各位，我在构建hadoop集群时遇到了一个小问题
我的节点安装centos 6.5、java1.7.60和hadoop 2.2.0
我想造一个主人和三个奴隶
我试着这样建造它
但最后，我尝试启动namenode和datanode
我的/etc/主机如下：

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

10.10.10.10 master
10.10.10.11 slave1
10.10.10.12 slave2
10.10.10.13 slave3

就像我打字时这样：

$ hadoop namenode -fromat:

java.net.UnknownHostException: hadoop01.hadoopcluster: hadoop01.hadoopcluster
    at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
    at org.apache.hadoop.net.DNS.resolveLocalHostname(DNS.java:264)
    at org.apache.hadoop.net.DNS.<clinit>(DNS.java:57)
    at org.apache.hadoop.hdfs.server.namenode.NNStorage.newBlockPoolID(NNStorage.java:914)
    at org.apache.hadoop.hdfs.server.namenode.NNStorage.newNamespaceInfo(NNStorage.java:550)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:144)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:837)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1213)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1320)
Caused by: java.net.UnknownHostException: hadoop01.hadoopcluster
    at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
    at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
    at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
    ... 8 more
14/07/01 16:50:46 WARN net.DNS: Unable to determine address of the host-falling back to "localhost" address
java.net.UnknownHostException: hadoop01.hadoopcluster: hadoop01.hadoopcluster
    at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
    at org.apache.hadoop.net.DNS.resolveLocalHostIPAddress(DNS.java:287)
    at org.apache.hadoop.net.DNS.<clinit>(DNS.java:58)
    at org.apache.hadoop.hdfs.server.namenode.NNStorage.newBlockPoolID(NNStorage.java:914)
    at org.apache.hadoop.hdfs.server.namenode.NNStorage.newNamespaceInfo(NNStorage.java:550)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:144)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:837)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1213)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1320)
Caused by: java.net.UnknownHostException: hadoop01.hadoopcluster
    at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
    at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
    at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
    ... 8 more

并尝试发出start-dfs.sh和start-yarn.sh：

$ start-dfs.sh
14/07/01 16:55:23 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [master]
master: namenode running as process 2395. Stop it first.
slave2: starting datanode, logging to /opt/hadoop/logs/hadoop-hadoop-datanode-hadoop03.hadopcluster.out
slave1: starting datanode, logging to /opt/hadoop/logs/hadoop-hadoop-datanode-hadoop02.hadopcluster.out
slave3: starting datanode, logging to /opt/hadoop/logs/hadoop-hadoop-datanode-hadoop04.hadopcluster.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: secondarynamenode running as process 2564. Stop it first.
14/07/01 16:55:31 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

$ start-yarn.sh
starting yarn daemons
starting resourcemanager, logging to /opt/hadoop/logs/yarn-hadoop-resourcemanager-hadoop01.hadoopcluster.out
slave1: starting nodemanager, logging to /opt/hadoop/logs/yarn-hadoop-nodemanager-hadoop02.hadopcluster.out
slave3: starting nodemanager, logging to /opt/hadoop/logs/yarn-hadoop-nodemanager-hadoop04.hadopcluster.out
slave2: starting nodemanager, logging to /opt/hadoop/logs/yarn-hadoop-nodemanager-hadoop03.hadopcluster.out

和类型jps：

$ jps
2564 SecondaryNameNode
5591 Jps
2395 NameNode

我只是这样，没有数据节点，节点管理器，资源管理器。。。等等，我设置的时候有什么地方不对吗？谁能给我提个建议吗，谢谢！