作业提交后classnotfoundexception

4dbbbstv  于 2021-06-03  发布在  Hadoop
关注(0)|答案(4)|浏览(477)

我正在尝试使用SpringData-hadoop从本地机器的ide在远程集群上执行mr代码
//hadoop 1.1.2、spring 3.2.4、spring data hadoop 1.0.0
尝试了以下版本：
hadoop 1.2.1、spring 4.0.1、spring data hadoop 2.0.2
applicationcontext.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:hdp="http://www.springframework.org/schema/hadoop"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 
    http://www.springframework.org/schema/hadoop http://www.springframework.org/schema/hadoop/spring-hadoop.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">

    <context:property-placeholder location="resources/hadoop.properties" />

    <hdp:configuration file-system-uri="${hd.fs}" job-tracker-uri="${hd.jobtracker.uri}">

    </hdp:configuration>

    <hdp:job id="wc-job" mapper="com.hadoop.basics.WordCounter.WCMapper"
        reducer="com.hadoop.basics.WordCounter.WCReducer" input-path="${wordcount.input.path}"
        output-path="${wordcount.output.path}" user="bigdata">
    </hdp:job>

    <hdp:job-runner id="myjobs-runner" job-ref="wc-job"
        run-at-startup="true" />

    <hdp:resource-loader id="resourceLoader" uri="${hd.fs}"
        user="bigdata" />   
</beans>

wordcounter.java语言：

package com.hadoop.basics;

import java.io.IOException;
import java.util.StringTokenizer;

import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class WordCounter {

    private static IntWritable one = new IntWritable(1);

    public static class WCMapper extends Mapper<Text, Text, Text, IntWritable> {

        @Override
        protected void map(
                Text key,
                Text value,
                org.apache.hadoop.mapreduce.Mapper<Text, Text, Text, IntWritable>.Context context)
                throws IOException, InterruptedException {
            // TODO Auto-generated method stub
            StringTokenizer strTokenizer = new StringTokenizer(value.toString());
            Text token = new Text();

            while (strTokenizer.hasMoreTokens()) {
                token.set(strTokenizer.nextToken());
                context.write(token, one);
            }
        }
    }

    public static class WCReducer extends
            Reducer<Text, IntWritable, Text, IntWritable> {
        @Override
        protected void reduce(
                Text key,
                Iterable<IntWritable> values,
                org.apache.hadoop.mapreduce.Reducer<Text, IntWritable, Text, IntWritable>.Context context)
                throws IOException, InterruptedException {
            // TODO Auto-generated method stub

            int sum = 0;

            for (IntWritable value : values) {
                sum += value.get();
            }

            context.write(key, new IntWritable(sum));
        }
    }

    public static void main(String[] args) {
        AbstractApplicationContext context = new ClassPathXmlApplicationContext(
                "applicationContext.xml", WordCounter.class);
        System.out.println("Word Count Application Running");
        context.registerShutdownHook();
    }
}

输出为：

Aug 23, 2013 11:07:48 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1815338: startup date [Fri Aug 23 11:07:48 IST 2013]; root of context hierarchy
Aug 23, 2013 11:07:48 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [com/hadoop/basics/applicationContext.xml]
Aug 23, 2013 11:07:48 AM org.springframework.core.io.support.PropertiesLoaderSupport loadProperties
INFO: Loading properties file from class path resource [resources/hadoop.properties]
Aug 23, 2013 11:07:48 AM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@7c197e: defining beans [org.springframework.context.support.PropertySourcesPlaceholderConfigurer#0,hadoopConfiguration,wc-job,myjobs-runner,resourceLoader]; root of factory hierarchy
Aug 23, 2013 11:07:49 AM org.springframework.data.hadoop.mapreduce.JobExecutor$2 run
INFO: Starting job [wc-job]
Aug 23, 2013 11:07:49 AM org.apache.hadoop.mapred.JobClient copyAndConfigureFiles
WARNING: No job jar file set.  User classes may not be found. See JobConf(Class) or JobConf#setJar(String).
Aug 23, 2013 11:07:49 AM org.apache.hadoop.mapreduce.lib.input.FileInputFormat listStatus
INFO: Total input paths to process : 1
Aug 23, 2013 11:07:50 AM org.apache.hadoop.util.NativeCodeLoader <clinit>
WARNING: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Aug 23, 2013 11:07:50 AM org.apache.hadoop.io.compress.snappy.LoadSnappy <clinit>
WARNING: Snappy native library not loaded
Aug 23, 2013 11:07:52 AM org.apache.hadoop.mapred.JobClient monitorAndPrintJob
INFO: Running job: job_201308231532_0002
Aug 23, 2013 11:07:53 AM org.apache.hadoop.mapred.JobClient monitorAndPrintJob
INFO:  map 0% reduce 0%
Aug 23, 2013 11:08:12 AM org.apache.hadoop.mapred.JobClient monitorAndPrintJob
INFO: Task Id : attempt_201308231532_0002_m_000000_0, Status : FAILED
java.lang.RuntimeException: java.lang.ClassNotFoundException: com.hadoop.basics.WordCounter$WCMapper
    at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:849)
    at org.apache.hadoop.mapreduce.JobContext.getMapperClass(JobContext.java:199)
    at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:719)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.ClassNotFoundException: com.hadoop.basics.WordCounter$WCMapper
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:802)
    at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:847)
    ... 8 more

Aug 23, 2013 11:08:33 AM org.apache.hadoop.mapred.JobClient monitorAndPrintJob
INFO: Task Id : attempt_201308231532_0002_m_000000_1, Status : FAILED
java.lang.RuntimeException: java.lang.ClassNotFoundException: com.hadoop.basics.WordCounter$WCMapper
    at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:849)
    at org.apache.hadoop.mapreduce.JobContext.getMapperClass(JobContext.java:199)
    at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:719)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.ClassNotFoundException: com.hadoop.basics.WordCounter$WCMapper
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:802)
    at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:847)
    ... 8 more

Aug 23, 2013 11:08:51 AM org.apache.hadoop.mapred.JobClient monitorAndPrintJob
INFO: Task Id : attempt_201308231532_0002_m_000000_2, Status : FAILED
java.lang.RuntimeException: java.lang.ClassNotFoundException: com.hadoop.basics.WordCounter$WCMapper
    at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:849)
    at org.apache.hadoop.mapreduce.JobContext.getMapperClass(JobContext.java:199)
    at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:719)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.ClassNotFoundException: com.hadoop.basics.WordCounter$WCMapper
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:802)
    at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:847)
    ... 8 more

Aug 23, 2013 11:09:24 AM org.apache.hadoop.mapred.JobClient monitorAndPrintJob
INFO: Job complete: job_201308231532_0002
Aug 23, 2013 11:09:24 AM org.apache.hadoop.mapred.Counters log
INFO: Counters: 7
Aug 23, 2013 11:09:24 AM org.apache.hadoop.mapred.Counters log
INFO:   Job Counters 
Aug 23, 2013 11:09:24 AM org.apache.hadoop.mapred.Counters log
INFO:     SLOTS_MILLIS_MAPS=86688
Aug 23, 2013 11:09:24 AM org.apache.hadoop.mapred.Counters log
INFO:     Total time spent by all reduces waiting after reserving slots (ms)=0
Aug 23, 2013 11:09:24 AM org.apache.hadoop.mapred.Counters log
INFO:     Total time spent by all maps waiting after reserving slots (ms)=0
Aug 23, 2013 11:09:24 AM org.apache.hadoop.mapred.Counters log
INFO:     Launched map tasks=4
Aug 23, 2013 11:09:24 AM org.apache.hadoop.mapred.Counters log
INFO:     Data-local map tasks=4
Aug 23, 2013 11:09:24 AM org.apache.hadoop.mapred.Counters log
INFO:     SLOTS_MILLIS_REDUCES=0
Aug 23, 2013 11:09:24 AM org.apache.hadoop.mapred.Counters log
INFO:     Failed map tasks=1
Aug 23, 2013 11:09:24 AM org.springframework.data.hadoop.mapreduce.JobExecutor$2 run
INFO: Completed job [wc-job]
Aug 23, 2013 11:09:24 AM org.springframework.beans.factory.support.DefaultSingletonBeanRegistry destroySingletons
INFO: Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@7c197e: defining beans [org.springframework.context.support.PropertySourcesPlaceholderConfigurer#0,hadoopConfiguration,wc-job,myjobs-runner,resourceLoader]; root of factory hierarchy
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myjobs-runner': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Job wc-job] failed to start; status=FAILED
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1482)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:628)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:197)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:172)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:158)
    at com.hadoop.basics.WordCounter.main(WordCounter.java:58)
Caused by: java.lang.IllegalStateException: Job wc-job] failed to start; status=FAILED
    at org.springframework.data.hadoop.mapreduce.JobExecutor$2.run(JobExecutor.java:219)
    at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:49)
    at org.springframework.data.hadoop.mapreduce.JobExecutor.startJobs(JobExecutor.java:168)
    at org.springframework.data.hadoop.mapreduce.JobExecutor.startJobs(JobExecutor.java:160)
    at org.springframework.data.hadoop.mapreduce.JobRunner.call(JobRunner.java:52)
    at org.springframework.data.hadoop.mapreduce.JobRunner.afterPropertiesSet(JobRunner.java:44)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1541)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1479)
    ... 13 more

什么配置。我错过了吗？是否真的可以使用spring数据远程提交hadoop作业而不创建jar等？

hadoopspringspring-dataspring-data-hadoop

4条答案

按热度按时间
fafcakar

fafcakar1#

右键单击项目，build path->configure build path。选择libraries选项卡，单击addexternaljars并复制hadoop目录中所有必需的jar文件。我想，这会解决你的问题。

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xvw2m8pv

xvw2m8pv2#

我得到了同样的问题，然后分离了mapper和reducer类的工作，并在 applicationContext.xml :

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:util="http://www.springframework.org/schema/util"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:hdp="http://www.springframework.org/schema/hadoop" xmlns:batch="http://www.springframework.org/schema/batch"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/hadoop http://www.springframework.org/schema/hadoop/spring-hadoop.xsd
     http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context.xsd
     http://www.springframework.org/schema/batch http://www.springframework.org/schema/batch/spring-batch.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">

    <context:property-placeholder location="classpath:application.properties" />
    <hdp:configuration namenode-principal="hdfs://xx.yy.com" rm-manager-uri="xx.yy.com"
        security-method="kerb" user-keytab="location" rm-manager-principal="username"
        user-principal="username">
        fs.default.name=${fs.default.name}
        mapred.job.tracker=${mapred.job.tracker}
    </hdp:configuration>

    <hdp:job id="wordCountJobId" input-path="${input.path}"
        output-path="${output.path}" jar-by-class="com.xx.poc.Application"
        mapper="com.xx.poc.Map" reducer="com.xx.poc.Reduce" />

    <hdp:job-runner id="wordCountJobRunner" job-ref="wordCountJobId"
        run-at-startup="true" />
</beans>
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kh212irz

kh212irz3#

我在这里的第一个hadoop工作也遇到了同样的问题，解决方法是在eclipse中编译jar文件。
当您想在eclipse中将java项目导出为jar文件时，有两个选项可用：

Extract required libraries into generated JAR
Package required libraries into generated JAR

第一个选择解决了我的问题，也可能解决了你的问题。

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csbfibhn

csbfibhn4#

你可以试试 jar-by-class 属性来定位jar并让hadoop将jar上传到tasktracker。

<hdp:job id="wc-job" mapper="com.hadoop.basics.WordCounter.WCMapper"
    reducer="com.hadoop.basics.WordCounter.WCReducer"
    input-path="${wordcount.input.path}"
    jar-by-class="com.hadoop.basics.WordCounter"
    output-path="${wordcount.output.path}" user="bigdata">
</hdp:job>

最后，wcmapper和wcreducer应该是静态的，否则它们不能由hadoop创建。

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