patch is not Data Guard Standby First Installable
Patch 22139245 - Oracle JavaVM Component 11.2.0.4.160119 Database PSU (Jan2016)
Readme says: "This patch is not Data Guard Standby First Installable."
I don't know what that means. Is it defined somewhere how the patch is to be applied to a primary and DG standby? Doesn't seem to be covered in the readme.