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Type:
Bug
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Resolution: Fixed
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Priority:
Minor - P4
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Affects Version/s: 3.6, 3.6.1
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Component/s: Connection Mgmt
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None
Seems that SRV support in pymongo doesn't accept lack of a DNS record for hostname itself.
The _get_dns_txt_options function handles a NoAnswer error but doesn't seem to handle the NXDOMAIN error ( http://www.dnspython.org/docs/1.15.0/dns.resolver.NXDOMAIN-class.html ) so when the specified hostname doesn't have a DNS record it crashes with a configuration error:
>>> import pymongo
>>> cli = pymongo.MongoClient('mongodb+srv://unstable-mongo.privaws.crunch.io/crunch_app_db_prod?ssl=false&replicaSet=crunch-replica-unstable')
<class 'dns.resolver.NXDOMAIN'>
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/var/lib/crunch.io/venv/lib/python2.7/site-packages/pymongo/mongo_client.py", line 468, in __init__
res = uri_parser.parse_uri(entity, port, warn=True)
File "/var/lib/crunch.io/venv/lib/python2.7/site-packages/pymongo/uri_parser.py", line 417, in parse_uri
dns_options = _get_dns_txt_options(fqdn)
File "/var/lib/crunch.io/venv/lib/python2.7/site-packages/pymongo/uri_parser.py", line 302, in _get_dns_txt_options
raise ConfigurationError(str(exc))
pymongo.errors.ConfigurationError: None of DNS query names exist: unstable-mongo.privaws.crunch.io., unstable-mongo.privaws.crunch.io.us-west-2.compute.internal., unstable-mongo.privaws.crunch.io.privaws.crunch.io.
The documentation states that the TXT record is optional and doesn't say anyhwere that a record for the hostname itself is required, so this seems to be an error.
- is depended on by
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PYTHON-1557 Release PyMongo 3.7
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- Closed
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