503 – service unavailable oracle apexBy Shadab Mohammad • Jan 22, 2019 • No commentsThis error usually would come up on your APEX/ORDS instance if the user apex_public_user has expired. The quickest solution is…Share this:Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on WhatsApp (Opens in new window)