Earlier quoted context omitted.
I think that means those MEPs are not doing their jobs. They are the representatives of their people, but somehow they left for vacation before the last day of the session. They failed in the most important part of their duty.
Around ten years ago I watched some MEPs on YouTube talk about their jobs. A lot of them were scathing. The EP isn't a real parliament and the people in it don't have any real power, so it fills up with cheerleaders and hecklers. Attendance isn't just low before the summer break, it's low all the time. MEPs miss votes for reasons as trivial as there being a football game on, because why not? It's not like their votes…
The Council, made up of heads of state, set the direction.
The Commission, made up of whoever is nominated by those heads of state, usually some mate of theirs with no democratic accountability or mandate of their own (see: Peter Mandelson), is the body that decides on and creates legislation.
The Parliament, made up of the actually elected members, seems to exist just to rubber-stamp the output of the other bodies. Or occasionally not, but look what happened here, they were asked again until they did * .
Don't get me wrong, I think there's a lot that's good about the EU too, but it's in need of serious reform before it can claim to be a truly democratic set of bodies.
(* Which is incidentally another criticism of the EU, mostly centred around the time of the Lisbon treaty, which was first put forward as the new EU constitution but, after rejection in some popular referenda in some countries, was renamed the Lisbon Treaty and pushed through again. In the UK this caused waves because the populace was not asked at all about the treaty and Gordon Brown was reported to have snuck-off and signed it into law on the quiet)