fix 追踪bug

panlei

2019-12-06 bf32a74cbb28405eb116495eb2046880ecfceb66

 ruleserver/server.go

@@ -43,6 +43,8 @@
      select {
      case dbMsg := <-videotapChan:
         publishMessage(dbMsg)
      default:
         time.Sleep(time.Millisecond * 10)
      }
   }
}