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https://issues.apache.org/jira/browse/CASSANDRA-18968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17784219#comment-17784219
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Stefan Miklosovic commented on CASSANDRA-18968:
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[~paulo] well ... the waiting for a gossip as you shown that method has its own
set of problems (1) my colleague recently hit and tried to solve it but we had
to revert that, unfortunately. It is quite a read though (2), (2) is the
followup ticket which was trying to improve (1) but we never got there because
we reverted it.
Whole "waiting for gossip to settle" machinery is ... not ideal. Yes, it works
in most of the situations but there are edge cases when it does not, e.g. when
there are large clusters, it may happen that it may evaluate that gossip is
"settled" falsely because it took so much time to detect any changes that it
was thinking it is settled.
(1) https://issues.apache.org/jira/browse/CASSANDRA-18543
(2) https://issues.apache.org/jira/browse/CASSANDRA-18845
> StartupClusterConnectivityChecker fails on upgrade from 3.X
> -----------------------------------------------------------
>
> Key: CASSANDRA-18968
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18968
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Startup and Shutdown
> Reporter: Paulo Motta
> Assignee: Isaac Reath
> Priority: Normal
> Labels: lhf
> Fix For: 4.0.x, 4.1.x
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> Starting up a new 4.X node on a 3.x cluster throws the following warning:
> {noformat}
> WARN [main] 2023-10-27 15:58:22,234
> StartupClusterConnectivityChecker.java:183 - Timed out after 10002
> milliseconds, was waiting for remaining peers to connect: {dc1=[X.Y.Z.W,
> A.B.C.D]}
> {noformat}
> I think this is because the PING messages used by the startup check are not
> available on 3.X.
> To provide a smoother upgrade experience we should probably disable this
> check on a mixed version clusters, or skip peers on versions < 4.x when doing
> the connectivity check.
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