static boolean isSuspectedFailureCredible(String instanceName) {
   long timeNow = System.currentTimeMillis();
   Long suspectedFailureTimeMillis = (Long) suspectedFailures.get((String) instanceName);
   if (suspectedFailureTimeMillis != null) {
     removeSuspectedFailure(instanceName);
     if ((timeNow - suspectedFailureTimeMillis.longValue()) < 6000) {
       System.out.println("credible suspected failure of " + instanceName);
       return true;
     } else {
       System.out.println("suspected failure is not pending or more than 6 sec old");
       // add the new suspected failure
       addSuspectedFailure(instanceName);
       return false;
     }
   } else {
     // this is the first suspected failure - adding it
     System.out.println(
         "Received Suspected Failure Notification: adding suspected failure for" + instanceName);
     addSuspectedFailure(instanceName);
     return false;
   }
 }
 static void addSuspectedFailure(String instanceName) {
   suspectedFailures.put(instanceName, new Long(System.currentTimeMillis()));
 }