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https://issues.apache.org/jira/browse/GEODE-7038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16897529#comment-16897529
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ASF subversion and git services commented on GEODE-7038:
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Commit 23727962252d5cbdf5dd7cccbd91ab65eca3ab19 in geode's branch
refs/heads/feature/GEODE-7038 from Bruce Schuchardt
[ https://gitbox.apache.org/repos/asf?p=geode.git;h=2372796 ]
GEODE-7038: After auto-reconnect a server's multicat communications aren't
working correctly
Ensure that a JoinResponseMessage is sent if multicast is enabled. This
allows JGroupsMessenger to piggy-back a multicast message digest on the
response that the new process can install in its JGroups stack to ensure
that multicast messaging is properly initialized.
I've also replaced complex checks for whether UDP security is enabled
with a simpler check on ServiceConfig. When UDP security is enabled we
are already sending a JoinResponseMessage and so we don't need to send
another one if multicast is enabled.
> 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
>
> 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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