Feature: permit follower log to revert to earlier state with --features loosen-follower-log-revert
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…res loosen-follower-log-revert` Add a new feature flag `loosen-follower-log-revert`, to permit the follower's log to roll back to an earlier state without causing the leader to panic. Although log state reversion is typically seen as a bug, enabling it can be useful for testing or in some special scenarios. For instance, in an even number nodes cluster, erasing a node's data and then rebooting it(log reverts to empty) will not result in data loss. - Related issue: databendlabs#898
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Changelog
Feature: permit follower log to revert to earlier state with
--features loosen-follower-log-revertAdd a new feature flag
loosen-follower-log-revert, to permit thefollower's log to roll back to an earlier state without causing the
leader to panic.
Although log state reversion is typically seen as a bug, enabling it can
be useful for testing or in some special scenarios.
For instance, in an even number nodes cluster, erasing a node's data
and then rebooting it(log reverts to empty) will not result in data
loss.
This change is