public static void startSender(String senderId) {
    final IgnoredException exln = addIgnoredException("Could not connect");

    IgnoredException exp =
        addIgnoredException(ForceReattemptException.class.getName());
    IgnoredException exp1 =
        addIgnoredException(InterruptedException.class.getName());
    try {
      GatewaySender sender = getGatewaySender(senderId);
      sender.start();
    } finally {
      exp.remove();
      exp1.remove();
      exln.remove();
    }

  }
Returns a Map that contains the count for number of cache server and number of Receivers.
geode-wan/src/distributedTest/java/org/apache/geode/internal/cache/wan/WANTestBase.java