ra_log: Allow resetting last-written index to snapshot#558
Merged
Conversation
A leader might've taken a snapshot at the last index before a partition takes place. It can then write commands after the partition is in effect and the commands will not be committed. Then another leader can be elected and ask the deposed leader to reset its log down to the snapshot index. Previously this crashed since `ra_log:set_last_index/2` did not consider the snapshot state.
Collaborator
Author
|
This is a bit tricky to test since |
kjnilsson
approved these changes
Nov 5, 2025
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
A leader might've taken a snapshot at the last index before a partition takes place. It can then write commands after the partition is in effect and the commands will not be committed. Then another leader can be elected and ask the deposed leader to reset its log down to the snapshot index. Previously this crashed since
ra_log:set_last_index/2did not consider the snapshot state.Fixes #557