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https://issues.apache.org/jira/browse/FLINK-32217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lijie Wang closed FLINK-32217.
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Resolution: Fixed
> Retain metric store can cause NPE
> ----------------------------------
>
> Key: FLINK-32217
> URL: https://issues.apache.org/jira/browse/FLINK-32217
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Metrics, Runtime / REST
> Affects Versions: 1.17.0
> Reporter: Junrui Li
> Assignee: Junrui Li
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.18.0, 1.16.3, 1.17.2
>
>
> When metricsFetcher fetches metrics, it will update the metricsStore
> ([here|https://github.com/apache/flink/blob/d6c3d332340922c24d1af9dd8835d0bf790184b5/flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/legacy/metrics/MetricStore.java#LL91C44-L91C44]).
> But in this method, it can get null metricStore and cause NPE, which will
> lead to incorrect results of metrics retain, and we should also fix it from
> the perspective of stability.
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