pull: misleading/unexpected warning

[shcheklein]

Bug Report

Description

dvc pull complained about missing cache files (locally and remotely), but then downloads it successfully.

(.env) √ Projects/get-started-experiments % dvc pull
WARNING: Some of the cache files do not exist neither locally nor on remote. Missing cache files:
name: 8a31b1338b609cf1133d1df639de606c.dir, md5: 8a31b1338b609cf1133d1df639de606c.dir
A       data/fashion-mnist/prepared/
A       data/fashion-mnist/preprocessed/
A       models/fashion-mnist/model.h5
A       data/fashion-mnist/raw/
4 files added and 9 files fetched

(.env) √ Projects/get-started-experiments % dvc pull
Everything is up to date.

(.env) √ Projects/get-started-experiments % ls .dvc/cache/8a/31b1338b609cf1133d1df639de606c.dir
.dvc/cache/8a/31b1338b609cf1133d1df639de606c.dir

Reproduce

For me the sequence of commands was:

git clone git@github.com:iterative/get-started-experiments.git
cd get-started-experiments
virtualenv -p python3 .env
pip install -e "../dvc[all]"
dvc list . data/fashion-mnist/prepared
dvc pull

Expected

No warning.

Environment information

(.env) √ Projects/get-started-experiments % dvc version
DVC version: 2.3.0+eb46c0
---------------------------------
Platform: Python 3.8.9 on macOS-10.15.6-x86_64-i386-64bit
Supports: All remotes
Cache types: reflink, hardlink, symlink
Cache directory: apfs on /dev/disk1s1
Caches: local
Remotes: https
Workspace directory: apfs on /dev/disk1s1
Repo: dvc, git

[shcheklein]

I'm getting the same with other commands (e.g. dvc list . -R). I think the reason for this is that 8a31b1338b609cf1133d1df639de606c.dir corresponds to the import stage:

md5: f8caa1a6a0770ea1ba3acaec0b8a5466
frozen: true
deps:
- path: fashion-mnist/raw
  repo:
    url: https://github.com/iterative/dataset-registry
    rev_lock: ba014f40e29670421a67cb1c47543f402348aa13
outs:
- md5: 8a31b1338b609cf1133d1df639de606c.dir
  size: 30878645
  nfiles: 4
  path: raw

And pull seems to work fine, but somewhere we are trying to collect it in the same way as a regular output?

It leads to these sporadic warnings here and there.

[pared]

I am able to reproduce:

def test_imported_status(tmp_dir, scm, dvc, erepo_dir, make_tmp_dir, caplog):
    with erepo_dir.chdir():
        erepo_dir.dvc_gen({"dir": {"file": "file content"}}, commit="init data")

    dvc.imp(str(erepo_dir), "dir", out="import_dir")
    tmp_dir.add_remote(url = str(make_tmp_dir("storage")), name="str", default=True)

    import shutil
    shutil.rmtree(tmp_dir/".dvc"/"cache")
    shutil.rmtree(tmp_dir/"import_dir")
    import logging
    caplog.clear()

    with caplog.at_level(logging.WARNING, "dvc"):
        dvc.ls(str(tmp_dir), recursive=True)

    assert "Missing cache files" not in caplog.text

This is interesting one. Seems like solving #4527 should help with it. But, since the imported data can be update-ed, doesn't it mean that status should work differently? Eg warning for import should show only if we don't have access to source repo?

[efiop]

@shcheklein Thanks for the report! 🙏 From a quick look, the bug is only present in the upstream, and is not present in stable versions (2.3.0 being the latest one). I will be fixed in the next release. Related to #6008

[pmrowla]

This will likely end up being resolved by the import changes in #6109

[efiop]

Fixed by #6109 . Thanks @pmrowla 🙏