[KAFKA-14643] TopicBased RemoteLogMetadataManager can't support reassign user-partitions

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: core
• Assignee: hzh0425
• Reporter: hzh0425
• Reviewer: Satish Duggana
• Created: 20/Jan/23 06:56
• Updated: 20/Jan/23 06:56

Description

Background:
In KIP-405: Kafka Tiered Storage - Apache Kafka - Apache Software Foundation,  kafka introduced the feature of hierarchical storage.
Also, KAFKA-9555 Topic-based implementation for the RemoteLogMetadataManager - ASF JIRA (apache.org) implements the default RLMM - 'TopicBased-RLMM'.

Problem:
TopicBased-RLMM will only subscribe to the Partitions where the current Broker is Leader or Follower. If the current Broker is not the Leader or Follower, then RLMM will directly skip the metadata records related to these Partitions.

When reassign user-partitions occurs, rlmm will subscribe to new user-partitions, assuming that the metadata-partition to which the new user-partition belongs is 'metadata-partition0', and RLMM has consumed 'metadata-partition0' to offset = 100 before the reassign partition occurs, then after reassign, RMLM will not consume 'metadata-partition0' from the beginning, and finally cause the metadata records related to the new user-partition to be lost with offset < 100.

Solution

Let RLMM subscribe to all user-patitions, instead of only subscribing to partitions where the current broker is leader or follower.
In this way, when reassign partition occurs, RLMM will have new partition's metadata records.