[jira] [Assigned] (KAFKA-6310) ConcurrentModificationException when reporting requests-in-flight in producer

["Charly Molter (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-6310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Charly Molter reassigned KAFKA-6310:
------------------------------------

    Assignee: Charly Molter

> ConcurrentModificationException when reporting requests-in-flight in producer
> -----------------------------------------------------------------------------
>
>                 Key: KAFKA-6310
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6310
>             Project: Kafka
>          Issue Type: Bug
>          Components: metrics, network
>    Affects Versions: 1.0.0
>            Reporter: Charly Molter
>            Assignee: Charly Molter
>
> We are running in an issue really similar to KAFKA-4950.
> We have a producer running and a MetricsReporter with a background thread which publishes these metrics.
> The concurrent exception happens when calling `InFlightRequests.count()` in one thread when a connection or disconnection is happening.
> In this case one thread is iterating over the map while another is adding/removing from it thus causing the exception.
> We could potentially fix this with a volatile like in KAFKA-4950.



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