logline1.readFields(new DataInputStream(new ByteArrayInputStream(b1, s1, l1)));
String line1 = logline1.toString();
String[] logColumns1 = line1.split(columnSeparator);
UTF8 logline2 = new UTF8();
logline2.readFields(new DataInputStream(new ByteArrayInputStream(b2, s2, l2)));
String line2 = logline2.toString();
String[] logColumns2 = line2.split(columnSeparator);
if(logColumns1 == null || logColumns2 == null) {
return super.compare(b1, s1, l1, b2, s2, l2);