Solve RabbitMQ ERROR: epmd error for host “ubuntu”: address (cannot connect to host/port)

Solve RabbitMQ ERROR: epmd error for host “ubuntu”: address (cannot connect to host/port)

When installing RabbitMQ in server, I got this errors:

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Preparing to unpack .../rabbitmq-server_3.2.4-1_all.deb ...                
Unpacking rabbitmq-server (3.2.4-1) ...                                    
yProcessing triggers for man-db (2.6.7.1-1) ...                            
Processing triggers for ureadahead (0.100.0-16) ...                        
Setting up rabbitmq-server (3.2.4-1) ...                                    
 * Starting message broker rabbitmq-server                                  
 * FAILED - check /var/log/rabbitmq/startup_\{log, _err\}                  
   ...fail!                                                                
invoke-rc.d: initscript rabbitmq-server, action "start" failed.            
dpkg: error processing package rabbitmq-server (--configure):              
 subprocess installed post-installation script returned error exit status 1
Processing triggers for ureadahead (0.100.0-16) ...                        
Errors were encountered while processing:                                  
 rabbitmq-server                                                            
E: Sub-process /usr/bin/dpkg returned an error code (1)                    
ubuntu@ubuntu:~$ cat /var/log/rabbitmq/startup_                            
startup_err  startup_log                                                    
ubuntu@ubuntu:~$ cat /var/log/rabbitmq/startup_log                          
ERROR: epmd error for host "ubuntu": address (cannot connect to host/port)  
ubuntu@ubuntu:~$ cat /var/log/rabbitmq/startup_log                          
ERROR: epmd error for host "ubuntu": address (cannot connect to host/port)

The solution, set localhost on “/etc/hosts”

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127.0.0.1       localhost
192.168.0.1 ubuntu.ubuntu   ubuntu

# 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

Into

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127.0.0.1       localhost
127.0.0.1       ubuntu
192.168.0.1 ubuntu.ubuntu   ubuntu

# 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

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