Explore adding replay ID for counters
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                 Key: CASSANDRA-2783
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2783
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Sylvain Lebresne


If a counter write returns a TimeoutException, the client cannot retry its 
write without risking an overcount.

One idea to fix this would be to allow the client to specify a replay ID with 
each counter write unique to the write. If the write timeout, the client would 
resubmit the write with the same replay ID and the system would ensure that 
write is only replayed if the previous write was not persisted.

Of course, the last part of this ("the system would ensure ...") is the hard 
part. Still worth exploring I believe.

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