Based on wikipedia, Catch-22 is " The archetypal Catch-22, as formulated by Heller, involves the case of John Yossarian, a U.S. Army Air Forces bombardier, who wishes to be grounded from combat flight. This will only happen if he is evaluated by the squadron's flight surgeon and found "unfit to fly." "Unfit" would be any pilot who is willing to fly such dangerous missions, as one would have to be mad to volunteer for possible death. However, to be evaluated, he must request the evaluation, an act that is considered sufficient proof for being declared sane. These conditions make it impossible to be declared "unfit.""
Do you find this have something to do with you? No idea? Have you find a job you want to do and it said" candidate must have 3 years experience". However, this 3 years experience can only be required when you first enter the job. This is catch 22. So don't be discouraged, when you see that, and you should recognize it is a catch.