无法从 maven 下载依赖项

Question

A month ago, I can build my Java Application successfully on my IntelliJ IDEA from scratch, and now, I have to upgrade my spring-boot to get some new features. But, after I change the version of spring-boot from 2.2.2.RELEASE to other version and click the button of Reload All Maven Projects, I get the message:

org.springframework.boot:spring-boot-starter-parent:pom:2.6.3 failed to transfer from https://repo.maven.apache.org/maven2 during a previous attempt. This failure was cached in the local repository and resolution is not reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:2.6.3 from/to central (https://repo.maven.apache.org/maven2): transfer failed for https://repo.maven.apache.org/maven2/org/springframework/boot/spring-boot-starter-parent/2.6.3/spring-boot-starter-parent-2.6.3.pom

It was fine a month ago for downloading 2.2.2.RELEASE. Why does the update fail at this time? My information is as follows： MacOS 12.2,Bundled (Maven 3), Java of 1.8, IntelliJ IDEA 2021.3 ultimate.

my pom.xml:

<?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>

    <groupId>com.*</groupId>
    <artifactId>web-site</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <modules>
        <module>study-info</module>
        <module>cloud-api</module>
    </modules>
    <packaging>pom</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.3</version>
        <relativePath/>
    </parent>

    <properties>
        <mysql-connector-version>8.0.16</mysql-connector-version>
        <lombok-version>1.18.10</lombok-version>
    </properties>

    <dependencyManagement>
        <dependencies>


<!--            <dependency>-->
<!--                <groupId>org.springframework.boot</groupId>-->
<!--                <artifactId>spring-boot-starter-security</artifactId>-->
<!--            </dependency>-->



            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-aop</artifactId>
            </dependency>



   
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql-connector-version}</version>
            </dependency>


  
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok-version}</version>
            </dependency>




        </dependencies>
    </dependencyManagement>



</project>

Answer 1

It is a network error. I changed another network of my phone's hotspot and it worked.