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我正在运行hadoop 2.5.1,并且从服务器连接到主服务器时出现问题。我的目标是建立一个hadoop集群。我希望有人能够帮助,我已经过了这么久了! :)即使服务正在运行并且端口已打开,Hadoop从站也无法连接到主服务器
这是干什么来从站的日志文件:
2014-10-18 22:14:07,368 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: master/192.168.0.104:8020
这是我的核心-site.xml中-file(相同的主机和从机):
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://master/</value>
</property>
</configuration>
这是我的主人 - 文件((几乎)相同的主机和从机)..我硬编码地址有没有任何成功:
127.0.0.1 localhost
192.168.0.104 xubuntu: xubuntu
192.168.0.104 master
192.168.0.194 slave
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
Netstats FR OM主:
[email protected]:/usr/local/hadoop/logs$ netstat -atnp | grep 8020
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 192.168.0.104:8020 0.0.0.0:* LISTEN 26917/java
tcp 0 0 192.168.0.104:52114 192.168.0.104:8020 ESTABLISHED 27046/java
tcp 0 0 192.168.0.104:8020 192.168.0.104:52114 ESTABLISHED 26917/java
Nmap的由主到主:由从到主
Starting Nmap 6.40 (http://nmap.org) at 2014-10-18 22:36 EEST
Nmap scan report for master (192.168.0.104)
Host is up (0.000072s latency).
rDNS record for 192.168.0.104: xubuntu:
PORT STATE SERVICE
8020/tcp open unknown
..和NMAP(即使当该端口是开放时,从没有连接到它。) :
[email protected]:/usr/local/hadoop/logs$ nmap master -p 8020
Starting Nmap 6.40 (http://nmap.org) at 2014-10-18 22:35 EEST
Nmap scan report for master (192.168.0.104)
Host is up (0.14s latency).
PORT STATE SERVICE
8020/tcp open unknown
这是怎么回事?问题不是关于防火墙..我也读过每一个线程都没有任何成功。我对此感到沮丧。:(