7946396fe6
As the translog evolves towards a full operations log as part of the sequence numbers push, there is a need for the translog to be able to represent operations for which a sequence number was assigned, but the operation did not mutate the index. Examples of how this can arise are operations that fail after the sequence number is assigned, and gaps in this history that arise when an operation is assigned a sequence number but the operation never completed (e.g., a node crash). It is important that these operations appear in the history so that they can be replicated and replayed during recovery as otherwise the history will be incomplete and local checkpoints will not be able to advance. This commit introduces a no-op to the translog to set the stage for these efforts. Relates #22291 |
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