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From: "Klemm, Michael" <michael.klemm@intel.com>
To: "cygwin@cygwin.com" <cygwin@cygwin.com>
Subject: RE: Strange Issue with Launching Cygwin bash and other Applications
Date: Sun, 15 Feb 2015 10:13:01 +0000
Message-ID: <0DAB4B4FC42EAA41802458ADA9C2F82430060C18@IRSMSX104.ger.corp.intel.com>
References: <0DAB4B4FC42EAA41802458ADA9C2F82430059DC1@IRSMSX104.ger.corp.intel.com> <447063137.20150214023937@yandex.ru>
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Dear Andrey,

> -----Original Message-----
> From: Andrey Repin [mailto:anrdaemon@yandex.ru]
> Sent: Saturday, February 14, 2015 12:40 AM
> 
> Greetings, Klemm, Michael!

Yeah, "Lastname, Firstname" is the default for our little company :-).


> > After the last restart (and maybe also after an update of Cygwin last
> > week), the first start of bash takes hideously long (about 2 minutes).
> > The same happens to programs like latexmk:
> 
> > $ time latexmk --help
> > Latexmk: This is Latexmk, John Collins, 10 January 2015, version: 4.42.
> > [... more output ...]
> > Report bugs etc to John Collins <jcc8 at psu.edu>.
> 
> > real    1m39.914s
> > user    0m0.000s
> > sys     0m0.015s
> 
> 
> > I did an strace on latexmk and it seems that something is querying the
> > Active Directory of my computers domain through the VPN:
> 
> > 1047703 1224686 [main] perl 11652 pwdgrp::fetch_account_from_windows:
> > line: < XXXXXXXXXXXXXXXXXXXX>
> > 513639 1738325 [main] perl 11652 pwdgrp::fetch_account_from_windows:
> > line: < XXXXXXXXXXXXXXXXXXXX >
> > 525120 2263445 [main] perl 11652 pwdgrp::fetch_account_from_windows:
> > line: < XXXXXXXXXXXXXXXXXXXX >
> > 522731 2786176 [main] perl 11652 pwdgrp::fetch_account_from_windows:
> > line: < XXXXXXXXXXXXXXXXXXXX >
> > 518198 3304374 [main] perl 11652 pwdgrp::fetch_account_from_windows:
> > line: < XXXXXXXXXXXXXXXXXXXX >
> 
> > [I replaced the true group/account names for privacy reasons.]
> 
> > Each query takes a little while and there are lots of them.  Some even
> > take longer than a second.  This continues for quite a while until
> latexmk finally prints its help message.
> 
> > I have found the queried the log of cygcheck.
> 
> > How can I convince Cygwin (or one of its components) that this is bad
> idea and to avoid it?
> 
> This is not a bad idea to query actual information from AD, instead of
> using potentially stale flatfile database that was used prior to 1.7.34
> release.

Yeap.  I need to apologize here, because the first mail that I received after subscribing and sending my email actually contained a link to the solution.  And I was too stupid to type the right key words into the search box of Google. :-(  

I have now changed /etc/nsswitch.conf and now everything works fine again, at the expense of not querying the AD anymore.  This seems to work fine for now, but I might run into issues later.


> However, it may be going a little too far in this regard. 

I have run mkgroup over night to see what's going on, and our company AD contains more than 22k groups (I aborted it after a while, the number might even be bigger).


> You can probably
> speed up the process. Please try the 1.7.35 (experimental) Cygwin version
> (in setup, click on the twister against "cygwin" package until the
> required version pops up).

I'll try that!  Thanks!


> P.S.
> I'm wondering, where you were last year, when the development of new
> authentication scheme released with 1.7.34 was ongoing?

I wasn't subscribed to this list :-).  


Cheers,
        -michael
Intel GmbH
Dornacher Strasse 1
85622 Feldkirchen/Muenchen, Deutschland
Sitz der Gesellschaft: Feldkirchen bei Muenchen
Geschaeftsfuehrer: Christian Lamprechter, Hannes Schwaderer, Douglas Lusk
Registergericht: Muenchen HRB 47456
Ust.-IdNr./VAT Registration No.: DE129385895
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