Steve, You don't need to implement the comparator. I do think that you need a no-argument constructor. In general, when Hadoop is creating one of your objects, it will call the no-argument constructor and then call readFields.
As a point of style, I would consider it very bad form to not mark fields as private without a very good reason. On 10/10/07 3:18 PM, "Steve Schlosser" <[EMAIL PROTECTED]> wrote: > For the time being, I've given up on using object serialization to do > what I want. Instead, I'm going to just marshal and unmarshal the > values of my class myself. I've implemented write() and readField() > methods in the classes that I want to read and write. (See my > definition of Sample below.) > > Unfortunately, Hadoop throws the following exception when my program starts: > > Job started: Wed Oct 10 18:04:06 EDT 2007 > 07/10/10 18:04:06 INFO mapred.InputFormatBase: Total input paths to process : > 1 > 07/10/10 18:04:06 INFO mapred.JobClient: Running job: job_nlx1k6 > 07/10/10 18:04:06 WARN mapred.LocalJobRunner: job_nlx1k6 > java.lang.ExceptionInInitializerError > at java.lang.Class.forName0(Native Method) > at java.lang.Class.forName(Class.java:247) > at > org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:315) > at
