[
https://issues.apache.org/jira/browse/CASSANDRA-13714?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jason Brown resolved CASSANDRA-13714.
-------------------------------------
Resolution: Duplicate
This was fixed in CASSANDRA-13993
> response to EchoMessage is sent on wrong connection
> ---------------------------------------------------
>
> Key: CASSANDRA-13714
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13714
> Project: Cassandra
> Issue Type: Bug
> Components: Distributed Metadata
> Reporter: Jason Brown
> Priority: Trivial
>
> Followup to CASSANDRA-13713. To force the {{EchoResponse}} response onto the
> correct stage, we should create a new message type, {{EchoResponseMessage}},
> and map it appropriately in {{MessagingService.verbStages}}. Mapping the
> response message correctly will allow the response to be sent on the gossip
> connection, and then allow us to process it immediately on the gossip stage,
> rather the request_response stage.
> One serious problem to consider is the upgrade scenario, where the
> non-upgraded node expects a simple RequestResponse message that maps to a
> callback. If the upgraded node tries to send the new {{EchoResponseMessage}},
> it will be ignored by the old node. And thus we get into some weird state
> where gossip can't communicate directly, even though the actual TCP
> connection and wrapper channel is setup correctly. (I haven't thought about
> all the oddball fall out that can occur as a rolling upgrade rolls out).
> Thus, due to that complexity, versus the triviality/near-zero impact of the
> bug (sending the response on the wrong channel is not a big deal), I feel
> this ticket is largely not worth bothering with. That said, I at least want
> to capture the problem for posterity.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org
For additional commands, e-mail: commits-h...@cassandra.apache.org
