RE: trouble on windows network share

Here's one more data point. It suggests that the problem is due to either Cygwin or possibly Git 1.7.9.


My Ubuntu box is actually a VM, hosted by my windows box in VMWare Player.

So, I tried using the VMWare shared folder feature, to mount the Windows U: drive (which is physically on the WD NAS box) as /mnt/hgfs/Host-U on Ubuntu.
Then, I tried linux on the Ubuntu box, fully expecting it to fail as it trampolined through Windows connection to the NAS box).

But, it worked fine.

So, at this point, it became likely that the problem is tied to the different version of Git that I have on the two machines:
- On Ubuntu, git version 1.7.10.4
- On Windows, Cygwin's git version 1.7.9 (which appears to be the latest version for Cygwin).

So, I installed Git on Windows from http://git-scm.com/download/win. Git version 1.8.1.msysgit.1

Triumph: Git on windows works with this git but, on the same file and repo, fails with Cygwin git.

So, either something relevant changed in Git 1.7.10, or (more likely) this is a Cygwin issue.


Jason, are you also using Cygwin git?  Are you also using a WD NAS?

David

-----Original Message-----
From: Pyeron, Jason J CTR (US) [mailto:jason.j.pyeron.ctr@mail.mil] 
Sent: Monday, May 06, 2013 4:11 PM
To: Thomas Rast; David Goldfarb
Cc: git@vger.kernel.org
Subject: RE: trouble on windows network share

-----Original Message-----
From: Thomas Rast
Sent: Monday, May 06, 2013 5:42 AM

David Goldfarb [off-list ref] writes:

quoted

Git works correctly under Linux (Ubuntu 12.04; git 1.7.9.5).  I've

attached the strace outputs. (Note: for reasons that are probably
irrelevant, I needed to run the commands sudo'd. Shout back if this is
an issue).

quoted

Under Windows 7, Cygwin git 1.7.9, commit fails:
  U:\foo>git commit -m "added foo2"
  error: unable to find 0b89efdeef245ed6a0a7eacc5c578629a141f856
  fatal: 0b89efdeef245ed6a0a7eacc5c578629a141f856 is not a valid

object

quoted

For what it's worth, note that the file does exist.
  U:\foo>ls -l .git/objects/0b
  total 1024
  -rwxrw-r-- 1 ???????? ???????? 74 May  5 01:15

89efdeef245ed6a0a7eacc5c578629a141f856

quoted

(I'm not sure why the permissions are trashed. Seems to be a Cygwin

thing, or maybe my Cygwin config. The "??????" also  appears on local
files, and I believe also with files on the old Buffalo drive, so I
don't think it is relevant to the problem).  Just in case, here's the
same dir, as seen from the Ubuntu VM:

quoted

  deg@ubuntu:/mnt/users/foo$ ls -l .git/objects/0b
  total 64
  -rwxr-xr-x 0 root root 74 May  5 01:15

89efdeef245ed6a0a7eacc5c578629a141f856

quoted

Again, note that there is some user permissions lossage here. I don't

know enough about Linux mount or CIFS, and apparently did the mount in
a way that everything seems to appear to be stuck owned by root. (same
problem I hinted at above). Hope this is not relevant to the problem.

quoted

Here's how the same directory looks, when I'm ssh'd into the NAS box

itself:

quoted

   CentralPark:/shares/Users/foo# ls -l .git/objects/0b
  total 64
  -rwxrw-r-- 1 deg share 74 May  5 01:15

89efdeef245ed6a0a7eacc5c578629a141f856

quoted

In any event, the symptoms don't seem to be a permissions problem, so

all this extra info is probably just a red herring, I hope.

Hrm.  What about what Jeff already asked of the OP (and AFAICS never
got
a reply)?

If referring to me, then yes but it was too big for the list.

} If it's a race condition between the write and the subsequent read in
} the same process, then it would be solved by looking at the object
} later. Does "git cat-file -p
6838761d549cf76033d2e9faf5954e62839eb25d"
} work, or is the object forever inaccessible?

In your case: git cat-file -p 0b89efdeef245ed6a0a7eacc5c578629a141f856