cleanup, and get rid of unnecessary timeouts in two places

templates/test/cpp/naming/resolver_component_tests_defs.include

@@ -41,7 +41,7 @@ argp.add_argument('--tcp_connect_bin_path', default=None, type=str,
 args = argp.parse_args()
 
 def test_runner_log(msg):
-  sys.stderr.write('%s: %s\n' % (__file__, msg))
+  sys.stderr.write('\n%s: %s\n' % (__file__, msg))
 
 cur_resolver = os.environ.get('GRPC_DNS_RESOLVER')
 if cur_resolver and cur_resolver != 'ares':

test/cpp/naming/resolver_component_tests_runner.py

@@ -41,7 +41,7 @@ argp.add_argument('--tcp_connect_bin_path', default=None, type=str,
 args = argp.parse_args()
 
 def test_runner_log(msg):
-  sys.stderr.write('%s: %s\n' % (__file__, msg))
+  sys.stderr.write('\n%s: %s\n' % (__file__, msg))
 
 cur_resolver = os.environ.get('GRPC_DNS_RESOLVER')
 if cur_resolver and cur_resolver != 'ares':

test/cpp/naming/utils/dns_resolver.py

@@ -22,10 +22,6 @@ import twisted.internet.task as task
 import twisted.names.client as client
 import twisted.internet.reactor as reactor
 
-def exit_after_timeout(timeout):
-  time.sleep(timeout)
-  print('Time limit reached. Forcing exit')
-  reactor.stop()
 
 def main():
   argp = argparse.ArgumentParser(description='Make DNS queries for A records')
@@ -48,10 +44,6 @@ def main():
     deferred_result = resolver.lookupAddress(args.qname)
     deferred_result.addCallback(OnResolverResultAvailable)
     return deferred_result
-  # We can't use sigalarm on windows, so start a thread.
-  timeout_thread = threading.Thread(target=exit_after_timeout, args=[args.timeout])
-  timeout_thread.setDaemon(True)
-  timeout_thread.start()
   task.react(BeginQuery, [args.qname])
 
 if __name__ == '__main__':

test/cpp/naming/utils/dns_server.py

@@ -112,15 +112,12 @@ def start_local_dns_server(args):
   twisted.internet.reactor.suggestThreadPoolSize(1)
   twisted.internet.reactor.run()
 
-def shutdown_process():
+def _quit_on_signal(signum, _frame):
+  print('Received SIGNAL %d. Quitting with exit code 0' % signum)
   twisted.internet.reactor.stop()
   sys.stdout.flush()
   sys.exit(0)
 
-def _quit_on_signal(signum, _frame):
-  print('Received SIGNAL %d. Quitting with exit code 0' % signum)
-  shutdown_process()
-
 def flush_stdout_loop():
   num_timeouts_so_far = 0
   sleep_time = 1
@@ -131,7 +128,7 @@ def flush_stdout_loop():
     time.sleep(sleep_time)
     num_timeouts_so_far += 1
   print('Process timeout reached, or cancelled. Exitting 0.')
-  shutdown_process()
+  os.kill(os.getpid(), signal.SIGTERM)
 
 def main():
   argp = argparse.ArgumentParser(description='Local DNS Server for resolver tests')

test/cpp/naming/utils/tcp_connect.py

@@ -21,12 +21,6 @@ import threading
 import time
 import sys
 
-connect_success = False
-
-def try_connect(args):
-  socket.create_connection([args.server_host, args.server_port])
-  global connect_success
-  connect_success = True
 
 def main():
   argp = argparse.ArgumentParser(description='Open a TCP handshake to a server')
@@ -37,13 +31,7 @@ def main():
   argp.add_argument('-t', '--timeout', default=1, type=int,
                     help='Force process exit after this number of seconds.')
   args = argp.parse_args()
-  t = threading.Thread(target=try_connect, args=[args])
-  t.setDaemon(True)
-  t.start()
-  # We can't use sigalarm on windows, so join with a timeout.
-  t.join(timeout=args.timeout)
-  if t.isAlive() or not connect_success:
-    sys.exit(1)
+  socket.create_connection([args.server_host, args.server_port])
 
 if __name__ == '__main__':
   main()