命令：./crawl /网址/ MYDIR XXXXX 2Hadoop的2.5.1 + Nutch的-2.2.1：实测值接口org.apache.hadoop.mapreduce.TaskAttemptContext，但类预计
当我在Hadoop-2.5.1和Nutch-2.2.1中运行这个命令，我得到的错误信息如下。
14/10/07 19点58分10秒INFO mapreduce.Job：正在运行的作业：job_1411692996443_0016
14/10/07 19点58分十七秒INFO mapreduce.Job：工作job_1411692996443_0016在超级模式下运行：假 14/10月7日19时58分十七秒INFO mapreduce.Job：地图0％减少0％
14/10/07 19时58分21秒INFO mapreduce.Job：任务标识：attempt_1411692996443_0016_m_000000_0，状态：FAILED
错误：发现界面org.apache.hadoop.mapreduce.TaskAttemptContext，但类预计
14/10/07 19时58分26秒INFO mapreduce.Job：任务标识：attempt_1411692996443_0016_m_000000_1，状态：失败
错误：发现界面org.apache.hadoop.mapreduce.TaskAttemptContext，但类预计 14/10/07 19时58分31秒INFO mapreduce.Job：任务标识：attempt_1411692996443_0016_m_000000_2，状态：失败
错误：发现接口org.apache.hadoop.mapreduce.TaskAttemptContext，但期望类 14/10/07 19:58:36 INFO mapreduce.Job：map 100％reduce 0％ 14/10/07 19:58： 36信息mapreduce.Job：作业job_1411692996443_0016由于以下原因而失败，状态为FAILED：任务失败task_1411692996443_0016_m_000000
作业失败，因为任务失败。 failedMaps：1个failedReduces：0
14/10/07 19时58分36秒INFO mapreduce.Job：计数器：12
Job Counters
Failed map tasks=4
Launched map tasks=4
Other local map tasks=3
Data-local map tasks=1
Total time spent by all maps in occupied slots (ms)=11785
Total time spent by all reduces in occupied slots (ms)=0
Total time spent by all map tasks (ms)=11785
Total vcore-seconds taken by all map tasks=11785
Total megabyte-seconds taken by all map tasks=12067840
Map-Reduce Framework
CPU time spent (ms)=0
Physical memory (bytes) snapshot=0
Virtual memory (bytes) snapshot=0
14/10/07 19时58分36秒ERROR crawl.InjectorJob：InjectorJob：了java.lang.RuntimeException：作业失败：名称= [/ MYDIR]注入/网址，作业ID = job_1411692996443_0016
at org.apache.nutch.util.NutchJob.waitForCompletion(NutchJob.java:55)
at org.apache.nutch.crawl.InjectorJob.run(InjectorJob.java:233)
at org.apache.nutch.crawl.InjectorJob.inject(InjectorJob.java:251)
at org.apache.nutch.crawl.InjectorJob.run(InjectorJob.java:273)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.nutch.crawl.InjectorJob.main(InjectorJob.java:282)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
那么，什么是问题？ – Eliyahu 2014-10-07 12:40:57
如何进行抓取？关于Haoop-2.5.1集群中Nutch-2.2.1的配置有一些很好的建议。一个非常大的感谢进步。 – emailfeifan 2014-10-07 14:54:30
这很明显是什么问题。你如何解决错误信息。 – 2014-11-20 07:17:24