The curious case of the blank plugin page in OEM13c

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After an upgrade of Oracle Enterprise Manager from 12.1.0.5 to 13.2, I wanted to deploy a new version of the plugin oracle.sysman.db. Downloaded the new version and got to the plugin-management page to apply the patch. But all I got was a blank page. Cost me quite a while to figure out what the – almost humiliating – workaround / solution eventually was.

Which page am I talking about: Setup—> Extensibility –> Plug-ins.

And the blank page appears.

But.. it could be Microsoft Explorer.

Tried it in Firefox:

Had no Google Chrome to test it out (working in a Citrix client environment, can’t install stuff ).

Examined the html-page source: there is some content, but nothing is shown. Checked the enablement of Java script (unlikely cause, rest is working. Put the browsers in compatibility mode (yes it can): didn’t help either.

Googled, searched My Oracle Support and the community, got 1 good hit, no solution.

Took too much time, back to the command-line for deploying my plugin.

So, checked the plugins through EMCLI.

$ ./emcli list_plugins_on_server
OMS name is <server>:4889_Management_Service
Plug-in Name                                 Plugin-id                     Version [revision]

Oracle Database Appliance                    oracle.dba.odba               13.1.1.1.0
Oracle Cloud Framework                       oracle.sysman.cfw             13.2.1.0.0
Oracle Database                              oracle.sysman.db              13.2.1.0.0
Oracle Fusion Middleware                     oracle.sysman.emas            13.2.1.0.0
Systems Infrastructure                       oracle.sysman.si              13.2.1.0.0
Oracle Exadata                               oracle.sysman.xa              13.2.1.0.0

Deployed the plugin by first exporting the config, deploy the plugin, checked the status (requires downtime):

./emctl exportconfig oms -sysman_pwd “Oracle123#” -dir /home/oracle/job
./emcli deploy_plugin_on_server -plugin=”oracle.sysman.db:13.2.2.0.0″ -repo_backup_taken
./emcli get_plugin_deployment_status -plugin=oracle.sysman.db

So, I moved on, but it really bothers me, back to the browser… must be the browser…

And really, astonished is the right word I think: when zooming out (ctrl – scrolling wheel), the following appears:

Pulled the bar down, scrolled back to the original format, and voilà:

Worked for both browsers. Incredible simple workaround in the end, quite an unexpected feature….

Regardz

About Post Author

Job Oprel

Until February 2019, Job worked as a solution architect at AMIS Services with a special interest in Oracle licensing, High Availability architectures and managing complex (Oracle) environments, which includes Cloud environments.With a background as Oracle developer, DBA, team-manager and license-consultant he is able to utilize the Oracle technologies to a cost-efficient architecture for his customers.He is regularly involved in consultancy regarding: - Unlimited License Agreements (ULA). - License compliancy-checks and advice regarding optimizing the environment. - Second opinions. - Education / presentations about licensing and managing your infrastructure in the most cost-efficient manner.Twitter: @jobaclenl

job.oprel@amis.nl

http://www.amis.nl