and breaks em.

Niall Litchfield
Oracle DBA
Received on Sun Feb 14 2010 - 05:50:26 CST

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