The majority of Enterprise Manager 12c Cloud Control agent installations are pretty straight forward, just do the usual checks, ensuring firewalls are open etc. and then deploy from the EM console. The Windows installations are not as straight forward these days, as the deployment method uses SSH connectivity which requires the installation and configuration of Cygwin as a
Now that Oracle Enterprise Manager Cloud Control 12c Release 3 (aka EM12cR3!) has been out for a few weeks, I decided to brave it and upgrade our Production stack today. In this post, I’ll be upgrading an EM12cR2 (12.1.0.2) installation which consists of two OMSes, running on Linux x86-64 (RHEL5) which uses an 11.2.0.3 database management repository.
Put simply, when you install and configure an Management Agent in a clustered environment to monitor your targets through Enterprise Manager Cloud/Grid Control, then that primary node fails, your Oracle services are moved to a secondary node as part of the clustering…but your OMS isn’t aware of the change in nodes. Now if your agent
After deploying a number of Cloud Control agents recently, a few of the agents started generating critical events with a nasty looking (and unhelpful) error message: Host=[host] Target type=Agent Target name=[host]:[port] Categories=Diagnostics Message=Internal error detected: java.lang.IllegalStateException:oracle.sysman.gcagent.target.interaction.execution.ConfigStateMgr:798. Severity=Critical Whilst the error above isn’t too friendly, it stems from errors with the collection of storage metrics. Further
Shutdown the agent: export AGENT_HOME=/u01/app/oracle/agent11g $AGENT_HOME/bin/emctl stop agent Delete the related targets from Enterprise Manager. Run the deinstaller (silent mode): $AGENT_HOME/oui/bin/runInstaller -invPtrLoc $AGENT_HOME/oraInst.loc -deinstall -silent “REMOVE_HOMES={$AGENT_HOME}” -removeallfiles NOTE: I’ve included the ‘invPtrLoc’ flag above. This is optional, but if you ever come across a server where multiple inventories are used, you’re going to have to