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https://issues.apache.org/jira/browse/GEODE-7038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bruce Schuchardt updated GEODE-7038:
------------------------------------
    Issue Type: Bug  (was: Improvement)

> After auto-reconnect a server's multicat communications aren't working 
> correctly
> --------------------------------------------------------------------------------
>
>                 Key: GEODE-7038
>                 URL: https://issues.apache.org/jira/browse/GEODE-7038
>             Project: Geode
>          Issue Type: Bug
>          Components: membership, messaging
>            Reporter: Bruce Schuchardt
>            Priority: Major
>
> This was observed in an server having multicast enabled on a Region.  The 
> server went into a GC pause and was kicked out of the cluster.  After 
> auto-reconnecting all of the servers were requested to shut down and they all 
> hung on destroy-region message responses.  Statistics showed constant 
> multicast retransmission requests but no retransmissions being sent.
> When a Region is configured to use multicast all of its cache operation 
> messages are multicast, including a destroy-region message.
> Some time ago we decided to stop sending Join Request Responses during 
> discovery.  These messages were responsible for carrying the JGroups 
> multicast message digest so that a joining member could install this digest 
> into its multicast protocol.  Today these messages are only sent if a UDP 
> Diffie-Hellman algorithm has been specified.  We need to also ensure that we 
> send these messages if multicast is enabled.
>  



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