Spring Boot 2.7.5 Released: Key Fixes and Maven Mirror Workarounds

Spring Boot 2.7.5 has been released, bringing more than 30 bug fixes and dependency upgrades.

Maven dependency coordinates are available in Maven Central, but cannot be retrieved from the Alibaba Cloud Maven repository.

<parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.7.5</version>
  <relativePath/> <!-- lookup parent from repository -->
</parent>

Specific updates include:

2. Defect Fixes

Multiple configuration blocks now recognize !--- as comments automatically.

Executor configprops endpoint now correctly displays DataSize properties.

Refactored bean injection in @KafkaAutoConfiguration for easier overriding.

PEM‑format certificates in the configuration container are now correctly recognized.

Assertions on CapturedOutput in Kotlin are significantly faster. CouchbaseReactiveHealthIndicator now performs endpoint checks in a non‑blocking manner.

Empty @DefaultValue cannot be used for collections, maps, or arrays.

3. Suspension of Alibaba Cloud Maven Proxy

To improve the mirror site experience, the Alibaba Cloud Maven repository will undergo a system upgrade in October, during which the mirror will be paused.

If you use the Alibaba Cloud Maven proxy, you will encounter missing dependency errors.

4. Using Tencent Cloud Maven Proxy

Configure Tencent Cloud Maven proxy in maven/settings.xml:

<mirror>
    <id>nexus-tencentyun</id>
    <mirrorOf>*</mirrorOf>
    <name>Nexus tencentyun</name>
    <url>http://mirrors.cloud.tencent.com/nexus/repository/maven-public/</url>
</mirror>

Using Tencent Cloud’s multi‑threaded download may trigger a 502 error; simply retry.