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How do you force a refresh or hard refresh of an Application? What does the diff view show and how do you use it? What does OutOfSync mean and what should you do about it? What is the Degraded health status? How does ArgoCD determine the health of a resource? What is the difference between sync status and health status? What are sync options and give common examples? What is a selective sync and when is it useful? How do you configure automated sync with retry and backoff? What causes an Application to be perpetually OutOfSync and how do you fix it?
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What is a dry-run sync?

Beginner

Answer

A dry-run sync asks the API server to validate what would be applied without persisting changes, surfacing errors (schema, admission) before a real sync. It's a safety check to catch problems early, though some issues only appear on actual apply.
argocd app sync app --dry-run
Real-world example A dry-run reveals an invalid field so the manifest is fixed before the real sync runs.

Common follow-ups: What does dry-run catch? | What might it miss?

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