Shulou(Shulou.com)06/03 Report--

Start-dfs.sh

All processes have been started successfully

Master:

65456 Jps

64881 NameNode

65057 DataNode

7380 NodeManager

65276 SecondaryNameNode

Slave:

3607 DataNode

7380 NodeManager

3675 Jps

Under hadoop:

Slaves file settings:

Master

Slave1

Slave2

-

Netstat-anp | grep 9000

Tcp 00 192.168.1.2009000 LISTEN 64881/java 0.0.0.0

Tcp 00 192.168.1.200:9000 192.168.1.200:42846 ESTABLISHED 64881/java

Tcp 00 192.168.1.200 tcp 42853 192.168.1.200 9000 TIME_WAIT-

Tcp 00 192.168.1.200:42846 192.168.1.200:9000 ESTABLISHED 65057/java

Problem description:

Under the http://master:50070/ monitoring page.

Live nodes is 1.

Only master's datanode can see that the other two slave have processes but cannot connect to master.

And there is no current file generated under slave and dfs/data.

View the log as follows:

2016-11-08 13 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: master/192.168.0.100:9000. Already tried 6 time (s); retry policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1000 MILLISECONDS)

The reason is that centos7

Turn off selinux and iptables. No, turn off the dynamic firewall.

Turn off the firewall: * very important *

# systemctl status firewalld.service-check the status of the firewall

# systemctl stop firewalld.service-turn off the firewall

# systemctl disable firewalld.service-permanently turn off the firewall

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.