// remote peer will serve HTTP 500 when asked for prefix file
final int server1port = server1.getPort();
server1.stop();
server1 =
Server.withPort(server1port).serve("/.meta/prefixes.txt").withBehaviours(
new DeliverBehaviour(500, "text/plain", "Ugly server error"));
server1.start();
final Manager wm = lookup(Manager.class);
wm.updatePrefixFile(getRepositoryRegistry().getRepositoryWithFacet(PROXY1_REPO_ID, MavenRepository.class));
waitForRoutingBackgroundUpdates();