Don,
This kind of error should normally be caught by the compiler. From the stack
trace, I presume you are using the 0.1 branch so I advise making sure that
the HBase version bundled with your jar is the same that the one that runs
on your cluster.
J-D
On Sat, Aug 9, 2008 at 8:35 AM, Don Branson <[EMAIL PROTECTED]> wrote:
> 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]
>
