Scan.addFamiliy reduces results

[Peter Wolf]

Hi all,

I am doing a scan on a table with multiple families.  My code looks like 
this...

        Scan scan = new Scan(calculateStartRowKey(a), 
calculateEndRowKey(b));

        scan.setCaching(10000);
        Filter filter = new SingleColumnValueFilter(xFamily, xColumn, 
CompareFilter.CompareOp.EQUAL, Bytes.toBytes(x));
        scan.setFilter(filter);
        scan
                .addFamily(xFamily)
                .addFamily(yFamily)
                .addFamily(zFamily);

        ResultScanner scanner = hTable.getScanner(scan);

        Iterator<Result> it = scanner.iterator();
        int resultCount = 0;
        while (it.hasNext()) {
              Result result = it.next();

              resultCount++;
        }

However, I am getting different number of results, depending on which 
families are added.  For example these give different result counts

        scan
                //.addFamily(xFamily)
                .addFamily(yFamily)
                .addFamily(zFamily);
and
        scan
                .addFamily(xFamily)
                .addFamily(yFamily)
                .addFamily(zFamily);


There is no error message, and I don't see anything in the Scan 
documentation.  Does anyone know what is going on?

Thanks
Peter