Hi, I got the error information below. What's wrong? What I/O exception? root@cx1:/home/cx/software/Hadoop/hadoop-0.20.2# bin/hadoop jar Retrieval.jar Retrieval protein/b.txt protein/a.txt protein/output 11/08/11 18:31:24 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same. 11/08/11 18:31:24 INFO mapred.FileInputFormat: Total input paths to process : 1 11/08/11 18:31:25 INFO mapred.JobClient: Running job: job_201108111412_0007 11/08/11 18:31:26 INFO mapred.JobClient: map 0% reduce 0% 11/08/11 18:31:36 INFO mapred.JobClient: Task Id : attempt_201108111412_0007_m_000000_0, Status : FAILED Error: null 11/08/11 18:31:38 INFO mapred.JobClient: Task Id : attempt_201108111412_0007_m_000001_0, Status : FAILED Error: null 11/08/11 18:31:43 INFO mapred.JobClient: Task Id : attempt_201108111412_0007_m_000000_1, Status : FAILED Error: null 11/08/11 18:31:45 INFO mapred.JobClient: Task Id : attempt_201108111412_0007_m_000001_1, Status : FAILED Error: null 11/08/11 18:31:49 INFO mapred.JobClient: Task Id : attempt_201108111412_0007_m_000000_2, Status : FAILED Error: null 11/08/11 18:31:51 INFO mapred.JobClient: Task Id : attempt_201108111412_0007_m_000001_2, Status : FAILED Error: null 11/08/11 18:31:58 INFO mapred.JobClient: Job complete: job_201108111412_0007 11/08/11 18:31:58 INFO mapred.JobClient: Counters: 3 11/08/11 18:31:58 INFO mapred.JobClient: Job Counters 11/08/11 18:31:58 INFO mapred.JobClient: Launched map tasks=8 11/08/11 18:31:58 INFO mapred.JobClient: Data-local map tasks=8 11/08/11 18:31:58 INFO mapred.JobClient: Failed map tasks=1 Exception in thread "main" java.io.IOException: Job failed! at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1252) at Retrieval.main(Retrieval.java:41) 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.RunJar.main(RunJar.java:156)
-- Regards! Jun Tan
