Project 'org.springframework.boot:spring-boot-starter-parent:2.4.0' not found

Question

I am following this guide: https://spring.io/guides/gs/serving-web-content/,

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.0</version>
        <relativePath/>
    </parent>

    <groupId>org.example</groupId>
    <artifactId>plats-bruts</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.junit.vintage</groupId>
                <artifactId>junit-vintage-engine</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

</project>

but I have this problem on the pom:

Project 'org.springframework.boot:spring-boot-starter-parent:2.4.0' not found

but Its here https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-parent/2.4.0

Answer 1

I just ran into a similar problem. I'm using IntelliJ IDEA Ultimate 2020.2. The version number 2.4.0 was red and the message was the same as yours.

Selecting File -> Invalidate Caches / Restart... and choosing the Invalidate and Restart option fixed the issue. I guess it was just a stale cache.

Answer 2

What worked for me was re-building and remote caches and then local caches. Here're the steps I followed (on Mac, please translate to your target environment):

1. Goto Preferences Menu: ie: IntelliJ IDEA > Preferences
2. Under Build Tools: ie: "Build, Execution, Deployment" > Build Tools
3. Select Repositories: ie: Maven > Repositories
4. Notice the Remote and Local repositories, and the Update button
5. Select Each repository and click Update. This will take a while depending on your internet speed, but it will do a complete check of the broken downloads and stale Maven caches

Answer 3

Spring Boot's starter parent pom certainly does exist in Maven Central.

I copied your pom.xml and ran mvn test using Maven 3.6.3. All required libraries, including the parent pom were downloaded just fine. You will probably want to look at your ~/.m2/settings.xml file to see if any proxies are active that are preventing you from connecting to Maven Central.