Re: "git clone --depth=2 git://git.sv.gnu.org/gnulib" hangs

From: Jeff King <peff@peff.net>
Date: Apr 26, 2011, 07:59 UTC
Message-ID: <20110426075917.GA26874@sigill.intra.peff.net>
In-Reply-To: <87aafedqjp.fsf@rho.meyering.net>

On Mon, Apr 25, 2011 at 10:28:10PM +0200, Jim Meyering wrote:

> We've had a report that this command is hanging:
> 
>     git clone --depth=2 git://git.sv.gnu.org/gnulib

It might be related to this deadlock which impacts upload-pack on a server with pthreads serving a shallow clone:

  http://thread.gmane.org/gmane.comp.version-control.git/170789

Unfortunately the fix I posted is not yet in any released version of git. It is in the current 'next'.

> It appears to be something specific to the gnulib repository,
> since I can do a shallow clone of e.g., this one just fine:
> 
>     git://git.savannah.gnu.org/parallel.git

It's a race condition on filling up a rev-list buffer, so certain repos may be more prone to triggering the race than others.

-Peff