Bruce Schuchardt created GEODE-7038:
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Summary: 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: Improvement
Components: membership, messaging
Reporter: Bruce Schuchardt
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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