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https://issues.apache.org/jira/browse/KAFKA-5147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16025552#comment-16025552
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ASF GitHub Bot commented on KAFKA-5147:
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Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/3132
> KafkaProducer's TransactionManager needs a review on synchronization
> --------------------------------------------------------------------
>
> Key: KAFKA-5147
> URL: https://issues.apache.org/jira/browse/KAFKA-5147
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Apurva Mehta
> Assignee: Apurva Mehta
> Priority: Blocker
> Labels: exactly-once
> Fix For: 0.11.0.0, 0.11.1.0
>
>
> Currently, the completion handlers are not synchronized, though they access
> shared state like `partitionsInTransaction`, and `lastError`,
> `pendingPartitionsToBeaddedToTransaction`, etc.
> We should either make the collections concurrent or synchronize the handlers.
> In general, we need to review this code to ensure that the synchronization is
> correct.
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