On Feb 21, 2011, at 1:00 AM, Mike Dubman wrote: > Mercurial uses "Copytree" to copy fresh checked-out copy to the build > location.
This statement threw me for a little while; I had to go to the code to figure it out. It's not Mercurial.pm that uses copytree; it looks like SCM.pm sets up a pointer to use copytree later...? Can you send your MPI Get and MPI Install sections to help understand what is going on here? I tried to dig into the code a bit, but it's been (literally) years since I looked at these parts of the code; it looks like the specific code paths are going to be driven by your ini file. > These are messages coming from mtt during problematic situation: > > Debug message stating that post-copy completed (should be applied AFTER copy > to the build location): > > >> copytree running post_copy command: > > Debug message stating that copying completed --> race > > >> copytree finished copying Actually, looking at lib/MTT/Common/Copytree.pm, it looks like this sequence of messages is normal in Copytree::PrepareForInstall...? I.e., the Debug statement with ">> copytree finished copying" is actually output after the post-copy command, not before. Perhaps it's just the location of this debug statement that is confusing / incorrect... > > > On Fri, Feb 18, 2011 at 6:26 PM, Jeff Squyres <jsquy...@cisco.com> wrote: > Hmm -- I'm having difficulty understanding the exact scenario here. > > Are you using the Mercurial SCM module, or copytree? > > I don't think that I have used the Mercurial SCM module before -- I believe > Ethan added that. Ethan -- does SCM/Mercurial work well for you? > > > > On Feb 18, 2011, at 2:06 AM, Mike Dubman wrote: > > > > > 1. post_copy fails because does not find some files which should be already > > copied. > > 2. In the mtt debug output, (attached in original post) you can see that > > "post_copy" is executed before "copytree" has finished. > > > > >> copytree running post_copy command: > > ... > > ... > > > > >> copytree finished copying > > > > On Fri, Feb 18, 2011 at 12:23 AM, Jeff Squyres <jsquy...@cisco.com> wrote: > > On Feb 10, 2011, at 2:36 PM, Mike Dubman wrote: > > > > > There is a race condition in SCM, Mercurial module when used from MPI GET > > > phase: > > > > > > - scm_post_copy hook can be started before MPI GET completed copy of > > > fetched tree into install location. > > > > How have you verified this? > > > > > - This leads to mtt failure, because post_copy starts too early (tree was > > > not copied yet) and fails. > > > - adding sleeps to post_copy hook - helps. > > > - does copytree used during mtt get phase have async behave? > > > > No, it shouldn't. Everything is serial. > > > > > > > > > > > ---------------- from the mtt -d -v output --------------------- > > > > > > copytree running post_copy command: > > > ... > > > ... > > > > > > >> copytree finished copying > > > ---------------------------------------------------------------------------- > > > > > > > > > Please suggest. > > > > > > Thanks > > > > > > M > > > > > > > > > > > > _______________________________________________ > > > mtt-devel mailing list > > > mtt-de...@open-mpi.org > > > http://www.open-mpi.org/mailman/listinfo.cgi/mtt-devel > > > > > > -- > > Jeff Squyres > > jsquy...@cisco.com > > For corporate legal information go to: > > http://www.cisco.com/web/about/doing_business/legal/cri/ > > > > > > _______________________________________________ > > mtt-devel mailing list > > mtt-de...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/mtt-devel > > > > > -- > Jeff Squyres > jsquy...@cisco.com > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ > > -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
