按官方文档配置Hadoop Single Node Setup 运行出错ZipException.

 

 

按官方文档配置Hadoop Single Node Setup 运行出错. (http://hadoop.apache.org/common/docs/current/single_node_setup.html#Supported+Platforms)

 

$ bin/hadoop jar hadoop-*-examples.jar grep input output 'dfs[a-z.]+'
Exception in thread "main" java.io.IOException: Error opening job jar: hadoop-*-examples.jar
    at org.apache.hadoop.util.RunJar.main(RunJar.java:130)
Caused by: java.util.zip.ZipException: error in opening zip file
    at java.util.zip.ZipFile.open(Native Method)
    at java.util.zip.ZipFile.(ZipFile.java:127)
    at java.util.jar.JarFile.(JarFile.java:135)
    at java.util.jar.JarFile.(JarFile.java:72)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:128)

 

两个小原因：

 

1. 配置环境变量

export HADOOP_HOME=/data/study/hadoop/hadoop-0.21.0
export HADOOP_CONF_DIR=$HADOOP_HOME/conf

 

2 jar文件写全名

$ bin/hadoop jar hadoop-mapred-examples-0.21.0.jar grep input output 'dfs[a-z.]+'

 

初次使用，原来Hadoop这么容易配置和使用，一小会就能搞定，赞。

仔细学习一下

 

看看效果先