Back to feed
Dev.to
Dev.to
7/19/2026
The bug that only showed up because my test was too fast

The bug that only showed up because my test was too fast

Short summary

A debugging story where a Testcontainers wait strategy based on Keycloak's log output caused intermittent connection-reset failures because the log line appears before the HTTP listener is ready. The fix: switch from Wait.forLogMessage to Wait.forHttp polling the actual endpoint. The broader lesson is to wait on the side effect you depend on, not a stated intention.

  • Log-message wait strategies can pass before the service accepts connections
  • Fix: use Wait.forHttp with status code polling instead of log matching
  • General principle: wait on actual side effects, not stated intentions

Generated with AI, which can make mistakes.

Is this a good recommendation for you?

Comments

Failed to load comments. Please try again.

Explore more