springboot配置pom报错?报错

报错内容：

Project build error: Non-resolvable parent POM for Mayi:MayiSpringBoot:0.0.1-SNAPSHOT: Failure to transfer org.springframework.boot:spring-boot-starter-parent:pom:1.4.1RELEASE from http://maven.aliyun.com/nexus/content/repositories/central/ was cached in the local repository, resolution will not be reattempted until the update interval of alimaven has elapsed or updates are forced. Original error: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:1.4.1RELEASE from/to alimaven (http://maven.aliyun.com/nexus/content/repositories/central/): Failed to transfer http://maven.aliyun.com/nexus/content/repositories/central/org/springframework/boot/spring-boot-starter-parent/1.4.1RELEASE/spring-boot-starter-parent-1.4.1RELEASE.pom. Error code 502, Bad Gateway and 'parent.relativePath' points at wrong local POM