hadoop cdh4 eclipse plugin

1)download eclipse

2)解压 eclipse

3)安装与配置 Ant 修 改 /etc/profile 文件

export ANT_HOME=[path]/apache-ant-1.7.1

export PATH=$PATH$:$ANT_HOME/bin

source /etc/profile

5)hadoop-2.0.0-cdh4.6.0/src/hadoop-mapreduce1-project/src/contrib/eclipse-plugin/build.properties

增加

eclipse.home=[path]/eclipse

reactor.repo=https://repository.cloudera.com/content/repositories/snapshots

version=2.0.0-cdh4.4.0

参考：http://stackoverflow.com/questions/18852338/ant-build-for-eclipse-cant-resolve-log4j 

否则会有提示：

[ivy:resolve]       :: commons-logging#commons-logging;1.1.1: several problems occurred while resolving dependency: commons-logging#commons-logging;1.1.1 {common=[default]}:
[ivy:resolve]   reactor-repo: unable to get resource for commons-logging#commons-logging;1.1.1: res=${reactor.repo}/commons-logging/commons-logging/1.1.1/commons-logging-1.1.1.pom: java.net.MalformedURLException: no protocol: ${reactor.repo}/commons-logging/commons-logging/1.1.1/commons-logging-1.1.1.pom
[ivy:resolve]   several problems occurred while resolving dependency: org.apache.commons#commons-parent;5 {}:
[ivy:resolve]   reactor-repo: unable to get resource for org/apache/commons#commons-parent;5: res=${reactor.repo}/org/apache/commons/commons-parent/5/commons-parent-5.pom: java.net.MalformedURLException: no protocol: ${reactor.repo}/org/apache/commons/commons-parent/5/commons-parent-5.pom
[ivy:resolve]   several problems occurred while resolving dependency: org.apache#apache;4 {}:
[ivy:resolve]   reactor-repo: unable to get resource for org/apache#apache;4: res=${reactor.repo}/org/apache/apache/4/apache-4.pom: java.net.MalformedURLException: no protocol: ${reactor.repo}/org/apache/apache/4/apache-4.pom
[ivy:resolve]   reactor-repo: unable to get resource for org/apache#apache;4: res=${reactor.repo}/org/apache/apache/4/apache-4.jar: java.net.MalformedURLException: no protocol: ${reactor.repo}/org/apache/apache/4/apache-4.jar
[ivy:resolve]       :: log4j#log4j;1.2.16: several problems occurred while resolving dependency: log4j#log4j;1.2.16 {common=[master]}:
[ivy:resolve]   reactor-repo: unable to get resource for log4j#log4j;1.2.16: res=${reactor.repo}/log4j/log4j/1.2.16/log4j-1.2.16.pom: java.net.MalformedURLException: no protocol: ${reactor.repo}/log4j/log4j/1.2.16/log4j-1.2.16.pom
[ivy:resolve]   reactor-repo: unable to get resource for log4j#log4j;1.2.16: res=${reactor.repo}/log4j/log4j/1.2.16/log4j-1.2.16.jar: java.net.MalformedURLException: no protocol: ${reactor.repo}/log4j/log4j/1.2.16/log4j-1.2.16.jar
[ivy:resolve]       ::::::::::::::::::::::::::::::::::::::::::::::
[ivy:resolve] 
[ivy:resolve] :: USE VERBOSE OR DEBUG MESSAGE LEVEL FOR MORE DETAILS

6)hadoop-2.0.0-cdh4.6.0/src/hadoop-mapreduce1-project/src/contrib/eclipse-plugin/build-contrib.xml

增加

<project name="hadoopbuildcontrib" xmlns:ivy="antlib:org.apache.ivy.ant">
  <property name="eclipse.home"location="C:\eclipse"/>  --添加部分
  <property name="version" value="1.0.4"/>              --添加部分
  <property name="name" value="${ant.project.name}"/>
  <property name="root" value="${basedir}"/>
  <property name="hadoop.root" location="${root}/../../../"/>

7)修改${HADOOP_HOME}/src/contrib/eclipse-plugin/build.xml文件

<fileset dir="[path to lib of mapreduce1]">               --添加部分
直接全路径吧，这是示例：<fileset dir="./share/hadoop/mapreduce1/lib/">
  <include name="hadoop*.jar"/>             --添加部分
</fileset>                                    --添加部分

注：如还有缺少，继续添加其他包的引入

8)hadoop-2.0.0-cdh4.6.0/src/hadoop-mapreduce1-project/src/contrib/eclipse-plugin目录下

ant jar

按提示有未定义的，再引入jar库

9)错误提示：case需要常量，修改如下文件

./src/hadoop-mapreduce1-project/src/contrib/eclipse-plugin/src/java/org/apache/hadoop/eclipse/server/HadoopJob.java

static JobState ofInt(int state) {

    switch (state) {

    //  case JobStatus.PREP:

    // 

    //  case JobStatus.FAILED:

    // 

    }   

10)编译通过后，在

hadoop-2.0.0-cdh4.6.0/src/hadoop-mapreduce1-project/build/contrib/eclipse-plugin

包含 hadoop-eclipse-plugin-2.0.0.jar 拷贝到eclipse的目录下重启elcipse

如果是yarn 框架的还是用新的mapre2的吧～～～～～