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");}});@ClassRulepublic static MiniClusterWithClientResource flinkCluster =new MiniClusterWithClientResource(new MiniClusterResourceConfiguration.Builder().setConfiguration(config).setNumberSlotsPerTaskManager(1).setNumberTaskManagers(3).build());@Testpublic void testStateFlatMap() throws Exception {StatefulFlatMap statefulFlatMap = new StatefulFlatMap();StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();// configure your test environmentenv.setParallelism(2);// values are collected in a static variableCollectSink.values.clear();// create a stream of custom elements and apply transformationsenv.fromElements("world", "hi").keyBy(e -> "1").flatMap(statefulFlatMap).addSink(new CollectSink());// executeenv.execute();// verify your resultsassertTrue(CollectSink.values.containsAll(Lists.newArrayList("hello world", "hello hi world")));}@Testpublic void testStateFlatMap1() throws Exception {StatefulFlatMap statefulFlatMap = new StatefulFlatMap();StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();// configure your test environmentenv.setParallelism(2);// values are collected in a static variableCollectSink.values.clear();// create a stream of custom elements and apply transformationsenv.fromElements("world", "hi", "world").keyBy(e -> e).flatMap(statefulFlatMap).addSink(new CollectSink());// executeenv.execute();// verify your resultsassertTrue(CollectSink.values.containsAll(Lists.newArrayList("hello world", "hello hi", "hello world world")));}// create a testing sinkprivate static class CollectSink implements SinkFunction<String> {// must be staticpublic static final List<String> values = Collections.synchronizedList(new ArrayList<>());@Overridepublic void invoke(String value, Context context) throws Exception {values.add(value);}}}