Map / reduce error Error in configuring object

Brother new to Map / reduce programming and want to read and write through dbinputformat Oracle database, but there has been an error Error in configuring object.

But having hadoop0.20.0 of dbinputformat not to support Oracle's ah? I would urge large cattle wing. .

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Iterator;
import java.util.Random;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.DoubleWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.MapReduceBase;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapred.lib.LongSumReducer;
import org.apache.hadoop.mapred.lib.db.DBConfiguration;
import org.apache.hadoop.mapred.lib.db.DBInputFormat;
import org.apache.hadoop.mapred.lib.db.DBOutputFormat;
import org.apache.hadoop.mapred.lib.db.DBWritable;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.hsqldb.Server;

public class WordCountDB {


private static final String DRIVER_CLASS = "com.oracle.jdbc.Driver"; / / database engine
private static final String DB_URL = "jdbc: oracle :/ / 127.0.0.1:1521 / BUS"; / / address of the database
private static final String DB_USER = "manage_bus"; / / database name
private static final String DB_PASSWD = "its312"; / / Password

private static final String [] FieldNames = {"name", "age"};

private static Connection connection; / / database connection
public static boolean initialized = false; / / determine database connection

public static class TokenizerMapper extends MapReduceBase implements
Mapper {



@ Override
public void map (LongWritable key, TeacherRecord value, OutputCollector output, Reporter reporter)
throws IOException
{
System.out.println ("enter the map function");
output.collect (new Text (value.name), new DoubleWritable (value.age));
}
}


public static class IntSumReducer extends MapReduceBase implements
Reducer <Text,DoubleWritable,TeacherRecord,NullWritable> {

NullWritable n = NullWritable.get ();
@ Override
public void reduce (Text key, Iterator values,
OutputCollector output, Reporter arg3)
throws IOException {
/ / TODO Auto-generated method stub
System.out.println ("enter the reduce function");

double sum = 0;

while (values.hasNext ()) {
sum + = values.next (). get ();
}

output.collect (new TeacherRecord (key.toString (), sum), n);

}
}

static class TeacherRecord implements Writable, DBWritable
{
String name;
double age;

public TeacherRecord (String m_name, double m_age) {
this.name = m_name;
this.age = m_age;
}

@ Override
public void readFields (DataInput in) throws IOException {
this.name = Text.readString (in);
this.age = in.readDouble ();
}

@ Override
public void write (DataOutput out) throws IOException {
Text.writeString (out, this.name);
out.writeDouble (age);
}

@ Override
public void readFields (ResultSet resultSet) throws SQLException {
this.name = resultSet.getString (1);
this.age = resultSet.getDouble (2);
}
@ Override
public void write (PreparedStatement statement) throws SQLException {
statement.setString (1, this.name);
statement.setDouble (2, this.age);
}
}


public static void main (String [] args) throws Exception
{
String driverClassName = DRIVER_CLASS;
String url = DB_URL;
String dbuser = DB_USER;
String dbpw = DB_PASSWD;

/ / map-reduce setting
/ / JobConf job = new JobConf (getConf (), WordCountDB.class); / /???? doubt getConf is doing

JobConf job = new JobConf (WordCountDB.class);
job.setJobName ("Count from DB");

job.setMapperClass (TokenizerMapper.class);
job.setCombinerClass (IntSumReducer.class);
job.setReducerClass (IntSumReducer.class);

job.setInputFormat (DBInputFormat.class);
DBConfiguration.configureDB (job, driverClassName, url, dbuser, dbpw); / / connect to database
DBInputFormat.setInput (job, TeacherRecord.class, "teacher", null, "name", FieldNames);

job.setMapOutputKeyClass (Text.class);
job.setMapOutputValueClass (DoubleWritable.class);



DBOutputFormat.setOutput (job, "teacher", FieldNames);
job.setOutputKeyClass (TeacherRecord.class);
job.setOutputValueClass (NullWritable.class);

try
{
JobClient.runJob (job);
}
catch (Exception e)
{
e.printStackTrace ();
System.out.println ("abnormal operation");
}
}

the following error:
java.lang.RuntimeException: Error in configuring object
at org.apache.hadoop.util.ReflectionUtils.setJobConf (ReflectionUtils.java: 93)
at org.apache.hadoop.util.ReflectionUtils.setConf (ReflectionUtils.java: 64)
at org.apache.hadoop.util.ReflectionUtils.newInstance (ReflectionUtils.java: 117)
at org.apache.hadoop.mapred.JobConf.getInputFormat (JobConf.java: 400)
at org.apache.hadoop.mapred.JobClient.writeOldSplits (JobClient.java: 810)
at org.apache.hadoop.mapred.JobClient.submitJobInternal (JobClient.java: 781)
at org.apache.hadoop.mapred.JobClient.submitJob (JobClient.java: 730)
at org.apache.hadoop.mapred.JobClient.runJob (JobClient.java: 1249)
at WordCountDB.main (WordCountDB.java: 205)

tangled for a long time, I hope you can help out, thank you!
------ Solution ---------------------------------------- ----
brothers you play enough profound, Map / Reduce are started up. While also doing cloud computing-related business, but did not come into contact with the actual Map / Reduce programming, can not help you. Friendship top.
------ Solution ---------------------------------------- ----
Database recommend using HBase, Hive
------ For reference only ------------------------- --------------
But, according to business requirements, data that is under Oracle, no way ah. .

I was followed by a senior postdoctoral study only, fourth year, not how will. .
------ For reference only -------------------------------------- -
this problem has been solved, in cygwin and HADOOP_CLASSPATH to add CLASSPATH and environment variables, addresses are HADOOP / LIB, and then all of Oracle's entire library copying HADOOP / LIB can be. But there will be another problem, Error reading task outputhttp :/ / chengzhf: 50060/tasklog? Plaintext = true & taskid = attempt_201108201645_0004_m_000001_0 & filter = stdout

To a long time to complete the job of operations. .

begged the god to appear. . . .
------ For reference only -------------------------------------- -
same neighborhoods! ! !
------ For reference only -------------------------------------- -
i really want to know how to solve the problem ..
------ For reference only ------------- --------------------------
I Nutch1.6 also reported this error, what is what causes it? Thank you.
hoodp log files
java.lang.RuntimeException: Error in configuring object
at org.apache.hadoop.util.ReflectionUtils.setJobConf (ReflectionUtils.java: 93)
at org.apache.hadoop.util.ReflectionUtils.setConf (ReflectionUtils.java: 64)
at org.apache.hadoop.util.ReflectionUtils.newInstance (ReflectionUtils.java: 117)
at org.apache.hadoop.mapred.MapTask.runOldMapper (MapTask.java: 432)
at org.apache.hadoop.mapred.MapTask.run (MapTask.java: 372)
at org.apache.hadoop.mapred.LocalJobRunner $ Job.run (LocalJobRunner.java: 212)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java: 39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java: 25)
at java.lang.reflect.Method.invoke (Method.java: 597)
at org.apache.hadoop.util.ReflectionUtils.setJobConf (ReflectionUtils.java: 88)
... 5 more
Caused by: java.lang.RuntimeException: Error in configuring object
at org.apache.hadoop.util.ReflectionUtils.setJobConf (ReflectionUtils.java: 93)
at org.apache.hadoop.util.ReflectionUtils.setConf (ReflectionUtils.java: 64)
at org.apache.hadoop.util.ReflectionUtils.newInstance (ReflectionUtils.java: 117)
at org.apache.hadoop.mapred.MapRunner.configure (MapRunner.java: 34)
... 10 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java: 39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java: 25)
at java.lang.reflect.Method.invoke (Method.java: 597)
at org.apache.hadoop.util.ReflectionUtils.setJobConf (ReflectionUtils.java: 88)
... 13 more
Caused by: java.lang.RuntimeException: x point org.apache.nutch.net.URLNormalizer not found.
at org.apache.nutch.net.URLNormalizers. (URLNormalizers.java: 123)
at org.apache.nutch.crawl.Injector $ InjectMapper.configure (Injector.java: 74)
... 18 more
console error job failed