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https://issues.apache.org/jira/browse/KAFKA-15682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kamal Chandraprakash reassigned KAFKA-15682:
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Assignee: Kamal Chandraprakash
> Ensure internal remote log metadata topic does not expire its segments before
> deleting user-topic segments
> ----------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-15682
> URL: https://issues.apache.org/jira/browse/KAFKA-15682
> Project: Kafka
> Issue Type: Task
> Reporter: Kamal Chandraprakash
> Assignee: Kamal Chandraprakash
> Priority: Major
>
> One of the implementation of RemoteLogMetadataManager is
> TopicBasedRemoteLogMetadataManager which uses an internal Kafka topic
> {{__remote_log_metadata}} to store the metadata about the remote log
> segments. Unlike other internal topics which are compaction enabled, this
> topic is not enabled with compaction and retention is set to unlimited.
> Keeping this internal topic retention to unlimited is not practical in real
> world use-case where the topic local disk usage footprint grow huge over a
> period of time.
> It is assumed that the user will set the retention to a reasonable time such
> that it is the max of all the user-created topics (max + X). We can't just
> rely on the assumption and need an assertion to ensure that the internal
> {{__remote_log_metadata}} segments are not eligible for deletion before the
> expiry of all the relevant user-topic uploaded remote-log-segments ,
> otherwise there will be dangling remote-log-segments which won't be cleared
> once all the brokers are restarted post the internal topic retention cleanup.
> See the discussion thread:
> https://github.com/apache/kafka/pull/14576#discussion_r1368576126
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