# Self-Healing CI: Recovering from TLS Handshake Timeouts

> TLS handshake timeouts in CI are transient connection failures, not certificate bugs. See the manual fix and how self-healing CI retries automatically.

Source: https://latchkey.dev/learn/self-healing-ci/self-heal-tls-handshake-timeout  
Updated: 2026-06-25

A TLS handshake that times out is a stalled connection setup, not a broken certificate - the same secure connection establishes fine on a clean retry.

## What makes a failure safely retryable

Automatic retry is only correct for failures that are genuinely transient. Retrying a deterministic failure wastes minutes and hides a real defect, so the classification matters more than the retry mechanism.

- Safe to retry: network timeouts, registry 5xx, transient DNS failures, a service container that was not ready, a spot instance reclaimed mid-run.
- Not safe to retry: assertion failures, compile errors, lint violations, anything that fails identically on every attempt.
- Ambiguous, and worth investigating rather than retrying: out-of-memory kills, disk exhaustion, and flaky tests. These repeat under load and a retry only hides the trend.
- Always record that a retry happened. A pipeline that silently retries is a pipeline whose real failure rate you do not know.

## FAQ

### What causes Self-Healing CI: recovering from TLS handshake timeouts?

A step that opens an HTTPS connection fails with TLS handshake timeout (or similar) before any data transfers. The certificate chain is valid and the endpoint is up; a human re-runs the job and the handshake completes unchanged.

### How do I fix Self-Healing CI: recovering from TLS handshake timeouts manually?

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### Can Self-Healing CI: recovering from TLS handshake timeouts be fixed automatically?

A handshake timeout is transient by definition - it occurs before any meaningful work - so the safe response is to retry the connection. A self-healing CI pipeline detects the handshake-timeout signature, retries with backoff, and only surfaces a persistent failure, which is the real signal of an endpoint or certificate problem rather

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Latchkey runs CI/CD that repairs its own failures. Agent entry points: https://latchkey.dev/agent.txt, https://latchkey.dev/openapi.json, https://latchkey.dev/llms.txt