[jira] [Commented] (KAFKA-8726) Producer can't abort a transaction aftersome send errors

["Prashant Waykar (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-8726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17040156#comment-17040156 ] 

Prashant Waykar commented on KAFKA-8726:
----------------------------------------

I am seeing the same exceptions. 

> Producer can't abort a transaction aftersome send errors
> --------------------------------------------------------
>
>                 Key: KAFKA-8726
>                 URL: https://issues.apache.org/jira/browse/KAFKA-8726
>             Project: Kafka
>          Issue Type: Bug
>          Components: clients, producer 
>    Affects Versions: 2.3.0
>            Reporter: Mattia Barbon
>            Priority: Major
>
> I am following the producer with transactions example in [https://kafka.apache.org/23/javadoc/org/apache/kafka/clients/producer/KafkaProducer.html,] and on kafkaException, I use abortTransaction and retry.
>  
> In some cases, abortTransaction fails, with:
> ```
> org.apache.kafka.common.KafkaException: Cannot execute transactional method because we are in an error state
> ```
> as far as I can tell, this is caused by
> ```
> org.apache.kafka.common.KafkaException: The client hasn't received acknowledgment for some previously sent messages and can no longer retry them. It isn't safe to continue.
> ```
>  
> Since both are KafkaException, the example seems to imply they are retriable, but they seem not to be. Ideally, I would expect abortTransaction to succeed in this case (the broker will abort the transaction anyway because it can't be committed), but at the very least, I would expect to have a way to determine that the producer is unusable and it can't recover.



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