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Can\'t set long node name

Submitted by mfoss on Thu, 2004-11-11 18:31

Error

{
  error_logger,
  {{2004,11,11},{19,28,4}},
  'Can\'t set long node name!\nPlease check your configuration\n',[]
}

{
  error_logger,
  {{2004,11,11},{19,28,4}},
  crash_report,
  [
    [
      {pid,<0.18.0>},
      {registered_name,net_kernel},
      {error_info,{error,badarg}},
      {
        initial_call,
        {gen,init_it,[gen_server,<0.15.0>,<0.15.0>,{local,net_kernel},net_kernel,{ejabber,longnames,15000},[]]}
      },
      {ancestors,[net_sup,kernel_sup,<0.8.0>]},
      {messages,[]},
      {links,[<0.15.0>]},
      {
        dictionary,
        [{longnames,true}]
      },
      {trap_exit,true},
      {status,running},
      {heap_size,610},
      {stack_size,21},
      {reductions,2761}
    ],
    []
  ]
}

Explanation

You are starting the Erlang node, and you specify a short node name with the option -name. This tries to set a long node name, but it do not work.

Solution

Try to specify the long node name:

erl -name ejabberd@server.net ...

check your computer name and

Submitted by raraodd on Wed, 2015-12-30 07:11.

check your computer name and your short host name or alias name in /etc/hosts, match this
1. Check your computer name
[wendy@nyc123]$
nyc123 is your computer name
2. Check your short hostname
[wendy@nyc123]$ hostname -s
[wendy@nyc123]$ nyc456
This error could happen because your computer name and short host name didn't match. To match this, you can change the computer hostname or alias name.

- Change computer host name
[wendy@nyc123]$ hostname nyc456
close your terminal and open again
[wendy@nyc456]$
the computer name has changed

- Change alias name in /etc/hosts
127.0.0.1 nyc123.com nyc123
save and check again
[wendy@nyc123]$ hostname -s
[wendy@nyc123]$ nyc123

Restart your ejabberd!
[root@nyc123]$ ejabberdctl start
[root@nyc123]$ ejabberdctl status
The node 'ejabberd@nyc123.com' is started with status: started
ejabberd 15.09 is running in that node

/etc/hosts

Submitted by Skinkie on Tue, 2004-11-16 14:20.

The above error could also happen if your /etc/hosts is in a wrong format. The login prompt will be in a 'strange' format too, mybox.(none) for example.

Using DHCP but still in the need for a fancy hostname?

/etc/hosts:
127.0.0.1 mybox.mydomain mybox localhost

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