ming li created FLINK-18451:
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Summary: Flink HA on yarn may appear TaskManager double running
when HA is restored
Key: FLINK-18451
URL: https://issues.apache.org/jira/browse/FLINK-18451
Project: Flink
Issue Type: Bug
Components: Deployment / YARN
Affects Versions: 1.9.0
Reporter: ming li
We found that when NodeManager is lost, the new JobManager will be restored by
Yarn's ResourceManager, and the Leader node will be registered on Zookeeper.
The original TaskManager will find the new JobManager through Zookeeper and
close the old JobManager connection. At this time, all tasks of the TaskManager
will fail. The new JobManager will directly perform job recovery and recover
from the latest checkpoint.
However, during the recovery process, when a TaskManager is abnormally
connected to Zookeeper, it is not registered with the new JobManager in time.
Before the following timeout:
1. Connect with Zookeeper
2. Heartbeat with JobManager/ResourceManager
Task will continue to run (assuming that Task can run independently in
TaskManager). Assuming that HA recovers fast enough, some Task double runs will
occur at this time.
Do we need to make a persistent record of the cluster resources we allocated
during the runtime, and use it to judge all Task stops when HA is restored?
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