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From "Oleg Anastasyev (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-6863) Incorrect read repair of range thombstones
Date Fri, 14 Mar 2014 18:48:43 GMT
Oleg Anastasyev created CASSANDRA-6863:

             Summary: Incorrect read repair of range thombstones
                 Key: CASSANDRA-6863
             Project: Cassandra
          Issue Type: Bug
         Environment: 2.0
            Reporter: Oleg Anastasyev
         Attachments: ReadRepairRangeThombstoneDiff.txt, ReadRepairsDebugLogger.txt

Rows with range thombstones are read repaired for every replica, if RR is triggered (this
is because CF.diff() returns non null if !isEmpty(), which in turn returns false if range
thombstones list is not empty). 

Also, full rangethombstone list is send to all nodes, which could be a problem if you have
wide partition.

Fixed this by evaluating diff on range thombstone lists as well as on deteleInfo of endpoint
CF versions. Also return null from CF.diff, if no diff in RTL.

A second patch (ReadRepairsDebugLogger.txt) adds some debug logging to look at read repairs.
You may find it useful as well.

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