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https://issues.apache.org/jira/browse/KAFKA-7111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16527614#comment-16527614
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ASF GitHub Bot commented on KAFKA-7111:
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stanislavkozlovski opened a new pull request #5312: KAFKA-7111: Log error
connecting to node at a higher log level
URL: https://github.com/apache/kafka/pull/5312
There were cases where the broker would return an unresolve-able address
(e.g broker inside a docker network while client is outside) and the client
would not log any information as to why it is timing out, since the default log
level does not print `DEBUG` messages.
Changing this log level will enable easier troubleshooting in such
circumstances. This change does not change the logs shown on transient failures
like a broker failure, judging from my local tests.
### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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> Review the NetworkClient log level used
> ---------------------------------------
>
> Key: KAFKA-7111
> URL: https://issues.apache.org/jira/browse/KAFKA-7111
> Project: Kafka
> Issue Type: Improvement
> Components: clients
> Reporter: Luan Cestari
> Assignee: Stanislav Kozlovski
> Priority: Trivial
>
> Hi,
>
> I was using Kafka on some projects and unfortunately I had to use Debug (and
> some times even Trace) log level to see some issues. One of the most recently
> cases was:
> [https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/NetworkClient.java#L872]
>
> If I got the name of the broker and it is unreachable, the errors should be
> more severe than "DEBUG" level IMHO. I would at least put a INFO level for
> this case or ERROR level (which seems to fit better but I don't know the
> practices used in the project).
>
> Thank you in advance
>
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