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https://issues.apache.org/jira/browse/KAFKA-3855?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Damian Guy reassigned KAFKA-3855:
---------------------------------

    Assignee: Damian Guy

> Guard race conditions in TopologyBuilder
> ----------------------------------------
>
>                 Key: KAFKA-3855
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3855
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>            Reporter: Guozhang Wang
>            Assignee: Damian Guy
>              Labels: architecture
>
> The user specified {{TopologyBuilder}} is shared among all stream threads to 
> build the processor topology instance, one for each thread. It public 
> functions that can be accessed by the threads is not synchronized, and we 
> need to double check if it could cause race conditions, and if yes guard 
> against these concurrent access.



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