我正在尝试使用下面的模式过滤flink中大于10的所有临时事件，

Pattern<MonitoringEvent, ?> warningPattern = Pattern.<MonitoringEvent>begin("first")
                .subtype(TemperatureEvent.class)
                .where(new FilterFunction<TemperatureEvent>() {
                    @Override
                    public boolean filter(TemperatureEvent temperatureEvent) throws Exception {
                        return temperatureEvent.getTemperature() > 50;
                    }
                });

输入是一个文本文件，由输入函数解析为流，即输入文件的内容are:-

1,98
2,33
3,44
4,55
5,66
6,88
7,99
8,76

这里第一个值是机架id，第二个值是温度
我在输入流和warnigsstream上都发布了print（），如下所示

inputEventStream.print();
warnings.print();

现在，问题来了，flink cep的输出如下所示

08/10/2017 23:43:15 Job execution switched to status RUNNING.
08/10/2017 23:43:15 Source: Custom Source -> Sink: Unnamed(1/1) switched to SCHEDULED 
08/10/2017 23:43:15 Source: Custom Source -> Sink: Unnamed(1/1) switched to DEPLOYING 
08/10/2017 23:43:15 AbstractCEPPatternOperator -> Map -> Sink: Unnamed(1/1) switched to SCHEDULED 
08/10/2017 23:43:15 AbstractCEPPatternOperator -> Map -> Sink: Unnamed(1/1) switched to DEPLOYING 
08/10/2017 23:43:15 AbstractCEPPatternOperator -> Map -> Sink: Unnamed(1/1) switched to RUNNING 
08/10/2017 23:43:15 Source: Custom Source -> Sink: Unnamed(1/1) switched to RUNNING 
Rack id = 1 and temprature = 98.0)
Rack id = 2 and temprature = 33.0)
Rack id = 3 and temprature = 44.0)
Rack id = 4 and temprature = 55.0)
Rack id = 5 and temprature = 66.0)
Rack id = 6 and temprature = 88.0)
Rack id = 7 and temprature = 99.0)
Rack id = 8 and temprature = 76.0)
08/10/2017 23:43:16 Source: Custom Source -> Sink: Unnamed(1/1) switched to FINISHED 
Rack id = 1 and temprature = 98.0)
Rack id = 8 and temprature = 76.0)
Rack id = 7 and temprature = 99.0)
Rack id = 6 and temprature = 88.0)
Rack id = 5 and temprature = 66.0)
Rack id = 4 and temprature = 55.0)
08/10/2017 23:43:16 AbstractCEPPatternOperator -> Map -> Sink: Unnamed(1/1) switched to FINISHED 
08/10/2017 23:43:16 Job execution switched to status FINISHED.

Process finished with exit code 0

如我们所见，第一个复杂事件（rack id=1和temperature=98.0）以相同的顺序打印，但是在此之后，temp>50的所有其他复杂事件以与输入流相反的顺序打印。

My questions are :-

1. Any idea why events are getting printed in reverse order?
2. Is there a custom way to print values{w/o using warnings.print()} of 
   warning stream, like can I print only temperature, rather than rack-id ?

提前谢谢