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Zhijie Shen commented on MAPREDUCE-5160: ---------------------------------------- The exception observed when running aggregatewordhist: {code} 2013-04-17 11:04:13,471 FATAL [IPC Server handler 7 on 61283] org.apache.hadoop.mapred.TaskAttemptListenerImpl: Task: attempt_1366220242098_0004_m_000007_0 - exited : java.lang.RuntimeException: Error in configuring object at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:72) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:130) at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:425) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:158) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1489) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:153) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:103) ... 9 more Caused by: java.lang.RuntimeException: Error in configuring object at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:72) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:130) at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:38) ... 14 more Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:103) ... 17 more Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordHistogram$AggregateWordHistogramPlugin at org.apache.hadoop.mapreduce.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:63) at org.apache.hadoop.mapreduce.lib.aggregate.UserDefinedValueAggregatorDescriptor.createAggregator(UserDefinedValueAggregatorDescriptor.java:70) at org.apache.hadoop.mapreduce.lib.aggregate.UserDefinedValueAggregatorDescriptor.<init>(UserDefinedValueAggregatorDescriptor.java:84) at org.apache.hadoop.mapred.lib.aggregate.UserDefinedValueAggregatorDescriptor.<init>(UserDefinedValueAggregatorDescriptor.java:55) at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getValueAggregatorDescriptor(ValueAggregatorJobBase.java:58) at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.getAggregatorDescriptors(ValueAggregatorJobBase.java:69) at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.initializeMySpec(ValueAggregatorJobBase.java:78) at org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase.configure(ValueAggregatorJobBase.java:46) ... 22 more Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.examples.AggregateWordHistogram$AggregateWordHistogramPlugin at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:249) at org.apache.hadoop.mapreduce.lib.aggregate.UserDefinedValueAggregatorDescriptor.createInstance(UserDefinedValueAggregatorDescriptor.java:58) ... 29 more {code} > Aggregatewordcount and aggregatewordhist in hadoop-1 examples can not find > their inner classes when running on Yarn > ------------------------------------------------------------------------------------------------------------------- > > Key: MAPREDUCE-5160 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-5160 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Reporter: Zhijie Shen > Assignee: Zhijie Shen > > Aggregatewordcount and Aggregatewordhist of hadoop-1 cannot run on hadoop-2 > due to > org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJob.createValueAggregatorJob(String > args[], Class<?> caller) is not available on hadoop-2 (see MAPREDUCE-5159). > After I changed Aggregatewordcount and Aggregatewordhist to use > createValueAggregatorJob(String args[], Class<? extends > ValueAggregatorDescriptor>[] descriptors), which is available on hadoop-2, > the two examples could be accepted and run on Yarn. > However, the two examples still failed, because their inner classes, > WordCountPlugInClass and AggregateWordHistogramPlugin, cannot be found in > runtime, respectively. Both the plugin classes extend > org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorBaseDescriptor. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira