How to get renovate to update the java version in my pom.xml

Question

I want renovate to keep my Java versions in my pom.xml updated. I had a look on the information in the renovate docs and it seems like it should work out of the box:
https://docs.renovatebot.com/java/#lts-releases
https://docs.renovatebot.com/presets-workarounds/#workaroundsjavaltsversions

My renovate config looks like this:

 {
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "packageRules": [
    {
      "matchPackageNames": [
        "maven-wrapper"
      ],
      "enabled": false
    }
  ],
  "configMigration": true,
  "extends": [
    "config:recommended",
    "group:allNonMajor",
    ":approveMajorUpdates"
  ]
}

And my pom looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>demo</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.3</version>
        <relativePath/>
    </parent>
    <groupId>demo</groupId>
    <artifactId>demo-service</artifactId>
    <version>0.70.2-SNAPSHOT</version>
    <name>demo-service</name>
    <description>Demo project</description>
    <properties>
        <java.version>17</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>com.google.cloud.tools</groupId>
                <artifactId>jib-maven-plugin</artifactId>
                <version>${jib-maven-plugin.version}</version>
                <configuration>
                    <from>
                        <image>eclipse-temurin:${java.version}-alpine</image>  <----
                    </from>
                    ....
            </plugin>
        </plugins>
    </build>
</project>

I'm overwriting the Java version that the Spring Boot Starter Parent uses with <java.version>17</java.version>, I also use this to determine the version of the eclipse Temurin base image in JIB.

Renovate won't pick up this dependency/version. What am I doing wrong? There also are no related logs in the debug output.

Update: Thanks to @Gaël J I created a feature request in the renovate project.

Answer 1

As of 2024-02, this is not yet supported but you can submit a feature request or even a pull request in Renovate's GitHub

---

The java datasource available in Renovate is only supported by the asdf manager.

The maven manager does not use the java datasource to detect and suggest updates of java.version Maven property.