Hi Libo, MRAppMaster is not able to load the yarn related jar files.
Is this the classpath using by MRAppMaster or any other process? "/opt/hadoop/hadoop-2.0.0-cdh4.3.0/conf:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/common/lib/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/common/*:/contrib/capacity-scheduler/*.jar:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/hdfs:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/hdfs/lib/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/hdfs/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/yarn/lib/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/yarn/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/mapreduce2/lib/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/mapreduce/*" If this is not the MRAppMaster process classpath, can you try to get the MRAppMaster java process classpath. Thanks Devaraj k From: Yu, Libo [mailto:libo...@citi.com] Sent: 11 July 2013 01:30 To: 'user@hadoop.apache.org' Subject: NoClassDefFoundError: org/apache/hadoop/yarn/service/CompositeService Hi, I tried to run the wordcount example with yarn. Here is the command line: hadoop jar share/hadoop/mapreduce2/hadoop-mapreduce-examples-2.0.0-cdh4.3.0.jar wordcount /user/lyu/wordcount/input /user/lyu/wordcount/output But I got this exception: Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/yar n/service/CompositeService at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.yarn.service.CompositeService 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) ... 12 more Could not find the main class: org.apache.hadoop.mapreduce.v2.app.MRAppMaster. Program will exit Here is conent of the CLASSPATH used by java: /opt/hadoop/hadoop-2.0.0-cdh4.3.0/conf:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/common/lib/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/common/*:/contrib/capacity-scheduler/*.jar:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/hdfs:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/hdfs/lib/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/hdfs/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/yarn/lib/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/yarn/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/mapreduce2/lib/*:/opt/hadoop/hadoop-2.0.0-cdh4.3.0/share/hadoop/mapreduce/* Here is the console output: 13/07/09 20:43:07 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 13/07/09 20:43:07 INFO service.AbstractService: Service:org.apache.hadoop.yarn.client.YarnClientImpl is inited. 13/07/09 20:43:07 INFO service.AbstractService: Service:org.apache.hadoop.yarn.client.YarnClientImpl is started. 13/07/09 20:43:08 INFO input.FileInputFormat: Total input paths to process : 0 13/07/09 20:43:08 INFO mapreduce.JobSubmitter: number of splits:0 13/07/09 20:43:08 WARN conf.Configuration: mapred.jar is deprecated. Instead, use mapreduce.job.jar 13/07/09 20:43:08 WARN conf.Configuration: mapred.output.value.class is deprecated. Instead, use mapreduce.job.output.value.class 13/07/09 20:43:08 WARN conf.Configuration: mapreduce.combine.class is deprecated. Instead, use mapreduce.job.combine.class 13/07/09 20:43:08 WARN conf.Configuration: mapreduce.map.class is deprecated. Instead, use mapreduce.job.map.class 13/07/09 20:43:08 WARN conf.Configuration: mapred.job.name is deprecated. Instead, use mapreduce.job.name 13/07/09 20:43:08 WARN conf.Configuration: mapreduce.reduce.class is deprecated. Instead, use mapreduce.job.reduce.class 13/07/09 20:43:08 WARN conf.Configuration: mapred.input.dir is deprecated. Instead, use mapreduce.input.fileinputformat.inputdir 13/07/09 20:43:08 WARN conf.Configuration: mapred.output.dir is deprecated. Instead, use mapreduce.output.fileoutputformat.outputdir 13/07/09 20:43:08 WARN conf.Configuration: mapred.map.tasks is deprecated. Instead, use mapreduce.job.maps 13/07/09 20:43:08 WARN conf.Configuration: mapred.output.key.class is deprecated. Instead, use mapreduce.job.output.key.class 13/07/09 20:43:08 WARN conf.Configuration: mapred.working.dir is deprecated. Instead, use mapreduce.job.working.dir 13/07/09 20:43:09 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1373416798858_0001 13/07/09 20:43:09 INFO client.YarnClientImpl: Submitted application application_1373416798858_0001 to ResourceManager at host1.libo.com/192.168.10.1:8032 13/07/09 20:43:09 INFO mapreduce.Job: The url to track the job: http://host1.libo.com:8088/proxy/application_1373416798858_0001/ 13/07/09 20:43:09 INFO mapreduce.Job: Running job: job_1373416798858_0001 13/07/09 20:43:12 INFO mapreduce.Job: Job job_1373416798858_0001 running in uber mode : false 13/07/09 20:43:12 INFO mapreduce.Job: map 0% reduce 0% 13/07/09 20:43:12 INFO mapreduce.Job: Job job_1373416798858_0001 failed with state FAILED due to: Application application_1373416798858_0001 failed 1 times due to AM Container for appattempt_1373416798858_0001_000001 exited with exitCode: 1 due to: .Failing this attempt.. Failing the application. 13/07/09 20:43:12 INFO mapreduce.Job: Counters: 0 The paths for CompositeService and MRAppMaster are in the CLASSPATH and I checked the jar files and did find the class files. Anybody knows why? Thanks. Regards, Libo