Follow up: Fixed issue #1080 - Scheduler won't start because of missing DB connection on PostgreSQL 9.2.18.

app/models/scheduler.rb

@@ -12,8 +12,10 @@ class Scheduler < ApplicationModel
     Thread.abort_on_exception = true
 
     # reconnect in case db connection is lost
+    # See issue #1080
     begin
       ActiveRecord::Base.connection.reconnect!
+    rescue PG::UnableToSend => e # rubocop:disable Lint/HandleExceptions
     rescue => e
       logger.error "Can't reconnect to database #{e.inspect}"
     end