router died. Shutting down server.

[stuartly]

Hi, I installed jabberd2 as the tutoral (https://github.com/jabberd2/jabberd2/wiki/InstallGuide-QuickStartGuide).

When I want to start the jabberd using command "sudo /usr/local/bin/jabberd" , it show "ERROR: router died. Shutting down server."

when I try the debug command ""sudo /usr/local/bin/jabberd -D", the result is as follow:
JBRD: debug on
JBRD: version(2.x.dev)
JBRD: config_dir(/usr/local/etc)
JBRD: LaunchJob: router -> /usr/local/bin/router -c /usr/local/etc/router.xml -D
JBRD: LaunchJob: sm -> /usr/local/bin/sm -c /usr/local/etc/sm.xml -D
JBRD: LaunchJob: s2s -> /usr/local/bin/s2s -c /usr/local/etc/s2s.xml -D
JBRD: LaunchJob: c2s -> /usr/local/bin/c2s -c /usr/local/etc/c2s.xml -D
ERROR: router died. Shutting down server.
JBRD: sending TERM to 100774 : c2s
JBRD: sending TERM to 100772 : s2s
JBRD: sending TERM to 100771 : sm
JBRD: sending TERM to 100770 : router
Shutting down.
: %

Furthermore, I check the system log in " /var/log/syslog" , related information is as follow:

Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'template-roster' added to chain 'user-create' (order 1 inde
308 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'active' added to chain 'user-delete' (order 0 index 20 seq
309 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'announce' added to chain 'user-delete' (order 1 index 12 se
310 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'offline' added to chain 'user-delete' (order 2 index 11 seq
311 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'privacy' added to chain 'user-delete' (order 3 index 3 seq
312 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'roster' added to chain 'user-delete' (order 4 index 4 seq 3
313 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'vacation' added to chain 'user-delete' (order 5 index 5 seq
314 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'status' added to chain 'user-delete' (order 6 index 0 seq 4
315 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'iq-last' added to chain 'user-delete' (order 7 index 1 seq
316 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'iq-private' added to chain 'user-delete' (order 8 index 8 s
317 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'iq-vcard' added to chain 'user-delete' (order 9 index 6 seq
318 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'iq-version' added to chain 'disco-extend' (order 0 index 17
319 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: module 'help' added to chain 'disco-extend' (order 1 index 18 seq 1
320 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: version: jabberd sm 2.x.dev
321 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: [localhost.localdomain] configured
322 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: attempting connection to router at 127.0.0.1, port=5347
323 Jun 21 10:14:23 CSLS06U jabberd/router[121373]: [127.0.0.1, port=50886] connect
324 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: shutting down
325 Jun 21 10:14:23 CSLS06U jabberd/sm[7540]: connection to router closed
326 Jun 21 10:14:23 CSLS06U jabberd/s2s[7541]: starting up (interval=60, queue=60, keepalive=0, idle=86400)
327 Jun 21 10:14:23 CSLS06U jabberd/router[121373]: [127.0.0.1, port=50886] disconnect
328 Jun 21 10:14:23 CSLS06U jabberd/s2s[7541]: process id is 7541, written to /usr/local/var/jabberd/pid/s2s.pid
329 Jun 21 10:14:23 CSLS06U jabberd/s2s[7541]: attempting connection to router at 127.0.0.1, port=5347
330 Jun 21 10:14:23 CSLS06U jabberd/s2s[7541]: shutting down
331 Jun 21 10:14:23 CSLS06U jabberd/router[121373]: [127.0.0.1, port=50888] connect
332 Jun 21 10:14:23 CSLS06U jabberd/s2s[7541]: connection to router closed
333 Jun 21 10:14:23 CSLS06U jabberd/router[121373]: [127.0.0.1, port=50888] disconnect

It will be grateful if some one could tell me how to solve the problem.
Thanks.