ORA Database Error Messages ORA-16501: the Data Guard broker operation failed September 30, 2015 mpbod ORA-16501: the Data Guard broker operation failed Cause: The Data Guard broker operation failed. Action: See accompanying messages for details. Back to previous menu Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)