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CircleCI Failures

CircleCI CI failures follow similar patterns to other CI systems. This page highlights CircleCI-specific artifacts, workspace usage, and runner details relevant to debugging.

What is a CircleCI failure​

Any job or workflow that exits with non-zero status. CircleCI offers workspaces and cache layers which can be sources of failure when inconsistent.

Why this problem happens​

  • Cache invalidation or workspace mismatches
  • Missing environment variables in container images
  • Resource constraints on build containers

How engineers debug this​

  1. Retrieve job logs and workspace artifacts.
  2. Verify cache keys and workspace contents used by the job.
  3. Reconstruct the failing environment using the same container image.

Best practices​

  • Use stable cache keys and validate cache behavior in CI.
  • Upload artifacts for failing builds to make postmortem analysis easier.

Tools that help​

OctoLaunch links CircleCI runs to deployments and incidents, allowing engineers to traverse from a failing job to potentially implicated releases.

FAQ​

  • Q: How do I inspect workspace contents after a failure?
    • A: Upload workspace artifacts at the end of the job so they are available for later analysis.
  • Q: How can cache issues be detected?
    • A: Check for files that are unexpectedly missing or differ between runs and validate cache keys.

Related reading: