Answer
Early layer changes force rebuild of all subsequent layers.
Quick Answer
Layer cache invalidation cascades: if an early layer changes, all subsequent layers must rebuild. An "invalidation storm" happens when a frequently-changing file (like a package lock) is copied early in the Dockerfile, busting the cache for all subsequent heavy install steps. Fix: copy package manifests first, install, then copy source.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ