Bug 1792919

Summary:	python-dns fails to build with Python 3.9: imports abc from collections
Product:	[Fedora] Fedora	Reporter:	Miro Hrončok <mhroncok>
Component:	python-dns	Assignee:	Paul Wouters <pwouters>
Status:	CLOSED RAWHIDE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	aviso, cstratak, louiz, mhroncok, pspacek, pwouters, tir.karthi
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Last Closed:	2020-01-22 15:23:03 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Bug Blocks:	1785415

Description Miro Hrončok 2020-01-20 11:50:47 UTC

python-dns fails to build with Python 3.9.0a2.

AttributeError: module 'collections' has no attribute 'MutableMapping'

See https://docs.python.org/3.9/whatsnew/3.9.html#removed

"The abstract base classes in collections.abc no longer are exposed in the regular collections module. This will help create a clearer distinction between the concrete classes and the abstract base classes."

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.9/fedora-rawhide-x86_64/01161146-python-dns/

For all our attempts to build python-dns with Python 3.9, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/package/python-dns/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.9:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/

Let us know here if you have any questions.

Python 3.9 will be included in Fedora 33. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.9.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.

Comment 1 Miro Hrončok 2020-01-22 10:13:47 UTC

The following packages require this in rawhide:

calibre-0:4.8.0-3.fc32.x86_64
cobbler-0:3.1.1-1.fc32.noarch
dnsperf-0:2.3.2-2.fc32.x86_64
electron-cash-0:4.0.12-1.fc32.noarch
electrum-0:3.3.4-5.fc32.noarch
fleet-commander-admin-0:0.15.0-1.fc32.noarch
fleet-commander-admin-0:0.15.0-1.fc32.src
freeipa-0:4.8.4-2.fc32.src
linkchecker-0:9.4.0-7.20190422.72b85c4.fc32.src
linkchecker-0:9.4.0-7.20190422.72b85c4.fc32.x86_64
mailman3-0:3.2.0-2.fc30.noarch
mailman3-0:3.2.0-2.fc30.src
mirrormanager2-0:0.11-1.fc32.noarch
mirrormanager2-0:0.11-1.fc32.src
mirrormanager2-lib-0:0.11-1.fc32.noarch
mysql-connector-python3-0:8.0.19-1.fc32.noarch
nordugrid-arc-archery-manage-0:6.4.1-1.fc32.noarch
python-certbot-dns-rfc2136-0:1.0.0-1.fc32.src
python-dns-lexicon-0:3.3.4-2.fc32.src
python-etcd-0:0.4.5-17.fc32.src
python-eventlet-0:0.25.1-2.fc32.src
python-kdcproxy-0:0.4.2-2.fc32.src
python-ryu-0:4.29-7.fc32.src
python3-certbot-dns-rfc2136-0:1.0.0-1.fc32.noarch
python3-dns-lexicon+hetzner-0:3.3.4-2.fc32.noarch
python3-email-validator-0:1.0.5-2.fc32.noarch
python3-etcd-0:0.4.5-17.fc32.noarch
python3-eventlet-0:0.25.1-2.fc32.noarch
python3-ipaclient-0:4.8.4-2.fc32.noarch
python3-ipalib-0:4.8.4-2.fc32.noarch
python3-ipaserver-0:4.8.4-2.fc32.noarch
python3-kdcproxy-0:0.4.2-2.fc32.noarch
python3-samba-2:4.11.5-0.fc32.x86_64

Comment 2 Karthikeyan Singaravelan 2020-01-22 14:48:11 UTC

Seems to be fixed with https://github.com/rthalley/dnspython/commit/62d3d41382d919af4662c12876f3de6ca854fd54 . Thanks

Comment 3 Miro Hrončok 2020-01-22 15:00:03 UTC

Preparing a Fedora PR.

Comment 4 Miro Hrončok 2020-01-22 15:03:15 UTC

https://src.fedoraproject.org/rpms/python-dns/pull-request/2

Comment 5 Miro Hrončok 2020-01-22 15:23:03 UTC

https://src.fedoraproject.org/rpms/python-dns/c/31a76545eaa317b712ab00e701f7d5840669c79d?branch=master