失败消息：使用 apache flink 1.11 时检查点在完成之前已过期

Question

我最近在 kubernetes 集群中将我的 Apache Flink 升级到 1.11 版，但今天我发现一个任务检查点总是失败。该任务从 RabbitMQ 读取数据并计算结果并调用 HTTP 请求将数据保存到 MySQL。这是任务管理器错误日志输出：

2020-08-21 15:53:28
org.apache.flink.util.FlinkRuntimeException: Exceeded checkpoint tolerable failure threshold.
    at org.apache.flink.runtime.checkpoint.CheckpointFailureManager.handleJobLevelCheckpointException(CheckpointFailureManager.java:66)
    at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.abortPendingCheckpoint(CheckpointCoordinator.java:1626)
    at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.abortPendingCheckpoint(CheckpointCoordinator.java:1603)
    at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.access$600(CheckpointCoordinator.java:90)
    at org.apache.flink.runtime.checkpoint.CheckpointCoordinator$CheckpointCanceller.run(CheckpointCoordinator.java:1736)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

这是 Apache Flink UI 错误消息：

Failure Message: Checkpoint expired before completing.

作业总是在一段时间内重新启动。我有 2 个任务，另一个任务检查点保持成功。那么问题出在哪里，我应该怎么做才能解决这个问题？

这是我的 flink 配置：

 public static void initEnv(StreamExecutionEnvironment env) {
        env.setParallelism(1);
        env.enableCheckpointing(10000);
        env.getCheckpointConfig().setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
        env.getCheckpointConfig().setMinPauseBetweenCheckpoints(1000);
        env.getCheckpointConfig().setCheckpointTimeout(10000);
        env.getCheckpointConfig().setMaxConcurrentCheckpoints(1);
        env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
        env.getCheckpointConfig().enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
        StateBackend stateBackend = new FsStateBackend("file:///opt/flink/data");
        env.setStateBackend(stateBackend);
    }

Answer 1

尝试增加检查点的超时时间：

public static void initEnv(StreamExecutionEnvironment env) {
        env.setParallelism(1);
        env.enableCheckpointing(120000);
        env.getCheckpointConfig().setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
        env.getCheckpointConfig().setMinPauseBetweenCheckpoints(1000);
        env.getCheckpointConfig().setCheckpointTimeout(120000);
        env.getCheckpointConfig().setMaxConcurrentCheckpoints(1);
        env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
        env.getCheckpointConfig().enableExternalizedCheckpoints(CheckpointConfig.ExternalizedCheckpointCleanup.RETAIN_ON_CANCELLATION);
        StateBackend stateBackend = new FsStateBackend("file:///opt/flink/data");
        env.setStateBackend(stateBackend);
    }