[Pkg-samba-maint] DO NOT REPLY [Bug 7259] Winbind eventually locks "forever" if one of ActiveDirectory refuses all connections

[samba-bugs at samba.org]

https://bugzilla.samba.org/show_bug.cgi?id=7259





------- Comment #6 from drewskiwooskie at gmail.com  2010-04-02 14:03 CST -------
After fixing the dns issue I decided to try this again, with all ips returned
for the domain being reachable. 
one server worked great (this time the one that had the problem below is
working great and the other one that worked fine before is having weird
problems).
Here is the problem:
ssh logins hang, as it is trying to do group lookups. getent groups/passwd
hangs. However, if I were to strace -p <pid> of the main winbind process, group
lookups begin to work so long as I am attached that pid (I thought I was crazy
at first but after 15 minutes of nothing but that I have completely verified
that is the behavior I am seeing). I would be more than happy to take a video
capture to show this. I wanted to get an strace to see where it was hanging,
and everytime I attach to the processes, it immediately returns correct values. 
If I do not attach to the process via strace, getent group/passwd only returns
local users. 

strace here: http://pastebin.com/dg08uzdp

logs:

  winbindd_getgrent_done: done with 17 groups
[2010/04/02 19:54:17.120958, 10] winbindd/winbindd.c:662(wb_request_done)
  wb_request_done[20109:GETGRENT]: NT_STATUS_OK
[2010/04/02 19:54:17.122203, 10]
winbindd/winbindd.c:723(winbind_client_response_written)
  winbind_client_response_written[20109:GETGRENT]: deliverd response to client
[2010/04/02 19:54:17.124385, 10] winbindd/winbindd.c:600(process_request)
  process_request: Handling async request 20109:GETGRENT
[2010/04/02 19:54:17.125035,  3]
winbindd/winbindd_getgrent.c:51(winbindd_getgrent_send)
  [20109]: getgrent
[2010/04/02 19:54:17.125669,  5]
winbindd/winbindd_getgrent.c:149(winbindd_getgrent_recv)
  getgrent failed: NT_STATUS_NO_MORE_ENTRIES
[2010/04/02 19:54:17.126308, 10] winbindd/winbindd.c:662(wb_request_done)
  wb_request_done[20109:GETGRENT]: NT_STATUS_NO_MORE_ENTRIES
[2010/04/02 19:54:17.127456, 10]
winbindd/winbindd.c:723(winbind_client_response_written)
  winbind_client_response_written[20109:GETGRENT]: deliverd response to client
[2010/04/02 19:54:17.129106, 10] winbindd/winbindd.c:600(process_request)
  process_request: Handling async request 20109:ENDGRENT
[2010/04/02 19:54:17.129893, 10] winbindd/winbindd.c:662(wb_request_done)
  wb_request_done[20109:ENDGRENT]: NT_STATUS_OK
[2010/04/02 19:54:17.131047, 10]
winbindd/winbindd.c:723(winbind_client_response_written)
  winbind_client_response_written[20109:ENDGRENT]: deliverd response to client
[2010/04/02 19:54:17.132178,  6]
winbindd/winbindd.c:823(winbind_client_request_read)
  closing socket 32, client exited


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