无法启动CDH4辅助名称节点：NameNode地址的URI无效 [英] Unable to start CDH4 secondary name node: Invalid URI for NameNode address

问题描述

我一直在尝试设置hadoop的CDH4安装。我有12台机器，标有hadoop01 - hadoop12，名称节点，作业跟踪器，所有数据节点都已正常启动。我可以查看dfshealth.jsp并查看它是否找到了所有的数据节点。

I've been trying to setup a CDH4 installation of hadoop. I have 12 machines, labled hadoop01 - hadoop12, and the namenode, job tracker, and all data nodes have started fine. I'm able to view dfshealth.jsp and see that it's found all the data nodes.

但是，每当我尝试启动辅助名称节点时，它都会发出异常：

However, whenever I try to start the secondary name node it gives an exception:

Starting Hadoop secondarynamenode:                         [  OK  ]
starting secondarynamenode, logging to /var/log/hadoop-hdfs/hadoop-hdfs-secondarynamenode-hadoop02.dev.terapeak.com.out
Exception in thread "main" java.lang.IllegalArgumentException: Invalid URI for NameNode address (check fs.defaultFS): file:/// has no authority.
        at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:324)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:312)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.getServiceAddress(NameNode.java:305)
        at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.initialize(SecondaryNameNode.java:222)
        at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.<init>(SecondaryNameNode.java:186)
        at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.main(SecondaryNameNode.java:578)

这是我的hdfs站点辅助名称节点上的.xml文件：

This is my hdfs-site.xml file on the secondary name node:

<configuration>
  <property>
    <name>dfs.name.dir</name>
    <value>/data/1/dfs/nn</value>
  </property>
  <property>
    <name>dfs.namenode.http-address</name>
    <value>10.100.20.168:50070</value>
    <description>
      The address and the base port on which the dfs NameNode Web UI will listen.
      If the port is 0, the server will start on a free port.
    </description>
  </property>
  <property>
    <name>dfs.namenode.checkpoint.check.period</name>
    <value>3600</value>
  </property>
  <property>
    <name>dfs.namenode.checkpoint.txns</name>
    <value>40000</value>
  </property>
  <property>
    <name>dfs.namenode.checkpoint.dir</name>
    <value>/var/lib/hadoop-hdfs/cache</value>
  </property>
  <property>
    <name>dfs.namenode.checkpoint.edits.dir</name>
    <value>/var/lib/hadoop-hdfs/cache</value>
 </property>
 <property>
    <name>dfs.namenode.num.checkpoints.retained</name>
    <value>1</value>
  </property>
 <property>
    <name>mapreduce.jobtracker.restart.recover</name>
    <value>true</value>
  </property>

</configuration>

给dfs.namenode.http-address赋值看起来有点不对，但我不知道是什么。它应该从http：//还是hdfs：//开始？我试着在lynx中调用10.100.20.168:50070，并显示一个页面。任何想法？

It would seem like something is wrong with the value given to dfs.namenode.http-address, but I'm not sure what. Should it start with http:// or hdfs://? I tried calling 10.100.20.168:50070 in lynx and it displayed a page. Any ideas?

推荐答案

看起来我缺少辅助名称节点上的core-site.xml配置。

Looks like I was missing the core-site.xml configuration on the secondary name node. Added that and the process started properly.

core-site.xml：

core-site.xml:

<configuration>
 <property>
  <name>fs.defaultFS</name>
  <value>hdfs://10.100.20.168/</value>
 </property>
</configuration>

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