我想从 Eclipse 对集群运行 hadoop 字数统计。但我得到一个错误。我更改了输出目录，但程序行为没有变化。你能帮我解决这个错误吗：
2013-10-23 23:06:13,783 WARN [main] conf.Configuration
(Configuration.java:warnOnceIfDeprecated(816)) - session.id is deprecated. Instead, use
dfs.metrics.session-id
2013-10-23 23:06:13,794 INFO [main] jvm.JvmMetrics (JvmMetrics.java:init(76)) -
Initializing JVM Metrics with processName=JobTracker, sessionId=
2013-10-23 23:06:13,829 INFO [main] jvm.JvmMetrics (JvmMetrics.java:init(71)) - Cannot
initialize JVM Metrics with processName=JobTracker, sessionId= - already initialized
2013-10-23 23:06:13,915 WARN [main] util.NativeCodeLoader (NativeCodeLoader.java:
<clinit>(62)) - Unable to load native-hadoop library for your platform... using
builtin-java classes where applicable
2013-10-23 23:06:13,947 WARN [main] mapreduce.JobSubmitter
(JobSubmitter.java:copyAndConfigureFiles(138)) - Hadoop command-line option parsing not
performed. Implement the Tool interface and execute your application with ToolRunner to
remedy this.
2013-10-23 23:06:13,962 WARN [main] mapreduce.JobSubmitter
(JobSubmitter.java:copyAndConfigureFiles(247)) - No job jar file set. User classes may not be found. See Job or Job#setJar(String).
2013-10-23 23:06:13,978 WARN [main] snappy.LoadSnappy (LoadSnappy.java:<clinit>(46)) -
Snappy native library not loaded
2013-10-23 23:06:13,985 INFO [main] mapred.FileInputFormat
(FileInputFormat.java:listStatus(233)) - Total input paths to process : 1
2013-10-23 23:06:14,107 INFO [main] mapreduce.JobSubmitter
(JobSubmitter.java:submitJobInternal(368)) - number of splits:1
2013-10-23 23:06:14,167 WARN [main] conf.Configuration
(Configuration.java:warnOnceIfDeprecated(816)) - mapred.output.value.class is
deprecated. Instead, use mapreduce.job.output.value.class
2013-10-23 23:06:14,168 WARN [main] conf.Configuration
(Configuration.java:warnOnceIfDeprecated(816)) - mapred.job.name is deprecated.
Instead, use mapreduce.job.name
2013-10-23 23:06:14,169 WARN [main] conf.Configuration
(Configuration.java:warnOnceIfDeprecated(816)) - mapred.input.dir is deprecated.
Instead, use mapreduce.input.fileinputformat.inputdir
2013-10-23 23:06:14,169 WARN [main] conf.Configuration
(Configuration.java:warnOnceIfDeprecated(816)) - mapred.output.dir is deprecated.
Instead, use mapreduce.output.fileoutputformat.outputdir
2013-10-23 23:06:14,169 WARN [main] conf.Configuration
(Configuration.java:warnOnceIfDeprecated(816)) - mapred.map.tasks is deprecated.
Instead, use mapreduce.job.maps
2013-10-23 23:06:14,170 WARN [main] conf.Configuration
(Configuration.java:warnOnceIfDeprecated(816)) - mapred
MyHadoopDriver 是：
package org.orzota.bookx.mappers;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.*;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.TextInputFormat;
import org.apache.hadoop.mapred.TextOutputFormat;
public class MyHadoopDriver {
public static void main(String[] args) {
JobClient client = new JobClient();
JobConf conf = new JobConf(
org.orzota.bookx.mappers.MyHadoopDriver.class);
conf.setJobName("BookCrossing1.0");
// TODO: specify output types
conf.setOutputKeyClass(Text.class);
conf.setOutputValueClass(IntWritable.class);
// TODO: specify a mapper
conf.setMapperClass(org.orzota.bookx.mappers.MyHadoopMapper.class);
// TODO: specify a reducer
conf.setReducerClass(org.orzota.bookx.mappers.MyHadoopReducer.class);
/////////////////////////////////////////////
conf.setInputFormat(TextInputFormat.class);
conf.setOutputFormat(TextOutputFormat.class);
///////////////////////////////////////////////
FileInputFormat.setInputPaths(conf, new Path(args[0]));
FileOutputFormat.setOutputPath(conf, new Path(args[1]));
////////////////////////////////////////////////
client.setConf(conf);
try {
JobClient.runJob(conf);
} catch (Exception e) {
e.printStackTrace();
}
}
}