> Is it possible for instance that sometimes your cron job takes longer > than five minutes?
Or just a lack of failure handling in the cron job for that matter. Are you *SURE* the the "processed" flag truly got set? Do you have a log statement (written *AFTER* successful write to Cassandra) that indicates the items you specifically say are processed twice, were in fact written twice to Cassandra? -- / Peter Schuller (@scode on twitter)
