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https://issues.apache.org/jira/browse/KAFKA-20404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Canxuan Wang reassigned KAFKA-20404:
------------------------------------
Assignee: Canxuan Wang
> Investigate/Fix bulk-excluded SpotBugs atomicity warnings
> ----------------------------------------------------------
>
> Key: KAFKA-20404
> URL: https://issues.apache.org/jira/browse/KAFKA-20404
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Muralidhar Basani
> Assignee: Canxuan Wang
> Priority: Major
> Labels: concurrency, spotbugs
>
> When SpotBugs was upgraded, several streams classes were bulk-excluded for
> three new atomicity warning patterns.
> For ex: StreamThread class is added to exclusion list.
> [https://github.com/apache/kafka/blob/1bf7d6032b9b4171f510dc9a1c7e0243410e27f5/gradle/spotbugs-exclude.xml#L636]
> Check for Field lastCommitMs
> [https://github.com/apache/kafka/blob/1bf7d6032b9b4171f510dc9a1c7e0243410e27f5/streams/src/main/java/org/apache/kafka/streams/processor/internals/DefaultStateUpdater.java#L819]
>
> Each class needs individual investigation to determine whether the warning is
> a false positive or a real concurrency bug.
> Atomicity warnings to consider :
> AT_NONATOMIC_OPERATIONS_ON_SHARED_VARIABLE
> AT_NONATOMIC_64BIT_PRIMITIVE
> AT_STALE_THREAD_WRITE_OF_PRIMITIVE
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