Short read protection is broken
-------------------------------
Key: CASSANDRA-3934
URL: https://issues.apache.org/jira/browse/CASSANDRA-3934
Project: Cassandra
Issue Type: Bug
Affects Versions: 1.0.2
Reporter: Sylvain Lebresne
Assignee: Sylvain Lebresne
Priority: Minor
Fix For: 1.0.8, 1.1.0
When a read needs to do more than one retry (due to short reads), the
originalCount is not preserved by the retry leading to returning more than the
requested number of columns.
Moreover, when a retried read checks whether more retry is needed, it doesn't
compare the number of live column retrieved against the original number of
columns requested by the user, but against the number of columns requested
during the retry, making it much more likely to actually do one more retry.
This catch by the two tests 'short_read_test' and 'short_read_reversed_test' at
https://github.com/riptano/cassandra-dtest/blob/master/consistency_test.py that
are failing intermittently.
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