[英]hadoop classes other than main not found
我在VM上運行hadoop Cloudera CHD4.5。 從《 Manhout在行動》第9-10章中,我嘗試創建一個自定義的Lucene分析器。 我的分析器是在自己的類中定義的。 當我創建JAR時,存在該類。 當我通過命令行執行時,我不斷獲取java.lang.IllegalStateException:java.lang.ClassNotFoundException:my.org.MyAnalyzer。
HADOOP_CLASSPATH可以將缺少的類傳遞給客戶端,但是我的問題是myanalyzer類似乎沒有傳遞給map / reduce JVM。 我尚未創建自己的map / reduce類,也未從主類運行Job。 我正在使用現有的mahout類來實現我的目標。 在我的代碼中,如果我例如使用WhitespaceAnalyzer而不是我的分析器,則沒有問題。
這是我的分析儀課
public final class MyAnalyzer extends Analyzer {
public final StandardAnalyzer stdAnalyzer = new StandardAnalyzer(Version.LUCENE_36);
@Override
public TokenStream tokenStream(String fieldName, Reader reader) {
return stdAnalyzer.tokenStream(fieldName, reader);
}
}
有任何想法嗎?
我嘗試了Maven,我得到了相同的結果。 但是,我可能在pom.xml文件中沒有正確的依賴性。
-libjars無法正常工作,因為我未在代碼中使用GenericOptionsParser方法。
現在正在工作。 我在pom.xml中使用了maven-assembly-plugin並創建了相應的job.xml組裝作業。
的pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>my.org</groupId>
<artifactId>maven_NewKmeans</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>maven_NewKmeans</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<hadoop.version>2.0.0-mr1-cdh4.0.1</hadoop.version>
<mahout.version>0.7</mahout.version>
<mahout.groupid>org.apache.mahout</mahout.groupid>
</properties>
<repositories>
<repository>
<id>cloudera-releases</id>
<url>https://repository.cloudera.com/artifactory/cloudera-repos</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.4.3</version>
<configuration>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<id>job</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<descriptors>
<descriptor>src/main/assembly/job.xml</descriptor>
</descriptors>
</configuration>
</execution>
<execution>
<id>my-jar-with-dependencies</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<pluginManagement>
</pluginManagement>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-client</artifactId>
<version>${hadoop.version}</version>
</dependency>
<dependency>
<groupId>${mahout.groupid}</groupId>
<artifactId>mahout-core</artifactId>
<version>${mahout.version}</version>
</dependency>
</dependencies>
</project>
組裝job.xml
<assembly
xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly- plugin/assembly/1.1.0
http://maven.apache.org/xsd/assembly-1.1.0.xsd">
<id>job</id>
<formats>
<format>jar</format>
</formats>
<includeBaseDirectory>false</includeBaseDirectory>
<dependencySets>
<dependencySet>
<unpack>true</unpack>
<scope>runtime</scope>
<outputDirectory>/</outputDirectory>
<excludes>
<exclude>org.apache.hadoop:hadoop-core</exclude>
</excludes>
</dependencySet>
</dependencySets>
<fileSets>
<fileSet>
<directory>${basedir}/target/classes</directory>
<outputDirectory>/</outputDirectory>
<excludes>
<exclude>*.jar</exclude>
</excludes>
</fileSet>
<fileSet>
<directory>${basedir}/target/classes</directory>
<outputDirectory>/</outputDirectory>
<includes>
<include>driver.classes.default.props</include>
</includes>
</fileSet>
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