Bitbucket Pipelines cache missing: only successful builds under 1GB save caches

TL;DR

If it says the cache directory is empty, list the directory at the start and end of the step: dependencies may be landing somewhere else (the default maven cache is ~/.m2/repository). Static directory caching never updates when dependencies change: use file-based cache keys instead. Caches only generate on successful builds, and only caches under 1GB compressed are saved.

Fix

1. If it says the cache directory is empty, list the directory at the start and end of the step: dependencies may be landing somewhere else (the default maven cache is ~/.m2/repository).

Expected: You get the expected result; the problem is gone.

1. Static directory caching never updates when dependencies change: use file-based cache keys instead.

Expected: You get the expected result; the problem is gone.

When to use

• You are setting up or using this Bitbucket Pipelines cache missing feature.
• The symptom matches: only successful builds under 1GB save caches.

When NOT to use

• Unrelated Bitbucket Pipelines cache missing issues (different feature, different failure).
• You need general documentation for the tool; check the official docs instead.

Compatibility

Reported against Bitbucket Pipelines cache missing. Source: https://community.atlassian.com/forums/Pipelines-questions/Pipeline-disregards-use-of-maven-cache/qaq-p/2980191.

Variant phrasings

only successful builds under 1GB save caches

Why it happens

If the cache button shows nothing, the build never saved one.

Edge cases

• If your error message differs even slightly, this is probably a different issue; search the exact text.
• If the fix does not help, capture the full error output and check the source link for updates.

Source

https://community.atlassian.com/forums/Pipelines-questions/Pipeline-disregards-use-of-maven-cache/qaq-p/2980191