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possible bug in 4.3.0: stevedore.exception.NoMatches: No extensions found #320

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possible bug in 4.3.0: stevedore.exception.NoMatches: No extensions found#320

Description

@maorfr
maorfr
opened on May 27, 2021

Hello,

importlib-metadata is a dependency for several packages we use and we have encountered a problem with the installation of 4.3.0 together with the jenkins-job-builder package (version 2.10.1 fwiw).

Just to illustrate the issue:

$ docker run -it quay.io/app-sre/qontract-reconcile:013d67a /bin/sh
sh-4.4# jenkins-jobs --version
Traceback (most recent call last):
  File "/usr/local/bin/jenkins-jobs", line 33, in <module>
    sys.exit(load_entry_point('jenkins-job-builder==2.10.1', 'console_scripts', 'jenkins-jobs')())
  File "/usr/local/lib/python3.6/site-packages/jenkins_job_builder-2.10.1-py3.6.egg/jenkins_jobs/cli/entry.py", line 164, in main
    jjb = JenkinsJobs(argv)
  File "/usr/local/lib/python3.6/site-packages/jenkins_job_builder-2.10.1-py3.6.egg/jenkins_jobs/cli/entry.py", line 58, in __init__
    self.parser = create_parser()
  File "/usr/local/lib/python3.6/site-packages/jenkins_job_builder-2.10.1-py3.6.egg/jenkins_jobs/cli/parser.py", line 100, in create_parser
    extension_manager.map(parse_subcommand_args, subparser)
  File "/usr/local/lib/python3.6/site-packages/stevedore-3.3.0-py3.6.egg/stevedore/extension.py", line 291, in map
    raise NoMatches('No %s extensions found' % self.namespace)
stevedore.exception.NoMatches: No jjb.cli.subcommands extensions found

after pinning importlib-metadata to 4.2.0 in app-sre/qontract-reconcile#1589, the issue goes away:

$ docker run -it quay.io/app-sre/qontract-reconcile:4e86cce /bin/sh
sh-4.4# jenkins-jobs --version
Jenkins Job Builder version: 2.10.1

hope this helps!

Activity

  1. jaraco commented on May 28, 2021

    @jaraco
    jaraco
    on May 28, 2021
    Member

    Indeed, it sounds like you've found a regression. #317 was the change introduced for this release. I'll want to inspect what it is about that environment that violates the expectations of the change.

  2. jaraco commented on May 28, 2021

    @jaraco
    jaraco
    on May 28, 2021
    Member

    The problem seems to be that the normalized_name for eggs isn't calculated properly:

    >>> dists = list(md.distributions())
>>> [dist.name for dist in dists]
['setuptools', 'pip', 'reconcile', 'dnspython', 'sendgrid', 'parse', 'tzlocal', 'jenkins-job-builder', 'sentry-sdk', 'prometheus-client', 'UnleashClient', 'tabulate', 'terrascript', 'ruamel.yaml', 'pyOpenSSL', 'jira', 'Jinja2', 'pypd', 'slackclient', 'urllib3', 'botocore', 'boto3', 'python-terraform', 'semver', 'python-gitlab', 'anymarkup', 'ldap3', 'hvac', 'PyGithub', 'jsonpath-rw', 'toml', 'graphqlclient', 'click', 'sretoolbox', 'starkbank-ecdsa', 'python-http-client', 'pytz', 'stevedore', 'python-jenkins', 'pbr', 'fasteners', 'PyYAML', 'certifi', 'requests', 'mmh3', 'fcache', 'APScheduler', 'ruamel.yaml.clib', 'cryptography', 'requests-toolbelt', 'requests-oauthlib', 'oauthlib', 'defusedxml', 'MarkupSafe', 'websocket-client', 'jmespath', 's3transfer', 'xmltodict', 'json5', 'configobj', 'anymarkup-core', 'pyasn1', 'PyNaCl', 'PyJWT', 'Deprecated', 'ply', 'importlib-metadata', 'multi-key-dict', 'idna', 'chardet', 'appdirs', 'cffi', 'wrapt', 'zipp', 'typing-extensions', 'pycparser', 'dbus-python', 'subscription-manager', 'ethtool', 'gpg', 'PyGObject', 'python-dmidecode', 'rpm', 'pyinotify', 'setuptools', 'python-dateutil', 'six', 'syspurpose', 'iniparse', 'decorator', 'pip']
>>> [dist._normalized_name for dist in dists]
['setuptools', 'pip', 'EGG', 'EGG', 'EGG', '', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', '', 'EGG', 'EGG', 'EGG', '', 'EGG', 'EGG', '', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', '', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', '', '', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', '', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'EGG', 'dbus_python', 'subscription_manager', 'ethtool', 'gpg', 'pygobject', 'python_dmidecode', 'rpm', 'pyinotify', 'setuptools', 'python_dateutil', 'six', 'syspurpose', 'iniparse', 'decorator', 'pip']

  3. jaraco commented on May 28, 2021

    @jaraco
    jaraco
    on May 28, 2021
    Member
    >>> dists[0]._path
PosixPath('/usr/local/lib/python3.6/site-packages/setuptools-56.2.0.dist-info')
>>> dists[2]._path
PosixPath('/usr/local/lib/python3.6/site-packages/reconcile-0.2.2-py3.6.egg/EGG-INFO')

    The assumption that the dist name is in the stem of the _path was a mistake.

  4. jaraco
    added a commit that references this issue on May 28, 2021

    Add a test to ensure the normalized name of an egg is reported correc…

    7f2f09a
  5. jaraco
    closed this as completedin ea72278on May 28, 2021

  6. maorfr commented on May 31, 2021

    @maorfr
    maorfr
    on May 31, 2021
    Author

    thanks a lot for the quick action @jaraco! much appreciated.

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