Program: 54206
Project: 54206
Buggy source:
public final void start(){
  monitorSite=config.getParameter("String_Node_Str");
  if (StringUtils.isEmpty(monitorSite)) {
    return;
  }
  monitorSite=removeLastSplit(monitorSite);
  interval=config.getParameter("String_Node_Str",1);
  try {
    if (start.compareAndSet(false,true)) {
      collectScheduledFuture=collectScheduleExecutor.scheduleWithFixedDelay(new Runnable(){
        @Override public void run(){
          Calendar calendar=Calendar.getInstance();
          int minute=calendar.get(Calendar.MINUTE);
          try {
            if (preMinute == null) {
              preMinute=minute;
              return;
            }
            int diff=minute - preMinute;
            diff=diff < 0 ? diff + 60 : diff;
            if (diff != 0 && diff % interval == 0) {
              try {
                MonitorData monitorData=collectMonitorData();
                long seconds=SystemClock.now() / 1000;
                seconds=seconds - (seconds % 60);
                seconds=seconds - interval * 60;
                monitorData.setTimestamp(seconds * 1000);
                monitorData.setJvmMonitorData(JVMCollector.collect());
                report(monitorData);
                checkSendJVMInfo();
              }
  finally {
                preMinute=minute;
              }
            }
          }
 catch (          Throwable t) {
            LOGGER.error("String_Node_Str",t);
          }
        }
      }
,1,1,TimeUnit.SECONDS);
      JVMMonitor.start();
      checkSendJVMInfo();
      LOGGER.info("String_Node_Str");
    }
  }
 catch (  Exception e) {
    LOGGER.error("String_Node_Str",e);
  }
}

Fixed version (ground truth):
public final void start(){
  JVMMonitor.start();
  monitorSite=config.getParameter("String_Node_Str");
  if (StringUtils.isEmpty(monitorSite)) {
    return;
  }
  monitorSite=removeLastSplit(monitorSite);
  interval=config.getParameter("String_Node_Str",1);
  try {
    if (start.compareAndSet(false,true)) {
      collectScheduledFuture=collectScheduleExecutor.scheduleWithFixedDelay(new Runnable(){
        @Override public void run(){
          Calendar calendar=Calendar.getInstance();
          int minute=calendar.get(Calendar.MINUTE);
          try {
            if (preMinute == null) {
              preMinute=minute;
              return;
            }
            int diff=minute - preMinute;
            diff=diff < 0 ? diff + 60 : diff;
            if (diff != 0 && diff % interval == 0) {
              try {
                MonitorData monitorData=collectMonitorData();
                long seconds=SystemClock.now() / 1000;
                seconds=seconds - (seconds % 60);
                seconds=seconds - interval * 60;
                monitorData.setTimestamp(seconds * 1000);
                monitorData.setJvmMonitorData(JVMCollector.collect());
                report(monitorData);
                checkSendJVMInfo();
              }
  finally {
                preMinute=minute;
              }
            }
          }
 catch (          Throwable t) {
            LOGGER.error("String_Node_Str",t);
          }
        }
      }
,1,1,TimeUnit.SECONDS);
      checkSendJVMInfo();
      LOGGER.info("String_Node_Str");
    }
  }
 catch (  Exception e) {
    LOGGER.error("String_Node_Str",e);
  }
}