Sam Tunnicliffe created CASSANDRA-16877:
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Summary: High priority internode messages which exceed the large
message threshold are dropped
Key: CASSANDRA-16877
URL: https://issues.apache.org/jira/browse/CASSANDRA-16877
Project: Cassandra
Issue Type: Bug
Components: Cluster/Gossip
Reporter: Sam Tunnicliffe
Assignee: Sam Tunnicliffe
Currently, there is an assumption that internode messages whose verb has
priority P0 will always fit within a single messaging frame. While this is
usually the case, on occasion it is possible that this assumption does not
hold. One example is gossip messages during the startup shadow round, where in
very large clusters the digest ack can contain all states for every peer. In
this scenario, the respondent fails to send the ack which may lead to the
shadow round and, ultimately, the startup failing.
We could tweak the shadow round acks to minimise the message size, but a more
robust solution would be to permit high priority messages to be sent on the
large messages connection when necessary.
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