All,
I've been trying to understand why I'm getting this error. It happens when
JobClient.runJob() is invoked, but before my Map class gets invoked. In
fact, if I use the Identity map class and/or the Identity reduce class, it
still occurs. Here's the code:
package com.asolutions.thumbnailer.hbase;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.mapred.TableMap;
import org.apache.hadoop.hbase.mapred.TableReduce;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
public class Thumbnailer {
private static final String IMAGES = "images";
private static final String IMAGE_FAMILY = "imageFamily:";
protected volatile HBaseConfiguration hbConf;
public static void main(String[] args) throws IOException {
new Thumbnailer().run();
}
private void run() throws IOException {
hbConf = new HBaseConfiguration();
JobConf conf = new JobConf(hbConf, this.getClass());
conf.setJobName("Thumbnailer (HBase implementation)");
TableMap.initJob(IMAGES, IMAGE_FAMILY, ThumbnailerMap.class, conf);
TableReduce.initJob(IMAGES, ThumbnailerReduce.class, conf);
conf.setMapOutputValueClass(BytesWritable.class);
JobClient.runJob(conf);
}
}
and here's the error:
> ~/apps/hadoop/bin/hadoop jar mapreduce.jar
com.asolutions.thumbnailer.hbase.Thumbnailer
08/08/09 07:17:34 INFO mapred.JobClient: Running job: job_200808081511_0003
08/08/09 07:17:35 INFO mapred.JobClient: map 0% reduce 0%
08/08/09 07:17:45 INFO mapred.JobClient: Task Id :
task_200808081511_0003_m_000000_0, Status : FAILED
java.lang.AbstractMethodError:
org.apache.hadoop.hbase.mapred.TableInputFormat$TableRecordReader.createKey()Ljava/lang/Object;
at
org.apache.hadoop.mapred.MapTask$TrackedRecordReader.createKey(MapTask.java:146)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:42)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:219)
at
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2124)
Hopefully, I'm making some obvious mistake that someone could point out...
--
Don Branson
[EMAIL PROTECTED]
