Hi,
I'm trying to connect to a remote Hadoop cluster from my local Windows machine via STS.
applicationContext.xml :
Wordcounter.java :
When I run the WordCounter class from STS(partial output) :
I'm trying to connect to a remote Hadoop cluster from my local Windows machine via STS.
applicationContext.xml :
Code:
<?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>Code:
package com.hadoop.basics;
import java.io.IOException;
import java.util.StringTokenizer;
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 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 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();
}
}Code:
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
