Race conditions when running multiple mamba instances at the same time

[jonashaag]

When I run multiple Mamba/Micromamba create at this same time I'm getting funny errors, see below.

[jonashaag]

I'm getting a bunch of other errors, maybe this is due to broken locking (running a test suite with concurrency)

mapping pread: No such file or directory
mapping pread: No such file or directory
mapping pread: No such file or directory
mapping pread: No such file or directory
mapping pread: No such file or directory
mapping pread: No such file or directory
warning  libmamba Could not validate package '/Users/runner/micromamba/pkgs/libcxx-15.0.7-h71dddab_0/info/repodata_record.json': md5 and sha256 sum unknown.
    Set safety_checks to disabled to override this warning.
warning  libmamba Extracted package cache '/Users/runner/micromamba/pkgs/libcxx-15.0.7-h71dddab_0' has no checksum
warning  libmamba Could not validate package '/Users/runner/micromamba/pkgs/libcxx-15.0.7-h71dddab_0.conda': md5 and sha256 sum unknown.
    Set safety_checks to disabled to override this warning.
warning  libmamba Could not validate package '/Users/runner/micromamba/pkgs/xtl-0.7.5-hb8565cd_0/info/repodata_record.json': md5 and sha256 sum unknown.
    Set safety_checks to disabled to override this warning.
warning  libmamba Extracted package cache '/Users/runner/micromamba/pkgs/xtl-0.7.5-hb8565cd_0' has no checksum
warning  libmamba Could not validate package '/Users/runner/micromamba/pkgs/xtl-0.7.5-hb8565cd_0.conda': md5 and sha256 sum unknown.
    Set safety_checks to disabled to override this warning.
warning  libmamba Could not validate package '/Users/runner/micromamba/pkgs/xtensor-0.23.10-h940c156_0/info/repodata_record.json': md5 and sha256 sum unknown.
    Set safety_checks to disabled to override this warning.
warning  libmamba Extracted package cache '/Users/runner/micromamba/pkgs/xtensor-0.23.10-h940c156_0' has no checksum
warning  libmamba Could not validate package '/Users/runner/micromamba/pkgs/xtensor-0.23.10-h940c156_0.tar.bz2': md5 and sha256 sum unknown.
    Set safety_checks to disabled to override this warning.
warning  libmamba Could not validate package '/Users/runner/micromamba/pkgs/libcxx-15.0.7-h71dddab_0/info/repodata_record.json': md5 and sha256 sum unknown.
    Set safety_checks to disabled to override this warning.
warning  libmamba Extracted package cache '/Users/runner/micromamba/pkgs/libcxx-15.0.7-h71dddab_0' has no checksum
error    libmamba Cannot find a valid extracted directory cache for 'libcxx-15.0.7-h71dddab_0.conda'
critical libmamba Package cache error.

[JohanMabille]

I guess it works with micromamba 1.4.7?

[jonashaag]

OK no it also fails with 1.4.7

[jonashaag]

I tested all versions down to 1.3.1. We always have this problem.

I expected multiple Mamba instances not to get in each other's way due to locking. Is that not the case?

[ZhangxiJesseFeng]

I am also experiencing this issue. Identical warning leading to build failure. However in my case, it failed the docker build GitHub action but other actions that also use mamba passed.