Hi everyone, In some of my jobs, I occasionally encounter the problem, that some of the task managers lose the heartbeat connection to the job manager. The jobmanager did not crash, though. Here an excerpt from the dashboard:
Error: java.lang.Exception: TaskManager lost heartbeat connection to JobManager at org.apache.flink.runtime.taskmanager.TaskManager.registerAndRunHeartbeatLoop(TaskManager.java:847) at org.apache.flink.runtime.taskmanager.TaskManager.access$000(TaskManager.java:109) at org.apache.flink.runtime.taskmanager.TaskManager$1.run(TaskManager.java:365) I am not sure if this is a bug. I rather figure that the network or jobmanager workload is too high, so that somehow the heartbeats do not arrive (on time), but that's a mere guess. A first step for me could be to increase the heartbeat interval. Has anyone of you encountered this problem or do you have any ideas on how to avoid this issue? Thanks, Sebastian
