[Spacewalk-list] Internal Server Error while see pkgs detail

[Dewangga Bachrul Alam]

Hello!

I got something weird on my SpaceWalk 2.3 server and use CentOS 6.7.
When I click pkgs detail to see the information of the pkgs, the sw
server said that Internal Server Error. (i don't know where's the log
file located to send traceback/debug file).

https://sw.url/rhn/software/packages/Details.do?pid=165416

Tried to restart `spacewalk-service restart`, the sm service failed to
stop. Here's the traceback.

$ spacewalk-service restart
Shutting down spacewalk services...
Stopping RHN Taskomatic...
Stopped RHN Taskomatic.
Stopping cobbler daemon:                                   [  OK  ]
Stopping rhn-search...
Stopped rhn-search.
Shutting down osa-dispatcher:                              [  OK  ]
Stopping httpd:                                            [  OK  ]
Stopping tomcat6: waiting for processes 9653 to exit
                                                           [  OK  ]
Terminating jabberd processes ...
Stopping s2s:                                              [  OK  ]
Stopping c2s:                                              [  OK  ]
Stopping sm:                                               [FAILED]
Stopping router:                                           [  OK  ]
Done.
Starting spacewalk services...
Initializing jabberd processes ...
Starting router:                                           [  OK  ]
Starting sm:                                               [  OK  ]
Starting c2s:                                              [  OK  ]
Starting s2s:                                              [  OK  ]
Starting tomcat6:                                          [  OK  ]
Waiting for tomcat to be ready ...
Starting httpd:                                            [  OK  ]
Starting osa-dispatcher:                                   [  OK  ]
Starting rhn-search...
Starting cobbler daemon:                                   [  OK  ]
Starting RHN Taskomatic...
Done.

What is sm services? And what for? After restarting spacewalk service,
the pkgs detail normal again. Is it normal?