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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 resolved GEODE-7038.
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Resolution: Fixed
> 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
> Assignee: Bruce Schuchardt
> Priority: Major
> Time Spent: 50m
> Remaining Estimate: 0h
>
> 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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