ar.rb

module ActiveRecord
  module ConnectionAdapters
    class ConnectionPool
      class Queue

        # Waits on the queue up to +timeout+ seconds, then removes and
        # returns the head of the queue.
        def wait_poll(timeout)
          @num_waiting += 1

          t0 = Time.now
          elapsed = 0
          loop do
            @cond.wait(timeout - elapsed)

            return remove if any?

            elapsed = Time.now - t0
            if elapsed >= timeout
              msg = 'could not obtain a database connection within %0.3f seconds (waited %0.3f seconds)' %
                [timeout, elapsed]
              raise ConnectionTimeoutError, msg
            end
          end
        ensure
          @num_waiting -= 1
        end

        # The original method is above. This is the "fix"
        def wait_poll(timeout)
        end

      end
    end
  end
end