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https://issues.apache.org/jira/browse/KAFKA-12901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17499138#comment-17499138
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Jun Rao commented on KAFKA-12901:
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[~suriyav] : Did you see the same log error as in KAFKA-7987? If not, it may
not be related. 2.8 is quite old though. You probably want to upgrade to a
newer version.
> Metadata not updated after broker restart.
> ------------------------------------------
>
> Key: KAFKA-12901
> URL: https://issues.apache.org/jira/browse/KAFKA-12901
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 2.8.0
> Reporter: Suriya Vijayaraghavan
> Priority: Major
>
> We upgraded to version 2.8 from 2.7. After monitoring for few weeks we
> upgraded in our production setup (as we didn't enable Kraft we went ahead),
> we faced TimeoutException in our clients after few weeks in our production
> setup. We tried to list all active brokers using admin client API, all
> brokers were listed properly. So we logged into that broker and tried to do a
> describe topic with localhost as bootstrap-server, but we got timeout as
> there.
> When checking the logs, we noticed a Shutdown print from kafka-shutdown-hook
> thread (zookeeper session timed out and we had three retry failures). But the
> controlled shutdown got failed (got unknown server error response from the
> controller), and proceeded to unclean shutdown. Still the process didn't get
> quit but the process didnt process any other operation as well. And this did
> not remove the broker from alive status for hours (able to see this broker in
> list of brokers) and our clients were still trying to contact this broker and
> failing with timeout exception. So we tried restarting the problematic
> broker, but we faced unknown topic or partition issue in our client after the
> restart which caused timeout as well. We noticed that metadata was not
> loaded. So we had to restart our controller. And after restarting the
> controller everthing got back to normal.
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