Re: Cassandra/Spark failing to process large table

[kurt greaves]

Note that read repairs only occur for QUORUM/equivalent and higher, and
also with a 10% (default) chance on anything less than QUORUM
(ONE/LOCAL_ONE). This is configured at the table level through the
dclocal_read_repair_chance and read_repair_chance settings (which are going
away in 4.0). So if you read at LOCAL_ONE it would have been chance that
caused the read repair. Don't expect it to happen for every read (unless
you configure it to, or use >=QUORUM).​