[從屬]運行，但連接名稱節點[主]

Question

我可以開始的hadoop sucess但數據節點[從屬]無法連接名稱節點[主]

2016-11-09 16:00:15,953 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: master/192.168.1.101:9000 
2016-11-09 16:00:21,957 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: master/192.168.1.101:9000. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS) 
2016-11-09 16:00:22,965 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: master/192.168.1.101:9000. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS) 

詳細的/ etc /主機

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

192.168.1.101 master 
192.168.1.102 slave1 

核心的site.xml

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

和HDFS-site.xml中

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

<property> 
<name>dfs.namenode.name.dir</name> 
<value>file:///opt/volume/namenode</value> 
</property> 

<property> 
<name>dfs.datanode.data.dir</name> 
<value>file:///opt/volume/datanode</value> 
</property> 

Answer 1

1）檢查是否防火牆限制端口

sudo iptables -L 

如果是這樣，沖洗它

要打開9000，

$ sudo iptables -A INPUT -p tcp -m tcp --dport 9000 -j ACCEPT 
$ sudo /etc/init.d/iptables save 

2）檢查任何問題的namenode日誌小號/var/log/hadoop