[jira] [Resolved] (KAFKA-9830) DeadLetterQueueReporter leaks KafkaProducer instance

["Konstantine Karantasis (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-9830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantine Karantasis resolved KAFKA-9830.
-------------------------------------------
    Resolution: Fixed

> DeadLetterQueueReporter leaks KafkaProducer instance
> ----------------------------------------------------
>
>                 Key: KAFKA-9830
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9830
>             Project: Kafka
>          Issue Type: Bug
>          Components: KafkaConnect
>    Affects Versions: 2.0.0
>            Reporter: Greg Harris
>            Assignee: Greg Harris
>            Priority: Major
>             Fix For: 2.5.1
>
>
> The DeadLetterQueueReporter (introduced by KAFKA-6738) creates a KafkaProducer to report errors to Kafka, but does not clean up the producer, leaving many idle network threads open after tasks are stopped.
> Reproduction steps:
> Start a task that has a non-empty DLQ topic name
> Stop the task
> Observe the list of running threads
> Expected result:
> There is no thread related to the stopped task's DLQ left running
> Actual result:
> There is a thread named something like kafka-producer-network-thread | connector-dlq-producer-task-0" #1234 left running



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