[jira] [Commented] (KAFKA-13679) Superfluous node disconnected log messages

["tooptoop4 (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-13679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17564656#comment-17564656 ] 

tooptoop4 commented on KAFKA-13679:
-----------------------------------

this might be some of what I see in https://github.com/confluentinc/kafka-images/issues/172

> Superfluous node disconnected log messages
> ------------------------------------------
>
>                 Key: KAFKA-13679
>                 URL: https://issues.apache.org/jira/browse/KAFKA-13679
>             Project: Kafka
>          Issue Type: Bug
>          Components: clients
>    Affects Versions: 3.1.0
>            Reporter: Philip Bourke
>            Priority: Minor
>
> In Kafka 3.1 the "{_}Node x disconnected{_}" log message in the {{NetworkClient.java}} class was changed from DEBUG to INFO - [https://github.com/apache/kafka/commit/79d97bd29d059e8ba8ee7726b49d76e03e281059#diff-dcc1af531d191de8da1e23ad6d878a3efc463ba4670dbcf2896295a9dacd1c18R935]
> Now my application logs are full of node disconnected messages and it would indicate that there may be a connectivity problem. However I can see that the logs are getting written every 5 minutes exactly, and it's the AdminClient that is writing the logs.
> {code:bash}
> 2022-02-16 14:45:39,277 [d-60105f051cdb-admin] INFO   o.apache.kafka.clients.NetworkClient - [AdminClient clientId=desktop-session-internal-user-streamer-v1-9888ff1d-446e-40cd-88dd-60105f051cdb-admin] Node 1 disconnected.
> {code}
> My guess is that it may be the [connections.max.idle.ms|https://kafka.apache.org/documentation/#adminclientconfigs_connections.max.idle.ms] config setting, and there is in fact no issue with connectivity to the brokers?
> I'm raising this ticket here because the logs are full of these repetitive messages indicating an issue and setting off alarm bells, and also because I did not get a response on the confluent forum or in any slack channels.



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