How to Resolve \'cannot unmarshal DNS message\' Error When Connecting to MongoDB Atlas from Golang on Ubuntu?

Connecting to Mongo Cloud Database in Golang on Ubuntu

When attempting to connect to a Mongo Cloud database in Golang on Ubuntu, users may encounter the error "cannot unmarshal DNS message." This issue stems from a change in Go version 1.11.x that more strictly adheres to RFC-2782 in its handling of SRV records, raising an error when an authoritative DNS server sends compressed records.

The solution involves a workaround for Go v1.11:

1. Use a non-SRV MongoDB URI: Replace the URI with one that does not use SRV.
2. Modify /etc/resolv.conf: Set the nameserver to a compliant public DNS server, such as 1.1.1.1 or 8.8.8.8, to avoid compressed SRV records.

As referenced in GODRIVER-829, this issue is not directly related to the MongoDB Go driver but rather to the stricter handling of DNS records in Go. Implementing the suggested workarounds will allow users to establish a successful connection to the database on Ubuntu.

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