Jacek Lewandowski created CASSANDRA-15946:
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Summary: Communication problem between C* 3 and C* 4 in in-jvm
dtests
Key: CASSANDRA-15946
URL: https://issues.apache.org/jira/browse/CASSANDRA-15946
Project: Cassandra
Issue Type: Bug
Components: Test/dtest
Reporter: Jacek Lewandowski
Assignee: Jacek Lewandowski
There is a communication problem when testing upgrades using in-JVM dtest
between Cassandra 3 and 4.
In a method {{registerInboundFilter}} of {{Instance}}, we get a message which
was just received and we prepare it for filtering as part of which, we
serialize the payload again. This is fine when dealing with incoming Cassandra
4 message, because we can serialize it. However when we get the Cassandra 3
message, which uses a different protocol, and we get something like
{{REQUEST_RSP}}, we can surely deserialize it through some special
deserialization path, but we cannot serialize the payload for it as there is no
serializer defined for {{REQUEST_RSP}} - no wonder, why would Cassandra 4.0
need to be able to serialize Cassandra 3.0 payloads?
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