hadoop wordcount并将文件上传到hdfs

Question

大家好，我是 hadoop 的新手，我以伪模式安装 hadoop。配置文件在这里

核心站点.xml

<configuration>

   <property>
      <name>fs.default.name </name>
      <value> hdfs://localhost:9000 </value> 
   </property>

</configuration>

hdfs-site.xml

<configuration>

   <property>
      <name>dfs.replication</name>
      <value>1</value>
   </property>

   <property>
      <name>dfs.name.dir</name>
      <value>file:///home/hadoop_usr/hadoopinfra/hdfs/namenode </value>
   </property>

   <property>
      <name>dfs.data.dir</name> 
      <value>file:///home/hadoop_usr/hadoopinfra/hdfs/datanode </value> 
   </property>

</configuration>

并且成功启动datanode和namenode

Now i want to put my file into hdfs by using following way

出了什么问题为什么我收到错误消息。请帮我解决这个问题

If i using following way to put file into hdfs that time command is working fine. now i appand hdfs url. Please help me why i getting error in first way. Because when in running my wordcount.jar that time am also getting error message when i mentioned data.txt as input file on which operation sould be performed.

提前致谢。

Answer 1

对 data/data.txt 的第一个 put 操作不起作用的原因可能是您的 hdfs 中还没有文件夹 data。您可以使用 hadoop fs -mkdir/data 创建它。