使用Apache Flink创建CEP

Question

我正在尝试为Kafka输入流实现一个非常简单的Apache Flink CEP。Kafka生产者生成一个简单的Double值，并通过Kafka主题将它们作为字符串发送给消费者。目前，我正在用Flink编码一个CEP消费者。到目前为止，这是我编写的代码：

public static void main(String[] args) throws Exception {

        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.getConfig().disableSysoutLogging();
        env.getConfig().setRestartStrategy(RestartStrategies.fixedDelayRestart(4, 10000)); 
        env.setParallelism(3);
        Properties properties = new Properties();
        properties.setProperty("bootstrap.servers", "localhost:9092");
        properties.setProperty("group.id", "flink_consumer");

        DataStream<String> stream = env
                .addSource(new FlinkKafkaConsumer09<>("temp", new SimpleStringSchema(), properties));

        Pattern<String, ?> warning= Pattern.<String>begin("first")
                .where(new IterativeCondition<String>() {
                    private static final long serialVersionUID = 1L;
                    @Override
                    public boolean filter(String value, Context<String> ctx) throws Exception {
                        return Double.parseDouble(value) >= 89.0;
                    }
                })
                .next("second")
                .where(new IterativeCondition<String>() {
                    private static final long serialVersionUID = 1L;
                    @Override
                    public boolean filter(String value, Context<String> ctx) throws Exception {
                        return Double.parseDouble(value) >= 89.0;
                    }
                })
                .within(Time.seconds(10));  
        DataStream<String> temp = CEP.pattern(stream, warning).select(new PatternSelectFunction<String, String>() {
            private static final long serialVersionUID = 1L;

            @Override
            public String select(Map<String, List<String>> pattern) throws Exception {
                List warnung1 = pattern.get("first");
                String first = (String) warnung1.get(1);
                return first;
            }   

        });

        temp.print();
        env.execute();

    }

如果我正在尝试执行这段代码，这是一条错误消息：

编辑：我尝试了另一个例子，每次执行我都得到相同的错误。所以我觉得我的包裹有问题？

Answer 1

在Flink1.6.0中，我的代码工作得非常好。