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Posted to issues@flink.apache.org by "Jark Wu (Jira)" <ji...@apache.org> on 2023/03/01 06:37:00 UTC

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

     [ https://issues.apache.org/jira/browse/FLINK-31268?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jark Wu reassigned FLINK-31268:
-------------------------------

    Assignee: Hang Ruan

> 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
>            Assignee: Hang Ruan
>            Priority: Major
>              Labels: pull-request-available
>
> 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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