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https://issues.apache.org/jira/browse/FLINK-8876?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephan Ewen resolved FLINK-8876.
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Resolution: Fixed
Fixed by resolving all sub-issues
> Improve concurrent access handling in stateful serializers
> ----------------------------------------------------------
>
> Key: FLINK-8876
> URL: https://issues.apache.org/jira/browse/FLINK-8876
> Project: Flink
> Issue Type: Improvement
> Components: Core
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Priority: Major
> Fix For: 1.5.0, 1.6.0
>
>
> Some stateful serializers produce incorrect results when accidentally
> accessed by multiple threads concurrently.
> To better catch these cases, I suggest to add concurrency checks that are
> active only when debug logging is enabled, and during test runs.
> This is inspired by Kryo's checks for concurrent access.
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