hadoop的job执行异常,能解决或者告诉我hadoop的调整日志级别方法也行!

2015-01-14 02:48:59,706 INFO [AsyncDispatcher event handler] org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl: Diagnostics report from attempt_1421231566739_0003_m_000000_3: Error: java.io.IOException: Unable to initialize any output collector
at org.apache.hadoop.mapred.MapTask.createSortingCollector(MapTask.java:412)
at org.apache.hadoop.mapred.MapTask.access$100(MapTask.java:81)
at org.apache.hadoop.mapred.MapTask$NewOutputCollector.(MapTask.java:695)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:767)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)

或者有人能告诉我怎么修改hadoop的日志级别也可以!
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