[RHEL5] User can't log in winbind server.

Issue

• The customer uses winbind and Active Directory for user management.
• Some users couldn't log in winbind server during about 10:30 to 11:14 (smbd and winbindd restart) on October 10.
• And the following smbd.log messages are suspected as the cause because they were logged during the period of the phenomenon.

[2012/10/10 10:22:35.936827,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms
[2012/10/10 10:27:35.936954,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms
[2012/10/10 10:32:35.937275,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms
[2012/10/10 10:37:35.937446,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms
[2012/10/10 10:42:35.938742,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms
[2012/10/10 10:47:35.939441,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms
[2012/10/10 10:52:35.939431,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms
[2012/10/10 10:57:35.940252,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms
[2012/10/10 11:02:35.940226,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms
[2012/10/10 11:07:35.941063,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms
[2012/10/10 11:12:35.941892,  1] winbindd/winbindd_util.c:289(trustdom_recv)
  Could not receive trustdoms

• The messages, "Could not receive trustdoms" relates to this phenomenon?
• If yes, what is the root cause of the messages?