无法在Hadoop中启动namenode？

Question

我在Windows7中配置Hadoop是从教程中设置单个节点集群开始的。当运行hdfs namenode-format来格式化namenode时，它会抛出类似的异常：当start-all.cmd自动强制windows namenode时，我可以打开地址为http：//localhost:50070的namenode GUI。

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

<configuration>
   <property>
       <name>dfs.replication</name>
       <value>1</value>
   </property>
   <property>
       <name>dfs.namenode.name.dir</name>
       <value>C:/hadoop/data/namenode</value>
   </property>
   <property>
       <name>dfs.datanode.data.dir</name>
       <value>C:/hadoop/data/datanode</value>
   </property>
</configuration>

<configuration>
    <property>
       <name>mapreduce.framework.name</name>
       <value>yarn</value>
    </property>
</configuration>

yarn-site.xml

<configuration>
   <property>
       <name>yarn.nodemanager.aux-services</name>
       <value>mapreduce_shuffle</value>
   </property>
   <property>
       <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
       <value>org.apache.hadoop.mapred.ShuffleHandler</value>
   </property>
</configuration>

Answer 1

将以下属性更改为：

<property>
   <name>dfs.namenode.name.dir</name>
   <value>C:/hadoop/data/namenode</value>
</property>
<property>
   <name>dfs.datanode.data.dir</name>
   <value>C:/hadoop/data/datanode</value>
</property>

致：

<property>
   <name>dfs.namenode.name.dir</name>
   <value>/hadoop/data/namenode</value>
</property>
<property>
   <name>dfs.datanode.data.dir</name>
   <value>/hadoop/data/datanode</value>
</property>