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Travis CI Cache Not Restoring

Travis CI cache not restored when cache directory or key mismatch.

Published: Jan 22, 20269 min readBy FixWikiHub Editorial Team

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Introduction

Travis CI caching speeds up builds by storing dependencies, build artifacts, and other files between builds. When configured correctly, caches persist across builds for the same branch, avoiding repeated dependency downloads and compilations. However, cache restoration can fail when configuration is incorrect, cache keys don't match, or storage limits are exceeded.

Cache configuration in Travis CI uses the .travis.yml file to specify directories to cache and caching strategy. The cache key defaults to the branch name, meaning different branches have separate caches by default. Advanced configurations can use custom cache keys, conditional caching, or multiple cache directories.

When cache restoration fails, builds take longer, consume more resources, and may fail if dependency installation times out. Understanding Travis CI's caching mechanism—including key generation, storage limits, and directory handling—is essential for optimizing build performance.

Symptoms

When Travis CI cache is not restoring, you will observe these symptoms:

Build logs show "cache not found" or "restoring cache" but directory remains empty
Dependencies download from scratch instead of using cached versions
Build times increase significantly compared to previous builds
Cache upload shows as successful but next build doesn't restore
Branch-specific caches don't work after branch rename
Cache appears in Travis UI but isn't restored to build environment

Travis CI log output showing cache miss:

``` cache.2 store build cache

checking for cache... cache does not exist, skipping download

install.1 Installing dependencies... # Full download instead of cache hit ```

Expected cache hit output:

bash

checking for cache...
found cache
downloading archive...
unpacking archive...
cache restored

Travis UI showing cache but build doesn't use it:

``` Caches - branch: main (512 MB, 2 days ago) - branch: develop (128 MB, 1 day ago)

Current build (main branch): "cache not found" ```

Common Causes

Several factors cause Travis CI cache restoration failures:

1.Cache directory path incorrect: The cache.directories paths don't match where dependencies are actually stored. Travis caches only what's explicitly specified.
2.Branch name change: Travis CI keys caches by branch by default. Renaming a branch creates a new, empty cache.
3.Cache key mismatch: Custom cache keys (cache.key) don't match between builds due to environment variable changes or key configuration errors.
4.Cache size limit exceeded: Travis CI has cache size limits (typically 1GB per repository). Oversized caches may be truncated or rejected.
5.Cache disabled in configuration: cache: false or missing cache configuration prevents caching entirely.
6.Different language configuration: Language-specific default caching may not apply if language isn't detected or is incorrectly specified.
7.Cache storage backend issues: Rare issues with Travis CI's cache storage can prevent restoration.
8.Job matrix splits: Different matrix jobs have separate caches by default, which may not share as expected.

Step-by-Step Fix

Follow these steps to diagnose and resolve Travis CI cache restoration issues:

Step 1: Check Travis CI cache configuration

Review the .travis.yml cache settings:

```bash # View current cache configuration cat .travis.yml | grep -A 10 "cache:"

# Common configurations: cache: directories: - node_modules - $HOME/.cache/pip - $HOME/.m2/repository ```

Example configurations:

```yaml # Basic caching cache: npm

# Directory caching cache: directories: - node_modules - vendor/bundle

# With custom key cache: directories: - node_modules key: cache-${TRAVIS_BRANCH}-${TRAVIS_COMMIT}

# Conditional caching cache: directories: - node_modules edge: true # Use edge caching ```

Step 2: Verify cache exists in Travis

Check cache status in Travis CI:

```bash # Via Travis CLI travis cache

# Output: main: 512 MB (2 days ago) develop: 128 MB (1 day ago) feature-branch: 64 MB (1 hour ago)

# Check specific branch cache travis cache --branch main

# Or via Travis API curl -H "Authorization: token $TRAVIS_TOKEN" \ https://api.travis-ci.com/repo/owner%2Frepo/caches ```

Step 3: Check cache directory paths

Verify cached directories match actual locations:

```yaml # For Node.js cache: directories: - node_modules # Default location # NOT: ./node_modules (relative path issues)

# For Python/pip cache: directories: - $HOME/.cache/pip # pip cache location - $HOME/.local/lib/python*/site-packages

# For Ruby/bundler cache: directories: - vendor/bundle # When using --path vendor/bundle

# For Java/Maven cache: directories: - $HOME/.m2/repository

# For Java/Gradle cache: directories: - $HOME/.gradle/caches - $HOME/.gradle/wrapper ```

Step 4: Debug cache paths in build

Add debug output to verify paths:

yaml

script:
  - echo "Checking cache directories..."
  - ls -la node_modules/ || echo "node_modules not found"
  - ls -la $HOME/.cache/pip/ || echo "pip cache not found"
  - echo "HOME is $HOME"
  - echo "PWD is $PWD"

Step 5: Fix cache key configuration

Use correct cache keys:

```yaml # Branch-based key (default behavior) cache: directories: - node_modules # Key defaults to branch name

# Commit-based key (invalidates on each commit) cache: directories: - node_modules key: $TRAVIS_COMMIT

# Dependency file hash (recommended) cache: directories: - node_modules key: - package-lock.json # Or explicit hash - v1-dependencies-$( checksum package-lock.json )

# Multiple keys for fallback cache: directories: - node_modules key: - v2-deps-$( checksum package-lock.json ) - v1-deps-$( checksum package-lock.json ) - v1-deps- ```

Step 6: Clear corrupted cache

Reset cache if corrupted:

```bash # Via Travis CLI travis cache --delete

# Delete specific branch cache travis cache --delete --branch main

# Via API curl -X DELETE \ -H "Authorization: token $TRAVIS_TOKEN" \ https://api.travis-ci.com/repo/owner%2Frepo/caches

# After deletion, next build creates fresh cache ```

Step 7: Configure language-specific caching

Use language-appropriate caching:

```yaml # Node.js - automatic npm caching language: node_js node_js: - 18 cache: npm: true # or just 'cache: npm'

# Python - pip caching language: python python: - 3.11 cache: pip: true directories: - $HOME/.cache/pip

# Ruby - bundler caching language: ruby rvm: - 3.2 cache: bundler: true

# Go - module caching language: go go: - 1.21 cache: directories: - $GOPATH/pkg/mod - $HOME/go/pkg/mod

# PHP - composer caching language: php php: - 8.2 cache: directories: - $HOME/.composer/cache ```

Step 8: Handle matrix builds correctly

Configure caching for matrix builds:

```yaml # Matrix builds have separate caches by default matrix: include: - node_js: 16 - node_js: 18

# All matrix jobs share cache from same branch # To share across matrix, use explicit key: cache: directories: - node_modules key: shared-deps-${ checksum package-lock.json } ```

Step 9: Verify cache restoration

Add verification step:

```yaml install: - npm install

script: - echo "Verifying cache restoration..." - | if [ -d "node_modules" ]; then echo "node_modules exists - cache restored" ls node_modules | wc -l else echo "node_modules missing - cache not restored" fi - npm test ```

Verification

After fixing cache configuration, verify restoration works:

```yaml # Add cache verification to .travis.yml script: - | echo "Cache verification:" echo "node_modules files: $(ls node_modules 2>/dev/null | wc -l)" echo "Expected: > 100 packages" - npm test

after_cache: - echo "Cache saved with: $(du -sh node_modules | cut -f1)" ```

Trigger a build and check logs:

```bash # Trigger build travis trigger

# Watch build logs travis logs

# Check for cache hit in logs: # "found cache" # "unpacking archive" # "cache restored" ```

Compare build times:

bash

Before cache fix: 5 minutes (full dependency install)
After cache fix: 1.5 minutes (cache restored)

Prevention

To prevent Travis CI cache issues:

1.Use dependency file checksums in cache keys: Invalidate cache only when dependencies change.

yaml

cache:
  directories:
    - node_modules
  key:
    - v1-deps-$( checksum package-lock.json )

1.Document cache configuration: Keep records of cached paths.

```markdown ## Travis CI Cache - node_modules: npm dependencies - $HOME/.cache/pip: pip packages - vendor/bundle: bundler gems

Cache key: package-lock.json checksum Expected size: ~500MB ```

1.Monitor cache size: Keep caches under limits.

yaml

after_cache:
  - echo "Cache size: $(du -sh node_modules)"
  - |
    SIZE=$(du -sm node_modules | cut -f1)
    if [ $SIZE -gt 800 ]; then
      echo "Warning: Cache size approaching limit"
    fi

1.Use explicit paths: Avoid relative path confusion.

yaml

cache:
  directories:
    - $TRAVIS_BUILD_DIR/node_modules

1.Test cache after configuration changes: Verify cache works after any .travis.yml modifications.
2.Use before_cache for cleanup: Remove unnecessary files before caching.

yaml

before_cache:
  - rm -rf node_modules/.cache  # Remove temp files
  - rm -rf $HOME/.cache/pip/log  # Remove logs

1.Consider cache timeout: Travis may skip slow cache operations.

yaml

cache:
  timeout: 1000  # Increase timeout to 1000 seconds

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Last updated: Jan 22, 2026

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Travis CI Cache Not Restoring

Introduction

Symptoms

Common Causes

Step-by-Step Fix

Step 1: Check Travis CI cache configuration

Step 2: Verify cache exists in Travis

Step 3: Check cache directory paths

Step 4: Debug cache paths in build

Step 5: Fix cache key configuration

Step 6: Clear corrupted cache

Step 7: Configure language-specific caching

Step 8: Handle matrix builds correctly

Step 9: Verify cache restoration

Verification

Prevention

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Travis CI Cache Not Restoring

Introduction

Symptoms

Common Causes

Step-by-Step Fix

Step 1: Check Travis CI cache configuration

Step 2: Verify cache exists in Travis

Step 3: Check cache directory paths

Step 4: Debug cache paths in build

Step 5: Fix cache key configuration

Step 6: Clear corrupted cache

Step 7: Configure language-specific caching

Step 8: Handle matrix builds correctly

Step 9: Verify cache restoration

Verification

Prevention

Related Articles

People also search for

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