@Override
      public int compare(StoreFileScanner s1, StoreFileScanner s2) {
        Path p1 = s1.getReader().getHFileReader().getPath();
        Path p2 = s2.getReader().getHFileReader().getPath();
        long t1, t2;
        try {
          t1 = fs.getFileStatus(p1).getModificationTime();
          t2 = fs.getFileStatus(p2).getModificationTime();
        } catch (IOException ex) {
          throw new RuntimeException(ex);
        }
        return t1 < t2 ? -1 : t1 == t2 ? 1 : 0;
      }
Test a multi-column scanner when there is a Bloom filter false-positive. This is needed for the
multi-column Bloom filter optimization.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScanWithBloomError.java