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https://issues.apache.org/jira/browse/SPARK-53398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18016893#comment-18016893
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Anish Shrigondekar commented on SPARK-53398:
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PR merged here: https://github.com/apache/spark/pull/52144
> Ensure that RocksDBMemoryManager metrics reporting doesn't throw a
> NullPointerException
> ---------------------------------------------------------------------------------------
>
> Key: SPARK-53398
> URL: https://issues.apache.org/jira/browse/SPARK-53398
> Project: Spark
> Issue Type: Improvement
> Components: Structured Streaming
> Affects Versions: 4.1.0
> Reporter: Eric Marnadi
> Priority: Major
> Labels: pull-request-available
>
> If the RocksDB instance is unregistered from the memory manager via
> maintenance, then metrics are called on the same instance, then we will throw
> an NPE, which will fail the query, from the RocksDBMemoryManager metrics
> reporting path. We can handle this by appending a UUID to the uniqueId we
> pass to RocksDB and using getOrDefault in the Memory Manager.
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