QQ: resend pending commands when new leader detected on applied notif… (backport #13095) #13129
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…ication. When a leader changes all enqueuer and consumer processes are notified from the `state_enter(leader,` callback. However a new leader may not yet have applied all commands that the old leader had. If any of those commands is a checkout or a register_enqueuer command these processes will not be notified of the new leader and thus may never resend their pending commands. The new leader will however send an applied notification when it does apply these entries and these are always sent from the leader process so can also be used to trigger pending resends. This commit implements that. (cherry picked from commit d31b9aa)
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…ication.
When a leader changes all enqueuer and consumer processes are notified from the
state_enter(leader,callback. However a new leader may not yet have applied all commands that the old leader had. If any of those commands is a checkout or a register_enqueuer command these processes will not be notified of the new leader and thus may never resend their pending commands.The new leader will however send an applied notification when it does apply these entries and these are always sent from the leader process so can also be used to trigger pending resends. This commit implements that.
Most likely fixes the jepsen failure in https://github.com/rabbitmq/jepsen/actions/runs/12606905118 - however proving this could be extremely difficult.
This is an automatic backport of pull request #13095 done by [Mergify](https://mergify.com).