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POClassNotFoundException while executing mapreduce program
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copied!<p>I was trying to execute the word count program in eclipse.</p> <p>But while executing the program I am getting the following error</p> <pre><code>log4j:ERROR Could not instantiate class [org.apache.hadoop.log.metrics.EventCounter]. java.lang.ClassNotFoundException: org.apache.hadoop.log.metrics.EventCounter at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:190) at org.apache.log4j.helpers.Loader.loadClass(Loader.java:198) at org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConverter.java:327) at org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.java:124) at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:785) at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:768) at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:648) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:514) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:580) at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:526) at org.apache.log4j.LogManager.<clinit>(LogManager.java:127) at org.apache.log4j.Logger.getLogger(Logger.java:104) at org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:289) at org.apache.commons.logging.impl.Log4JLogger.<init>(Log4JLogger.java:109) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.apache.commons.logging.impl.LogFactoryImpl.createLogFromClass(LogFactoryImpl.java:1116) at org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementation(LogFactoryImpl.java:914) at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:604) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:336) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:310) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:685) at org.apache.hadoop.conf.Configuration.<clinit>(Configuration.java:150) at mapreducetest.main(mapreducetest.java:43) log4j:ERROR Could not instantiate appender named "EventCounter". 13/09/02 11:17:18 INFO security.UserGroupInformation: JAAS Configuration already set up for Hadoop, not re-installing. 13/09/02 11:17:18 INFO jvm.JvmMetrics: Initializing JVM Metrics with processName=JobTracker, sessionId= 13/09/02 11:17:18 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 13/09/02 11:17:18 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same. 13/09/02 11:17:18 WARN mapred.JobClient: No job jar file set. User classes may not be found. See JobConf(Class) or JobConf#setJar(String). 13/09/02 11:17:18 INFO mapred.JobClient: Cleaning up the staging area file:/tmp/hadoop-hduser/mapred/staging/hduser201346744/.staging/job_local201346744_0001 Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/thirdparty/guava/common/collect/LinkedListMultimap at org.apache.hadoop.hdfs.SocketCache.<init>(SocketCache.java:48) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:240) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:208) at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:89) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1563) at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:67) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:1597) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1579) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:228) at org.apache.hadoop.fs.Path.getFileSystem(Path.java:183) at org.apache.hadoop.mapred.FileOutputFormat.checkOutputSpecs(FileOutputFormat.java:106) at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:986) at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:945) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1157) at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:945) at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:919) at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1368) at mapreducetest.main(mapreducetest.java:59) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.thirdparty.guava.common.collect.LinkedListMultimap at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 20 more </code></pre>

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