public void put(String qual, long ts) {
    if (!putTimestamps.contains(ts)) {
      put.addColumn(FAMILY_BYTES, Bytes.toBytes(qual), ts, createValue(ts));
      putTimestamps.add(ts);
    }
    if (VERBOSE) {
      LOG.info("put: row " + Bytes.toStringBinary(put.getRow()) + ", cf " + FAMILY + ", qualifier "
        + qual + ", ts " + ts);
    }
  }
Disable this when this test fails hopelessly and you need to debug a simpler case.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSeekOptimizations.java