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Posted to issues@flink.apache.org by "Hang Ruan (Jira)" <ji...@apache.org> on 2023/03/01 03:48:00 UTC

[jira] [Created] (FLINK-31268) OperatorCoordinator.Context#metricGroup will return null when restore from a savepoint

Hang Ruan created FLINK-31268:
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             Summary: OperatorCoordinator.Context#metricGroup will return null when restore from a savepoint
                 Key: FLINK-31268
                 URL: https://issues.apache.org/jira/browse/FLINK-31268
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Metrics
            Reporter: Hang Ruan


The `metricGroup` is initialized lazily in the method `OperatorCoordinatorHandler#initializeOperatorCoordinators`.

This will cause the NullPointerException when we use it in the method like `Source#restoreEnumerator`, which will be invoked through `SchedulerBase#createAndRestoreExecutionGraph` before `OperatorCoordinatorHandler#initializeOperatorCoordinators` in class `SchedulerBase#<init>`.



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