Engineering Blog

Engineering deep-dives from the SlashFeed team — Elixir, Phoenix, and how the product is built.

all a11y accessibility ai api architecture authentication automations beam blog boruta browserless build-in-public cassandra circuit-breaker claude cron css css-selectors databases debugging discovery dns dnsmasq documentation driver-js ecto elixir fido2 finch floki foreign-keys hammer headless-browser hmac hooks images javascript keyboard liveview llm markdown mcp media meta mfa migrations monitoring multi-tenancy nimble_publisher nimble_totp oauth2 oban oidc onboarding open-graph passkeys performance philosophy phoenix pkce podcasts postgres postgresql privoxy ranking rate-limiting rss scraping security seo svg syntax-highlighting tor totp upsert ux wax wcag webauthn webhooks xandra

Fixing spurious :nxdomain errors in Elixir with dnsmasq and :inet_res

Why a healthy domain can fail with :nxdomain on the BEAM — and the four fixes it took, in order, to stop 125 feeds a day dying of it: lower concurrency, an in-process retry, a local dnsmasq cache, and finally Erlang's own DNS client instead of macOS getaddrinfo.

Oct 15, 2026

elixir beam dns dnsmasq debugging

Subscribe via RSS