运行hadoop example aggregatewordcount 出错的解决办法

用以下命令运行aggregatewordcount

hadoop jar ../hadoop-examples-1.1.2.jar  aggregatewordcount /word/cat_word.txt /temp/aggregatewordcount5 1 textinputformat -jar ../hadoop-examples-1.1.2.jar 

出错如下:
13/08/22 16:49:53 INFO util.NativeCodeLoader: Loaded the native-hadoop library
13/08/22 16:49:53 WARN snappy.LoadSnappy: Snappy native library not loaded
13/08/22 16:49:53 INFO mapred.FileInputFormat: Total input paths to process : 1
13/08/22 16:49:53 INFO mapred.JobClient: Running job: job_201308221557_0013
13/08/22 16:49:54 INFO mapred.JobClient:  map 0% reduce 0%
13/08/22 16:49:59 INFO mapred.JobClient: Task Id : attempt_201308221557_0013_m_000000_0, Status : FAILED
java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:432)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 9 more
Caused by: java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
    ... 14 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 17 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:57)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createAggregator(UserDefinedValueAggregatorDescriptor.java:64)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.<init>(UserDefinedValueAggregatorDescriptor.java:76)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getValueAggregatorDescriptor(ValueAggregatorJobBase.java:54)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getAggregatorDescriptors(ValueAggregatorJobBase.java:65)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.initializeMySpec(ValueAggregatorJobBase.java:74)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.configure(ValueAggregatorJobBase.java:42)
    ... 22 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:247)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:52)
    ... 28 more

13/08/22 16:49:59 INFO mapred.JobClient: Task Id : attempt_201308221557_0013_m_000001_0, Status : FAILED
java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:432)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 9 more
Caused by: java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
    ... 14 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 17 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:57)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createAggregator(UserDefinedValueAggregatorDescriptor.java:64)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.<init>(UserDefinedValueAggregatorDescriptor.java:76)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getValueAggregatorDescriptor(ValueAggregatorJobBase.java:54)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getAggregatorDescriptors(ValueAggregatorJobBase.java:65)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.initializeMySpec(ValueAggregatorJobBase.java:74)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.configure(ValueAggregatorJobBase.java:42)
    ... 22 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:247)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:52)
    ... 28 more

13/08/22 16:50:04 INFO mapred.JobClient: Task Id : attempt_201308221557_0013_m_000000_1, Status : FAILED
java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:432)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 9 more
Caused by: java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
    ... 14 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 17 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:57)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createAggregator(UserDefinedValueAggregatorDescriptor.java:64)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.<init>(UserDefinedValueAggregatorDescriptor.java:76)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getValueAggregatorDescriptor(ValueAggregatorJobBase.java:54)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getAggregatorDescriptors(ValueAggregatorJobBase.java:65)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.initializeMySpec(ValueAggregatorJobBase.java:74)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.configure(ValueAggregatorJobBase.java:42)
    ... 22 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:247)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:52)
    ... 28 more

13/08/22 16:50:04 INFO mapred.JobClient: Task Id : attempt_201308221557_0013_m_000001_1, Status : FAILED
java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:432)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 9 more
Caused by: java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
    ... 14 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 17 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:57)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createAggregator(UserDefinedValueAggregatorDescriptor.java:64)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.<init>(UserDefinedValueAggregatorDescriptor.java:76)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getValueAggregatorDescriptor(ValueAggregatorJobBase.java:54)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getAggregatorDescriptors(ValueAggregatorJobBase.java:65)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.initializeMySpec(ValueAggregatorJobBase.java:74)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.configure(ValueAggregatorJobBase.java:42)
    ... 22 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:247)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:52)
    ... 28 more

13/08/22 16:50:08 INFO mapred.JobClient: Task Id : attempt_201308221557_0013_m_000000_2, Status : FAILED
java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:432)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 9 more
Caused by: java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
    ... 14 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 17 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:57)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createAggregator(UserDefinedValueAggregatorDescriptor.java:64)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.<init>(UserDefinedValueAggregatorDescriptor.java:76)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getValueAggregatorDescriptor(ValueAggregatorJobBase.java:54)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getAggregatorDescriptors(ValueAggregatorJobBase.java:65)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.initializeMySpec(ValueAggregatorJobBase.java:74)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.configure(ValueAggregatorJobBase.java:42)
    ... 22 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:247)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:52)
    ... 28 more

13/08/22 16:50:08 INFO mapred.JobClient: Task Id : attempt_201308221557_0013_m_000001_2, Status : FAILED
java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:432)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 9 more
Caused by: java.lang.RuntimeException: Error in configuring object
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
    at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
    ... 14 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
    ... 17 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:57)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createAggregator(UserDefinedValueAggregatorDescriptor.java:64)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.<init>(UserDefinedValueAggregatorDescriptor.java:76)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getValueAggregatorDescriptor(ValueAggregatorJobBase.java:54)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getAggregatorDescriptors(ValueAggregatorJobBase.java:65)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.initializeMySpec(ValueAggregatorJobBase.java:74)
    at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.configure(ValueAggregatorJobBase.java:42)
    ... 22 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordCount$WordCountPlugInClass
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:247)
    at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:52)
    ... 28 more

13/08/22 16:50:14 INFO mapred.JobClient: Job complete: job_201308221557_0013
13/08/22 16:50:14 INFO mapred.JobClient: Counters: 7
13/08/22 16:50:14 INFO mapred.JobClient:   Job Counters
13/08/22 16:50:14 INFO mapred.JobClient:     SLOTS_MILLIS_MAPS=34129
13/08/22 16:50:14 INFO mapred.JobClient:     Total time spent by all reduces waiting after reserving slots (ms)=0
13/08/22 16:50:14 INFO mapred.JobClient:     Total time spent by all maps waiting after reserving slots (ms)=0
13/08/22 16:50:14 INFO mapred.JobClient:     Launched map tasks=8
13/08/22 16:50:14 INFO mapred.JobClient:     Data-local map tasks=8
13/08/22 16:50:14 INFO mapred.JobClient:     SLOTS_MILLIS_REDUCES=0
13/08/22 16:50:14 INFO mapred.JobClient:     Failed map tasks=1
13/08/22 16:50:14 INFO mapred.JobClient: Job Failed: # of failed Map Tasks exceeded allowed limit. FailedCount: 1. LastFailedTask: task_201308221557_0013_m_000000
java.io.IOException: Job failed!
    at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1327)
    at org.apache.hadoop.examples.AggregateWordCount.main(AggregateWordCount.java:74)
    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.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
    at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
    at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64)
    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)

解决办法:

在aggregatewordcount 后面添加-libjars /usr/local/hadoop/hadoop-1.1.2/hadoop-examples-1.1.2.jar 好像只能在这个地方添加才有效.

 hadoop jar ../hadoop-examples-1.1.2.jar  aggregatewordcount -libjars /usr/local/hadoop/hadoop-1.1.2/hadoop-examples-1.1.2.jar  /word/cat_word.txt /temp/aggregatewordcount7 1 textinputformat

把-libjars /usr/local/hadoop/hadoop-1.1.2/hadoop-examples-1.1.2.jar 放在最后不行.

 hadoop jar ../hadoop-examples-1.1.2.jar  aggregatewordcount /word/cat_word.txt /temp/aggregatewordcount8 1 textinputformat -libjars /usr/local/hadoop/hadoop-1.1.2/hadoop-examples-1.1.2.jar