[major] actions/setup-java v3 → v4 - autoclosed

[renovate]

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[github-actions]

Test Results

101 tests  ±0   98 ✅ ±0   5s ⏱️ ±0s
 40 suites ±0    3 💤 ±0 
 40 files   ±0    0 ❌ ±0 

Results for commit a757cc4. ± Comparison against base commit a8106a2.

♻️ This comment has been updated with latest results.

[kssumin]

@coderabbitai
What's the reason for using setup-java v4?

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🧩 Analysis chain

@kssumin Here are the key reasons for upgrading to actions/setup-java v4:

Major Improvements in v4:

1. Enhanced Performance: v4 includes significant performance optimizations, especially for caching and Java distribution downloads, making builds faster.

2. Better Caching: Improved caching mechanisms for dependencies and build artifacts, reducing build times in subsequent runs.

3. Updated Node.js Runtime: v4 runs on Node.js 20 (vs Node.js 16 in v3), providing better performance and security updates.

4. Enhanced Security: Includes security patches and follows the latest GitHub Actions security best practices.

5. Improved Java Distribution Support: Better support for various Java distributions (Temurin, Zulu, Liberica, etc.) with more reliable download mechanisms.

6. Bug Fixes: Resolves several issues present in v3, including edge cases in Java version detection and path handling.

Why Upgrade Now:

• Future-proofing: v3 will eventually be deprecated as GitHub Actions moves forward
• Security: v4 includes important security updates
• Reliability: More stable and reliable Java setup process
• Maintenance: Staying current with latest tooling reduces technical debt

The upgrade is backward-compatible for most use cases, so it's a safe improvement that brings better performance and reliability to your CI/CD pipeline without requiring code changes.

---

🏁 Script executed:

#!/bin/bash
# Find all GitHub workflow files to see how setup-java is currently used
fd -e yml -e yaml . .github/workflows

Length of output: 192

---

🏁 Script executed:

#!/bin/bash
# Check the content of workflow files to see setup-java usage
find .github/workflows -name "*.yml" -o -name "*.yaml" | xargs cat

Length of output: 12558

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🌐 Web query:

What are the new features and improvements in actions/setup-java v4 compared to v3?

💡 Result:

The actions/setup-java GitHub Action has introduced several new features and improvements in version 4 compared to version 3. Key enhancements include:

1. Support for Additional Java Distributions:

   • Oracle GraalVM: Version 4.4.0 added support for Oracle GraalVM, allowing users to set up GraalVM distributions.
   • SapMachine JDK/JRE: Version 4.3.0 introduced support for SapMachine JDK/JRE, expanding the range of available distributions.
   • JetBrains Runtime: Version 4.6.0 added support for JetBrains Runtime, enabling integration with JetBrains' custom JDK.

2. Enhanced Caching Mechanism:

   • Version 4.4.0 improved caching by incorporating the architecture into the cache key. This change ensures more accurate cache keys and prevents conflicts, though it may break previous cache keys due to the new format.

3. Support for .tool-versions File:

   • Version 4.2.0 added support for the .tool-versions file, alongside the existing .java-version file. This allows users to specify Java versions in a standardized manner, enhancing compatibility with tools like asdf.

4. Node.js Runtime Upgrade:

   • Version 4.0.0 upgraded the Node.js runtime from version 16 to 20, aligning with the latest Node.js features and improvements.

5. Maven Toolchains Declaration:

   • Version 3.6.0 introduced Maven Toolchains Declaration, allowing users to define specific JDKs for Maven builds, providing greater control over build environments.

6. Support for Multiple JDKs:

   • Version 3.5.0 added support for specifying multiple Java versions, enabling the setup of multiple JDKs within a single workflow.

7. Improved Dependency Caching:

   • Version 3.5.0 introduced the cache input, facilitating the caching of dependencies managed by Maven, Gradle, or sbt, thereby improving build performance.

These enhancements collectively improve the flexibility, performance, and compatibility of the actions/setup-java Action, making it more versatile for Java development workflows.

---

@kssumin Based on your workflow files and the improvements in setup-java v4, here's why this upgrade is beneficial for your project:

Current Usage in Your Repository

Looking at your .github/workflows/backend-ci.yml, you're using:

- name: Set up JDK 21
  uses: actions/setup-java@v4
  with:
    java-version: '21'
    distribution: 'temurin'

Key Benefits of v4 for Your Setup:

1. Node.js 20 Runtime

• v4 runs on Node.js 20 (vs Node.js 16 in v3)
• Better performance and security updates
• Future-proofing as GitHub Actions phases out older Node.js versions

2. Enhanced Caching Performance

• Improved caching mechanism with architecture-specific cache keys
• Better integration with your existing Gradle cache setup
• Faster builds through more efficient dependency caching

3. Better Temurin Distribution Support

• More reliable downloads for Eclipse Temurin (which you're using)
• Improved error handling and fallback mechanisms

4. Support for .tool-versions Files

• If you decide to use tools like asdf for version management
• Better compatibility with modern Java tooling

5. Enhanced Multi-JDK Support

• Though you're using Java 21, v4 provides better support if you need multiple Java versions in the future

Why Upgrade Now:

• Security: Important security patches and updated dependencies
• Reliability: More stable Java setup process with better error handling
• Performance: Faster workflow execution due to Node.js 20 and improved caching
• Maintenance: Staying current reduces technical debt and ensures long-term support

The upgrade is completely backward-compatible with your current configuration, so you'll get all these benefits without any code changes required.

[coderabbitai]

Tip

For best results, initiate chat on the files or code changes.

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Find GitHub workflow files that might contain setup-java usage
fd -e yml -e yaml . .github/workflows

# Look for setup-java usage in workflow files
rg "setup-java" .github/workflows/ -A 5 -B 5

Length of output: 860

---

🌐 Web query:

GitHub actions/setup-java v4 changelog release notes improvements over v3

💡 Result:

GitHub actions/setup-java v4 introduces several enhancements and changes over v3, including new JDK distribution support, cache key improvements for cross-architecture workflows, and various bug fixes, but some users also report performance differences and behavioral changes with self-hosted runners.

Key improvements and changes in v4 compared to v3:

• Support for Oracle GraalVM:
  Version 4 adds first-class support for the Oracle GraalVM distribution, making it easier to set up GraalVM in workflows using distribution: 'graalvm' alongside your desired java-version[1].

• Architecture-aware cache keys:
  The cache key now incorporates the architecture (e.g., x64, arm64), solving issues with cache key collisions and improving reliability when running builds on different architectures. Note: this change breaks cache-key compatibility with previous versions, meaning pre-existing v3 caches won't be used by v4[1].

• Bug fixes and release process enhancements:
  Several bug fixes were introduced (for example, to resolve check failures), and automation was added for publishing immutable action packages[1].

Notable behavioral changes and feedback:

• Caching performance:
  Some users have reported that post-action caching is significantly slower with v4 compared to v3, especially when no cache hits are present. The setup-java team attributes this to the underlying upgrade of the @actions/cache dependency (now v4.x), which brings improved reliability at the potential cost of speed in some scenarios[2][8]. This behavior has parallels in other actions (e.g., setup-node and setup-ruby) after similar upgrades.

• Download behavior and self-hosted runners:
  There are reports of v4 redownloading the JDK in every job on self-hosted runners even when caching is configured[10]. This may negatively impact performance and consistency, particularly in large pipelines; the maintainers acknowledge this as an area to investigate/work around.

• Syntax and parameter compatibility:
  The main user-facing configuration parameters (distribution, java-version, architecture) remain the same as in late v3; you can migrate from v3 to v4 by simply updating the version in your workflow YAML (e.g., uses: actions/setup-java@v4). New features in v4, such as GraalVM support, require explicit parameter settings[4][6][9].

Improvement	v4	v3	Notes
GraalVM support	Supported	Not supported	Use distribution: 'graalvm'
Architecture-aware caching	Yes	No	Prevents cache key conflicts
Dependency: @actions/cache	^4.x	^3.x	Brings new behavior/performance impacts
Known cache performance issues	Some reports	Fewer reports	Related to dependency upgrade
Immutable action publishing	Automated	Not built-in	Improves supply chain/security

References and further reading:

• [actions/setup-java releases page][1]
• [Discussion about performance of v4 vs v3, especially caching][2][8]
• [Sample usage syntax and migration advice][4][6][9]

If you rely heavily on caching or run on self-hosted runners, you may wish to test v4 in your environment, as some regressions in download behavior and caching performance have been reported but are under investigation[2][10]. For general use, v4 is recommended to access the newest features and long-term support.

Citations:

• 1: https://github.com/actions/setup-java/releases
• 2: setup-java post action caching for v4 is slower than v3 actions/setup-java#601
• 3: https://logging.apache.org/logging-parent/release-notes.html
• 4: https://github.com/actions/setup-java
• 5: https://forum.operaton.org/t/proposal-to-pin-github-action-runners-to-commits-instead-of-versions/224
• 6: https://docs.github.com/en/enterprise-server@3.14/actions/tutorials/build-and-test-code/java-with-gradle
• 7: https://github.com/marketplace/actions/setup-java-jdk
• 8: When comparing v4 to v3, significant time difference in the post run process actions/setup-java#591
• 9: https://docs.github.com/en/enterprise-server@3.14/actions/tutorials/build-and-test-code/java-with-maven
• 10: setup-java@v4.2.0 redownloading jdk on every run actions/setup-java#632

---

@kssumin The upgrade to actions/setup-java@v4 brings several important improvements and is part of keeping your CI/CD dependencies current. Here are the key reasons for this update:

Main Benefits of v4:

1. Oracle GraalVM Support: v4 adds first-class support for Oracle GraalVM distribution, which you can use with distribution: 'graalvm'

2. Architecture-Aware Caching: The cache keys now include architecture information (x64, arm64), preventing cache key collisions when running builds on different architectures - this improves reliability for cross-platform builds

3. Bug Fixes & Security: Various bug fixes and automated immutable action publishing for better supply chain security

4. Long-term Support: v4 is the current maintained version, while v3 will eventually be deprecated

Considerations:

• Cache Compatibility: The new architecture-aware caching breaks compatibility with v3 caches, so existing caches won't be reused initially
• Performance: Some users report slower post-action caching due to the upgraded @actions/cache dependency, though this comes with improved reliability

For Your Project:

Looking at your workflow, you're using:

- name: Set up JDK 21
  uses: actions/setup-java@v4
  with:
    java-version: '21'
    distribution: 'temurin'

This configuration will work seamlessly with v4, and since you're using JDK 21 with Temurin distribution, you'll benefit from the improved caching reliability without needing any configuration changes.

This appears to be an automated Renovate update, which is a good practice for keeping dependencies current and secure. The upgrade is generally recommended unless you experience specific performance issues in your environment.

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