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https://issues.apache.org/jira/browse/GEODE-3153?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anthony Baker resolved GEODE-3153.
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Resolution: Fixed
> Client receives duplicate events during rolling upgrade
> -------------------------------------------------------
>
> Key: GEODE-3153
> URL: https://issues.apache.org/jira/browse/GEODE-3153
> Project: Geode
> Issue Type: Bug
> Components: client queues
> Reporter: Dan Smith
> Fix For: 1.2.0
>
>
> During a rolling upgrade from 1.1 to 1.2, we see 1.1 client receive duplicate
> events.
> This is the scenario
> 1) 1.1 peer is doing puts
> 2) 1.1 client has registered interest, and is connected to a 1.1 server
> 3) 1.1 server is upgraded to a 1.2 server
> 4) The client may receive some of the events that are being put twice.
> Looking further, it appears that when a put goes through a 1.1 server to a
> 1.1 client, the member id includes a 17 byte unique id as the last part of
> the serialized data. When the put goes through a 1.2 server, those 17 bytes
> become zeros.
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