error appears in oozie-site.xml
just hit backspace a couple of times and leave one white space
This is a known issue mentioned as BUG-46934. Fixed in future release of Ambari.
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This is being tracked by AMBARI-13629 fixed in Ambari 18.104.22.168.
I landed on the same issue. Adding this setting to make this searchable since you have this in an image. oozie.authentication.kerberos.name.rules