By default, Cloudera Manager does not have the Oozie web console enabled.
The following error occurs when opening the Oozie Web UI:
http://172.16.29.10:11000/oozie/
Oozie web console is disabled.
To enable Oozie web consoleinstall the Ext JS library.
Oozie web console startup method:
Start Oozie Server Web Console Using CM
1. Download ext-2.2 and extract it to the /var/lib/oozie/ directory
2. Log in to Cloudera Manager to Oozie with the admin account
3. Start the console
save Changes
4. Restart the Oozie service
refer to: