Sam Tunnicliffe created CASSANDRA-18407:
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Summary: CEP-21 Remove paranoid check which fails due to
pre-existing mismatch on replica vs query range
Key: CASSANDRA-18407
URL: https://issues.apache.org/jira/browse/CASSANDRA-18407
Project: Cassandra
Issue Type: Improvement
Reporter: Sam Tunnicliffe
Assignee: Sam Tunnicliffe
If short read protection is activated, a replica plan is constructed to fetch
additional partitions from a single replica in the original set. As additional
partitions are requested, the data range of the query is reduced but the
original \{{Replica}} instance is reused, resulting in a mismatch between the
range of the query and that of the replica. This is not new to TCM and is
present in trunk. It is called out in a comment, but thought to be harmless as
the narrowed range should be a subset of the original data range which did
match the replica's. Early TCM patches introduced an addition check here on the
two ranges and so rejects SRP queries which trunk does not.
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