Hadoop OPS (1) Noroutetohostexception:no route to host

This error often occurs when a user uploads data to HDFs

HDFs. dfsclient:Exception in Createblockoutputstream Java. net. noroutetohostexception:No route to host

In this case, the online solution is usually to tell the firewall to shut down, as to which host the firewall does not mention.

To view the log file, just that no route to host does not mention the port, the solution is to shut down the firewall for all hosts, Namenode and slave nodes. This is true if only the firewall problem for the host Namenode is turned off.

#service iptables Stop

Or

#chkconfig iptables on/off

Turn off SELinux

Vi/etc/selinux/config

Change the selinux=enforcing to:

Selinux=disabled

This article is from the "Longan" blog, please be sure to keep this source http://xulongping.blog.51cto.com/5676840/1606053

Hadoop OPS (1) Noroutetohostexception:no route to host