[log] Introduce OffsetForLeaderEpoch Request/Response - #788
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@wuchong pr ready, could you take a look at this pr? thx. |
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Purpose
Linked issue: #750
To use LeaderEpoch rather than HighWatermark for truncation, we need to introduce OffsetForLeaderEpochRequest/Response to fetch the latest LeaderEpoch -> Offset info from leader to truncate log.
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Tests
API and Format
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