flink的异常concurrent.TimeoutException: Heartbeat of TaskManager with id的解决

背景

在使用flink进行集成测试时，我们会使用MiniClusterWithClientResource类，但是当我们断点导致在某个方法执行的时间比较长时，会有错误发生，那么该如何解决这个错误呢？

处理concurrent.TimeoutException: Heartbeat of TaskManager with id错误

其实关键的配置是heartbeat.timeout，这个错误是JobManager抛出的，意思是和某个TaskManager的心跳中断超过了指定的时间，我们把这个参数配置到MiniClusterWithClientResource类中就可以了，代码如下所示：

public class FlinkIntegrationTest {

    public static final Configuration config = Configuration.fromMap(new HashMap<String, String>() {
        {
            put("heartbeat.timeout", "300000");
        }
    });

    @ClassRule
    public static MiniClusterWithClientResource flinkCluster =
            new MiniClusterWithClientResource(new MiniClusterResourceConfiguration.Builder().setConfiguration(config)
                    .setNumberSlotsPerTaskManager(1).setNumberTaskManagers(3).build());

    @Test
    public void testStateFlatMap() throws Exception {
        StatefulFlatMap statefulFlatMap = new StatefulFlatMap();
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        // configure your test environment
        env.setParallelism(2);

        // values are collected in a static variable
        CollectSink.values.clear();

        // create a stream of custom elements and apply transformations
        env.fromElements("world", "hi").keyBy(e -> "1").flatMap(statefulFlatMap).addSink(new CollectSink());

        // execute
        env.execute();

        // verify your results
        assertTrue(CollectSink.values.containsAll(Lists.newArrayList("hello world", "hello hi world")));
    }

    @Test
    public void testStateFlatMap1() throws Exception {
        StatefulFlatMap statefulFlatMap = new StatefulFlatMap();
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        // configure your test environment
        env.setParallelism(2);

        // values are collected in a static variable
        CollectSink.values.clear();

        // create a stream of custom elements and apply transformations
        env.fromElements("world", "hi", "world").keyBy(e -> e).flatMap(statefulFlatMap).addSink(new CollectSink());

        // execute
        env.execute();

        // verify your results
        assertTrue(CollectSink.values.containsAll(Lists.newArrayList("hello world", "hello hi", "hello world world")));
    }



    // create a testing sink
    private static class CollectSink implements SinkFunction<String> {

        // must be static
        public static final List<String> values = Collections.synchronizedList(new ArrayList<>());

        @Override
        public void invoke(String value, Context context) throws Exception {
            values.add(value);
        }
    }


}