Alexander Shraer commented on ZOOKEEPER-2866:

Discussed offline with [~castuardo] and we currently believe that there is no 
Please reopen the Jira if needed.

> Reconfig Causes Newly Joined Node to Crash
> ------------------------------------------
>                 Key: ZOOKEEPER-2866
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2866
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: leaderElection, quorum, server
>    Affects Versions: 3.5.3
>            Reporter: Jeffrey F. Lukman
>         Attachments: ZK-2866.pdf
> When we run our Distributed system Model Checking (DMCK) in ZooKeeper v3.5.3
> by following the workload in ZK-2778:
> * initially start 2 ZooKeeper nodes
> * start 3 new nodes and let them join the cluster
> * do a reconfiguration where the newly joined will be PARTICIPANTS, 
> while the previous 2 nodes change to be OBSERVERS
> We think our DMCK found this following bug:
> * one of the newly joined node crashes due to 
> it receives an *unexpected* PROPOSAL message
> from the new leader in the cluster.
> For complete information of the bug, please see the document that is attached.

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