wrap download file in try statement for connectivity problem
wrap download file in try statement for connectivity problem


Former-commit-id: e4aaa063d507f2d13041effab3b0e4f7f2e579f6
Former-commit-id: ff76adef3a259fa36698bd10022191a5fef8d9c8 [formerly c739f0f06b71fb337e312ad4598281b0e55b25a8]
Former-commit-id: a65a746d465b743ee5a32135322fbf1417270cc3
interrogator/corpkit,interrogator/corpkit