"Kyoko Noro" <kyouko(dot)noro(at)hp(dot)com> writes: > Sometimes pqSocketCheck doesn't return and our appication hang. pqSocketCheck isn't accessible from outside libpq, and furthermore it's often called with the *intention* of waiting for something to happen. You need to provide more details of what you are doing and what is happening (vs. what you expected to happen). regards, tom lane