Benjamin Reed commented on ZOOKEEPER-417:

the release audit generates warnings before the way i added the new keeper 
exception codes. we made the integers deprecated, so i've made the new ones 
deprecated as well. should i put the integer in the new error code rather than 
added a new deprecated constant?

i can't find any failed tests in the test results. what am i missing?

> stray message problem when changing servers
> -------------------------------------------
>                 Key: ZOOKEEPER-417
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-417
>             Project: Zookeeper
>          Issue Type: Bug
>            Reporter: Benjamin Reed
>            Assignee: Benjamin Reed
>            Priority: Blocker
>             Fix For: 3.2.0
>         Attachments: ZOOKEEPER-417.patch, ZOOKEEPER-417.patch
> There is  a possibility for stray messages from a previous connection to 
> violate ordering and generally cause problems. Here is a scenario: we have a 
> client, C, two followers, F1 and F2, and a leader, L. The client is connected 
> to F1, which is a slow follower. C sends setData("/a", "1") to F1 and then 
> loses the connection, so C reconnects to F2 and sends setData("/a", "2").  it 
> is possible, if F1 is slow enough and the setData("/a", "1") got onto the 
> network before the connection break, for F1 to forward the setData("/a", "1") 
> to L after F2 forwards setData("/a", "2").
> to fix this, the leader should keep track of which follower last registered a 
> session for a client and drop any requests from followers for clients for 
> whom they do not have a registration. 

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