After WebLogic Server (WLS) Patch Set Update 12.2.1.3.201217 is applied on Oracle Enterprise Manager (OEM) 13.4.0.9 home, two of Oracle Coherence Cache objects in WebLogic Domain '/EMGC_GCDomain/GCDomain' show Down in EM console.
It can be fixed by removing and re-adding the targets as following,
1. Remove the Oracle Coherence Cache Targets showing Down from OEM
* In the OEM Console, navigate to 'Targets' > 'Middleware'
* On left panel expand 'Target Type', then expand 'Coherence', Select Oracle Coherence Cache. All Oracle Coherence Cache targets will be listed on the right window.
* Right click on the name of the targets showing Down, click pop-up menu 'Target Setup' > 'Remove Target'
The Down targets are deleted from OEM console.
2. Refresh the domain '/EMGC_GCDomain/GCDomain' to add removed/missing Oracle Coherence Cache objects
* In the OEM Console, navigate to 'Targets' > 'Middleware'
* On left panel, clear the selection you did while removing the targets. The Oracle WebLogic Domain '/EMGC_GCDomain/GCDomain' will be listed in right window
* Click the domain name '/EMGC_GCDomain/GCDomain'
* Navigate to the 'Refresh Weblogic Domain' in the Drop-Down menu on the home page of target '/EMGC_GCDomain/GCDomain'
* New Screen will appear, click on "Add and Update Targets..."
* Following the prompt to add new found targets
The removed targets will be added with new target names.
