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https://issues.apache.org/jira/browse/HBASE-25480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17261478#comment-17261478
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Andrey Elenskiy commented on HBASE-25480:
-----------------------------------------
Updated to major because it breaks observability of backup masters making it
look like there are none in Prometheus for example.
> NPE when getting metrics of backup master
> -----------------------------------------
>
> Key: HBASE-25480
> URL: https://issues.apache.org/jira/browse/HBASE-25480
> Project: HBase
> Issue Type: Brainstorming
> Components: master
> Affects Versions: 2.4.0
> Reporter: Andrey Elenskiy
> Priority: Major
>
> Getting NullPointerException in MetricsMasterWrapperImpl.getMergePlanCount()
> when getting metrics via JMX on backup master. It appears due to the fact
> that regionNormalizerManager is null in backup masters as it's only
> initialized by HMaster.finishActiveMasterInitialization().
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