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[GitHub] [zookeeper] BinyuHuang-nju commented on pull request #1690: ZOOKEEPER-3615: Provide formal specification and verification using TLA+ for Zab

BinyuHuang-nju commented on pull request #1690:
URL: https://github.com/apache/zookeeper/pull/1690#issuecomment-974819434


   @Vanlightly That's right! In my opinion, invariant 'Leadership' makes sure there is at most one leader every epoch. So everytime when a proposal created, its zxid is unique and will never be modified. That's why I just compare zxid of two transaction in **TransactionEqual** and we can prove that is enough for verifying differences between transactions.
   I will update action when leader processes REQUEST, to let leader propose a unique value everytime, to avoid this misunderstanding. Thank you!


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