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Merged
fabisev merged 5 commits into from
Jul 15, 2026
Merged

Pin compilation to JDK8 via Maven Toolchains #617

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1901fac
build: Pin compilation to JDK 8 via Maven Toolchains
darklight3it May 23, 2026
4acf4aa
fix: Add toolchains.xml to codebuild agent for JDK 8 resolution
fabisev Jul 14, 2026
8a3267a
fix: Use heredoc and $JAVA_HOME for toolchains.xml
fabisev Jul 15, 2026
3bdc951
docs: Add toolchains.xml example and setup guide
fabisev Jul 15, 2026
d539586
Merge branch 'main' into dmelfi/pinning-java-8-version-via-toolchain
fabisev Jul 15, 2026
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docs: Add toolchains.xml example and setup guide
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@fabisev
fabisev committed Jul 15, 2026
commit 3bdc9511c1cb6b56ad0d23d85a9f71c8d1d762b5
19 changes: 19 additions & 0 deletions CONTRIBUTING.md
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Expand Up @@ -36,6 +36,25 @@ To send us a pull request, please:
5. Send us a pull request, answering any default questions in the pull request interface.
6. Pay attention to any automated CI failures reported in the pull request, and stay involved in the conversation.


## Build Prerequisites

This project uses the Maven Toolchains Plugin to pin compilation to JDK 8. If you don't have a `~/.m2/toolchains.xml` configured, builds will fail with:

```
No toolchain found for type jdk [ version='[1.8,9)' ]
```

To fix this, copy the example file to your Maven config directory and update the path:

```bash
cp toolchains.xml.example ~/.m2/toolchains.xml
```

Then edit `~/.m2/toolchains.xml` and set `<jdkHome>` to your local JDK 8 installation path.

Note: if you use `actions/setup-java` in CI (as our GitHub Actions workflows do), this file is generated automatically.

GitHub provides additional document on [forking a repository](https://help.github.com/articles/fork-a-repo/) and
[creating a pull request](https://help.github.com/articles/creating-a-pull-request/).

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21 changes: 21 additions & 0 deletions toolchains.xml.example
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<?xml version="1.0" encoding="UTF-8"?>
<!--
Maven Toolchains configuration for aws-lambda-java-libs.

This file tells Maven where to find JDK 8, which is required by the
maven-toolchains-plugin configured in each module's pom.xml.

To use: copy this file to ~/.m2/toolchains.xml and set the jdkHome
path to match your local JDK 8 installation.
-->
<toolchains>
<toolchain>
<type>jdk</type>
<provides>
<version>8</version>
</provides>
<configuration>
<jdkHome>/path/to/your/jdk8</jdkHome>
</configuration>
</toolchain>
</toolchains>
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