public static void playDead(DistributedSystem sys) {
    try {
      getDistribution(sys).playDead();
    } catch (CancelException e) {
      // really dead is as good as playing dead
    }
  }
inhibit failure detection responses. This can be used in conjunction with beSickMember
geode-dunit/src/main/java/org/apache/geode/distributed/internal/membership/api/MembershipManagerHelper.java