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From: "Habermann, David (D)" <DAHabermann AT dow DOT com>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: RE: occasional failure to look up
Date: Tue, 18 Nov 2014 15:49:00 +0000
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> Do you login with your Microsoft account?

I am logged into my workstation using the id "DOW\U074036".  Of course the services I mentioned to not run under my ID, but instead under "SYSTEM" (except sshd, which uses privsep)

> Is 1125370 your primary group id?  Can you please paste the output of `id'?

No, it is not my primary group ID...instead it is my uid (see below).  Here are the first few lines of my "id" output (the entire output is huge, as we make excessive use of AD groups here):

uid=1125370(U074036) gid=1049089(Domain Users) groups=1049089(Domain Users),197609(EW54384R82P30V+Debugger Users),197617(EW54384R82P30V+DorincoServerAdmins),197619(EW54384R82P30V+Offer Remote Assistance Helpers),555(Remote Desktop Users),545(Users),4(INTERACTIVE),66049(CONSOLE LOGON),11(Authenticated Users),15(This Organization),66048(LOCAL),1275934(InternetUsers),1360436(VPNUsers),1716061(CRM-SHARE-FC),1059330(ep-fc),1062240(ps-sixsigma-change),1882511(TDCC-Users),1716058(CRM-DB-FC),1854531(app-inst-acrobatpro-4),1241820(synergyadm44-chg),2261836(GDC_DR-SHR),1328857(FsmUsers1-G),1058762(Dow-Chem-Emp-List),2269908(GRP-WEB-SHR),18896

....and an abbreviated listing from 
$ /cygdrive/c/Windows/System32/whoami /user /groups /fo list

USER INFORMATION
----------------

User Name: dow\u074036
SID:       S-1-5-21-1060284298-861567501-682003330-76794


GROUP INFORMATION
-----------------

Group Name: Everyone
Type:       Well-known group
SID:        S-1-1-0
Attributes: Mandatory group, Enabled by default, Enabled group

Group Name: EW54384R82P30V\Debugger Users
Type:       Alias
SID:        S-1-5-21-2043008819-1135015519-32816079-1001
Attributes: Mandatory group, Enabled by default, Enabled group

Group Name: EW54384R82P30V\DorincoServerAdmins
Type:       Alias
SID:        S-1-5-21-2043008819-1135015519-32816079-1009
Attributes: Mandatory group, Enabled by default, Enabled group

Group Name: EW54384R82P30V\Offer Remote Assistance Helpers
Type:       Alias
SID:        S-1-5-21-2043008819-1135015519-32816079-1011
Attributes: Mandatory group, Enabled by default, Enabled group

Group Name: BUILTIN\Administrators
Type:       Alias
SID:        S-1-5-32-544
Attributes: Group used for deny only

Group Name: BUILTIN\Remote Desktop Users
Type:       Alias
SID:        S-1-5-32-555
Attributes: Mandatory group, Enabled by default, Enabled group

Group Name: BUILTIN\Users
Type:       Alias
SID:        S-1-5-32-545
Attributes: Mandatory group, Enabled by default, Enabled group

Group Name: NT AUTHORITY\INTERACTIVE
Type:       Well-known group


> Stopping the terminal and restarting cygserver is not sufficient?
> Also, does this also happen if you don't start cygserver at all?

I've not tried either of these ... and I'm not sure if it happens at every reboot now or not (I rarely reboot).  I'll see if I can reproduce it.

> When the problem occurs, can you provide an strace from id?
>
>  $ strace -o id.trace /usr/bin/id

Will do if I can get it to reproduce.  Will try later today, I have "day job" stuff to do at the moment.