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Hadoop 50070 port can not be opened, how to troubleshoot?

Hadoop 50070 is the web management page of hdfs. When building a Hadoop cluster environment, some big data developers and technicians will encounter the situation that the Hadoop 50070 port cannot be opened. There are many reasons for this problem. To solve this problem, you need to troubleshoot from the following aspects!

1. Troubleshoot whether Namenode is deployed successfully

You can check whether Namenode is deployed successfully by either command / etc/init.d/hadoop-0.20-namenode status or jps. If Namenode is not deployed successfully, you need to redeploy Namenode;. If Namenode; has been successfully deployed, please proceed to the second step!

two。 Troubleshoot whether datanode is deployed successfully

You can check whether the datanode is deployed successfully by using the jps command. If the deployment is not successful, find the problem node to solve it. If the deployment is successful, proceed to step 3.

3. Check to see if the firewall is on

Check whether the firewall is turned on properly. If the firewall is turned off, you can set it in the following ways:

Netstat-ant # View the local development port

127.0.0.1 50070

In hdfs-site.xml, change the binding IP of the open port:

Dfs.http.address

0.0.0.0:50070

Change the binding IP to 0.0.0.0 instead of the local loopback IP, so that the public network can access port 50070 of the machine.

The above is the normal troubleshooting order and solution that the Hadoop 50070 port cannot be opened. If all three troubleshooting items are set normally, but the problem has not been solved, you can check the browser cache.

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