小编pad*_*dak的帖子

我已经运行了map/reduce工作,但它没有用.我该如何解决这个错误？你能告诉PLZ吗？

13/09/16 15:58:47 INFO mapred.JobClient: Task Id : attempt_201307081931_0006_m_000000_2, Status : FAILED
java.lang.ClassCastException: class com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$Text
at java.lang.Class.asSubclass(Class.java:3116)
at org.apache.hadoop.mapred.JobConf.getOutputKeyComparator(JobConf.java:774)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:959)
at org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>(MapTask.java:674)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:756)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
at org.apache.hadoop.mapred.Child.main(Child.java:249)

我的源代码:

WordCountMapper.java

public class WordCountMapper extends Mapper<LongWritable, Text, Text, IntWritable> {

private final static IntWritable one = new IntWritable();
private Text word = new Text();

public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException{

    StringTokenizer itr = new StringTokenizer(value.toString());
    while(itr.hasMoreTokens()) …