Debug-action-cache Fix Access
To debug a GitHub Actions cache issue, the most direct method is to enable Step Debug Logging. This reveals detailed cache keys, hit/miss logs, and download URLs in your workflow run. 🛠️ Essential Debugging Steps
- Improved performance: Reduced time and resources required for debugging.
- Increased productivity: Developers can focus on debugging, rather than waiting for expensive actions to complete.
- Better debugging experience: Quick access to cached results enables developers to explore and understand the behavior of their code more efficiently.
If you are struggling with cache performance, run through this list: debug-action-cache
A common culprit for cache misses is the environment. If your build script pulls in a timestamp, a random seed, or a local file path (e.g., /Users/john/project vs /Users/jane/project), the cache will treat them as different actions. 3. Verbose Logging To debug a GitHub Actions cache issue, the
$ github.run_idensures a unique key every run.- If the build succeeds with this unique key but fails with the standard key, your previous cache was corrupted or stale.
To debug cache issues in GitHub Actions (specifically when using actions/cache), you should focus on verifying cache hits/misses, inspecting key generation, and enabling verbose logging. 1. Enable Verbose Debug Logging Improved performance : Reduced time and resources required
The Action Key is the fingerprint of the work. If you are using a tool that supports a debug-action-cache flag, it will often output the raw components used to generate this key. Check for: Command Line Arguments: Did a compiler flag move?
are too broad, you might be pulling in a cache from a completely different branch. 4. Advanced Troubleshooting Techniques HTTP Header Inspection:
