嘿，我这里使用flink on yarn中，经常报出异常，然后flink就自己关闭了。
里面具体的逻辑是从kafka中接收数据，然后按照enentTime中的window滑动窗口滑动， 窗口大小为1小时，滑动间隔是5秒。聚集数据后，就写到redis中。 一般运行了2个小时候，就报异常，然后就结束了任务。其中，jobmanager的日志中显 示为： java.util.concurrent.TimeoutException: Heartbeat of TaskManager with id container_e23_1545597259276_0273_01_001220 timed out. at org.apache.flink.runtime.jobmaster.JobMaster$TaskManagerHeartbeatListener.no tifyHeartbeatTimeout(JobMaster.java:1624) at org.apache.flink.runtime.heartbeat.HeartbeatManagerImpl$HeartbeatMonitor. run(HeartbeatManagerImpl.java:339) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.apache.flink.runtime.concurrent.akka.ActorSystemScheduledExecutorAdapter $ScheduledFutureTask.run(ActorSystemScheduledExecutorAdapter.java:154) at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:39) at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDis patcher.scala:415) at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1 339) at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java :107) 这里面显示taskmanager超时了，但是在taskmanager对应的日志中，是没有具体的异常 的。请问这个是什么原因导致的呢?
