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https://issues.apache.org/jira/browse/KAFKA-14417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Gustafson resolved KAFKA-14417.
-------------------------------------
    Fix Version/s: 4.0.0
                   3.3.2
       Resolution: Fixed

> Producer doesn't handle REQUEST_TIMED_OUT for InitProducerIdRequest, treats 
> as fatal error
> ------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-14417
>                 URL: https://issues.apache.org/jira/browse/KAFKA-14417
>             Project: Kafka
>          Issue Type: Task
>    Affects Versions: 3.1.0, 3.0.0, 3.2.0, 3.3.0, 3.4.0
>            Reporter: Justine Olshan
>            Assignee: Justine Olshan
>            Priority: Blocker
>             Fix For: 4.0.0, 3.3.2
>
>
> In TransactionManager we have a handler for InitProducerIdRequests 
> [https://github.com/apache/kafka/blob/19286449ee20f85cc81860e13df14467d4ce287c/clients/src/main/java/org/apache/kafka/clients/producer/internals/TransactionManager.java#LL1276C14-L1276C14]
> However, we have the potential to return a REQUEST_TIMED_OUT error in 
> RPCProducerIdManager when the BrokerToControllerChannel manager times out: 
> [https://github.com/apache/kafka/blob/19286449ee20f85cc81860e13df14467d4ce287c/core/src/main/scala/kafka/coordinator/transaction/ProducerIdManager.scala#L236]
>  
> or when the poll returns null: 
> [https://github.com/apache/kafka/blob/19286449ee20f85cc81860e13df14467d4ce287c/core/src/main/scala/kafka/coordinator/transaction/ProducerIdManager.scala#L170]
> Since REQUEST_TIMED_OUT is not handled by the producer, we treat it as a 
> fatal error and the producer fails. With the default of idempotent producers, 
> this can cause more issues.
> See this stack trace from 3.0:
> {code:java}
> ERROR [Producer clientId=console-producer] Aborting producer batches due to 
> fatal error (org.apache.kafka.clients.producer.internals.Sender)
> org.apache.kafka.common.KafkaException: Unexpected error in 
> InitProducerIdResponse; The request timed out.
>       at 
> org.apache.kafka.clients.producer.internals.TransactionManager$InitProducerIdHandler.handleResponse(TransactionManager.java:1390)
>       at 
> org.apache.kafka.clients.producer.internals.TransactionManager$TxnRequestHandler.onComplete(TransactionManager.java:1294)
>       at 
> org.apache.kafka.clients.ClientResponse.onComplete(ClientResponse.java:109)
>       at 
> org.apache.kafka.clients.NetworkClient.completeResponses(NetworkClient.java:658)
>       at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:650)
>       at 
> org.apache.kafka.clients.producer.internals.Sender.maybeSendAndPollTransactionalRequest(Sender.java:418)
>       at 
> org.apache.kafka.clients.producer.internals.Sender.runOnce(Sender.java:316)
>       at 
> org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:256)
>       at java.lang.Thread.run(Thread.java:748)
> {code}
> Seems like the commit that introduced the changes was this one: 
> [https://github.com/apache/kafka/commit/72d108274c98dca44514007254552481c731c958]
>  so we are vulnerable when the server code is ibp 3.0 and beyond.
>  



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