Using Accumulo 1.4.3, I have a table configured to keep Many (maxint) versions of each key, with the 
version being interpreted as a timestamp.  Given a set of times I'm interested in, I can pull out 
the data at exactly those times with no problem.

But I also want another behavior: if I don't have a particular time, I want to respond with the most 
recent version of the data.  I'm trying to use this code:

   void setScannerForTimestamp(Scanner scanner, DateTime timestamp) {
     if (timestamp == null) {
         IteratorSetting cfg = new IteratorSetting(10, "vers", VersioningIterator.class)
         VersioningIterator.setMaxVersions(cfg, 1)
         scanner.addScanIterator(cfg)
     } else {
       TimestampSetIterator.setupIterator(scanner, timestamp)
     }
   }

where TimestampSetIterator is my own custom iterator that's already working.

In my table, I have 76063 different data points, each with 31 versions.  When I pass a null 
timestamp, I expect to get back 76063 entries.  Instead, I get 76063*31 = 2357953 entries.  That is, 
it looks like the table is ignoring the part where I setMaxVersions to 1.  What am I missing?