Tan, Can you check your userlogs via http://host:50030 for your job ID job_201108111412_0007 and see if any of the tasks carry helpful messages among its syslogs, stdout and stderr?
TaskTracker logs are another place to check, if the above doesn't have anything. 2011/8/11 谭军 <tanjun_2...@163.com>: > 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.run Job(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 > > -- Harsh J
