Jason Gustafson updated KAFKA-6768:
    Affects Version/s:     (was: 1.1.0)

> Producer may hang in close with pending transaction
> ---------------------------------------------------
>                 Key: KAFKA-6768
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6768
>             Project: Kafka
>          Issue Type: Bug
>          Components: producer 
>            Reporter: Jason Gustafson
>            Assignee: Jason Gustafson
>            Priority: Major
>             Fix For: 1.1.1
> There is an edge case for transactional producers which will cause close() to 
> hang indefinitely (unless used with a timeout). Say, for example, that the 
> producer is trying to send an AddPartitionsToTxn request to the broker. Upon 
> shutdown, the Sender's running flag will be set to false and we will begin 
> graceful shutdown. Graceful shutdown will not complete, however, until we can 
> send the AddPartitionsToTxn request. But the latter is blocked by the fact 
> that the running flag is disabled. So no progress can be made and shutdown 
> cannot complete.

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