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An agent found why his calls kept failing in 30 minutes and the fix went out

A man who self hosts an XMPP chat server had audio and video calls that worked only sometimes. He gave an agent access to his phone over ADB and to the server logs, and within 30 minutes the problem was clear: a setting for STUN and TURN discovery had been missed in an earlier move, so clients behind home routers could not connect. The fix was deployed.

How it works

  1. He gives the agent access to his phone over ADB and to the server logs
  2. The agent compares client and server behaviour
  3. Within 30 minutes it finds the missed STUN and TURN discovery setting from an earlier migration
  4. He deploys the fix

Why it’s worth knowing

Given the phone and the logs, the agent pinned a fault that had hidden for weeks to one missed setting in 30 minutes.

Where it’s from

Summarized from a public post on news.ycombinator.com. See the original ↗

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