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https://issues.apache.org/jira/browse/KAFKA-5179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15998293#comment-15998293
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Ismael Juma commented on KAFKA-5179:
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It would also be useful to warn if a connection fails while bootstrapping. We
have some code for this, but it seems like it doesn't work as per the following
comment:
https://github.com/apache/kafka/pull/2924#issuecomment-297925928
> Log connection termination during authentication
> ------------------------------------------------
>
> Key: KAFKA-5179
> URL: https://issues.apache.org/jira/browse/KAFKA-5179
> Project: Kafka
> Issue Type: Sub-task
> Components: security
> Affects Versions: 0.10.2.0
> Reporter: Rajini Sivaram
> Assignee: Rajini Sivaram
> Fix For: 0.11.0.0
>
>
> As discussed in KAFKA-4764, this is to provide feedback to users, since
> currently IOException are logged at debug level and it is hard to tell if a
> connection was terminated due to invalid credentials. KIP-152 addresses a
> long-term fix to handle authentication failures better in Kafka.
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