TheR1sing3un opened a new issue, #4813:
URL: https://github.com/apache/rocketmq/issues/4813
1. Now we just randomly(the first one in syncStateSet) elect a master when
the controller proposes an ElectMaster event.
2. We can design an interface to elect the master, and we can execute our
own strategy like a plugin.
3. We provide a default elect policy to elect master.
- We add more inforamtion in haertbeat packet, such as maxOffset, epoch
and confitmOffset.
- We elect a master in syncStateSet first, and we prefer the candidate
with higher epoch or higher maxOffset(when the epoch is equal).
- If the enableElectUnCleanMaster == true, we can elect a master in all
replicas when we elect nothing from syncStateSet. We elect a master(also with
higher epoch and maxOffset) from all replicas.
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