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https://issues.apache.org/jira/browse/CASSANDRA-15727?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aleksey Yeschenko updated CASSANDRA-15727:
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Status: Ready to Commit (was: Review In Progress)
> Internode messaging connection setup between 4.0 and legacy SSL 3.0 fails if
> initial connection version incorrect
> -----------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-15727
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15727
> Project: Cassandra
> Issue Type: Bug
> Components: Messaging/Internode
> Reporter: Jon Meredith
> Assignee: Jon Meredith
> Priority: Normal
> Labels: pull-request-available
> Fix For: 4.0-beta
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> This was discovered while testing upgrading an SSL enabled cluster from 3.0
> to 4.0. The 3.0 cluster was configured to only listen on the ssl storage
> port. When the upgraded 4.0 node started it received a gossip messsage that
> triggered a shadow round before it had correctly set the messaging versions
> for the other endpoints.
> Sending the message created the connection, but because the endpoint
> defaulted to {{VERSION_40}} the initial connect attempt was to the regular
> {{storage_port}}. The 3.0 node was only listening on the
> {{ssl_storage_port}}, so the connection was refused and the
> {{OutboundConnection.onFailure}} handler was called. As the shadow
> gossip round had queued up a message, the {{hasPending}} branch was followed
> and the connection was rescheduled, however the port is never recalculated as
> the original settings are used so it always fails.
> Meanwhile, the node discovered information about peers through inbound
> connection and gossip updating the messaging version for the endpoint which
> could have been used to make a valid connection.
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