gradle - Spring Maven Repo和Spring Boot 1.4.x的潜在问题

Question

我有一个成功运行几个月的Spring Boot应用程序。我一直在使用带有一些非常基本的依赖项的Spring Boot 1.4.0-BUILD-SNAPSHOT。这是我的build.gradle的样子:

buildscript {
    ext {
        springBootVersion = '1.4.0.BUILD-SNAPSHOT'
    }
    repositories {
        mavenCentral()
        maven { url "https://repo.spring.io/snapshot" }
        maven { url "https://repo.spring.io/milestone" }
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}") 
    }
}

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'spring-boot' 

jar {
    baseName = 'test'
    version = '0.0.1-SNAPSHOT'
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

repositories {
    mavenCentral()
    maven { url "https://repo.spring.io/snapshot" }
    maven { url "https://repo.spring.io/milestone" }
}

dependencies {
    compile('org.springframework.boot:spring-boot-starter-actuator')
    compile('org.springframework.cloud:spring-cloud-starter-eureka')
    compile('org.springframework.cloud:spring-cloud-starter-ribbon')
    compile('org.springframework.boot:spring-boot-starter-web')
    testCompile('org.springframework.boot:spring-boot-starter-test') 
}

dependencyManagement {
    imports { 
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:Brixton.BUILD-SNAPSHOT" 
    }
}

eclipse {
    classpath {
         containers.remove('org.eclipse.jdt.launching.JRE_CONTAINER')
         containers 'org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8'
    }
}

task wrapper(type: Wrapper) {
    gradleVersion = '2.13'
}

直到2016年6月11日(昨天晚上)为止，此方法都没有任何问题。我可以使用以下命令运行gradle构建，并且一切正常:

$ ./gradlew clean build

但是，我的gradle构建一无所获地停止处理错误，如下所示:

$ ./gradlew build
:compileJava

FAILURE: Build failed with an exception.

* What went wrong:
Could not resolve all dependencies for configuration ':compileClasspath'.
> Could not resolve org.springframework.boot:spring-boot-starter-actuator:.
  Required by:
      :test:unspecified
   > Failed to resolve imported Maven boms: Cannot change dependencies of configuration 'detachedConfiguration1' after it has been resolved.
> Could not resolve org.springframework.cloud:spring-cloud-starter-eureka:.
  Required by:
      :test:unspecified
   > Failed to resolve imported Maven boms: Cannot change dependencies of configuration 'detachedConfiguration1' after it has been resolved.
> Could not resolve org.springframework.cloud:spring-cloud-starter-ribbon:.
  Required by:
      :test:unspecified
   > Failed to resolve imported Maven boms: Cannot change dependencies of configuration 'detachedConfiguration1' after it has been resolved.
> Could not resolve org.springframework.boot:spring-boot-starter-web:.
  Required by:
      :test:unspecified
   > Failed to resolve imported Maven boms: Cannot change dependencies of configuration 'detachedConfiguration1' after it has been resolved.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 4.846 secs

我尝试运行./gradlew dependencies来查看依赖错误是什么。这是我发现的:

$ ./gradlew dependencies
... (snipped)
compile - Dependencies for source set 'main'.
Download https://repo.spring.io/snapshot/org/springframework/boot/spring-boot-starter-parent/1.4.0.BUILD-SNAPSHOT/spring-boot-starter-parent-1.4.0.BUILD-20160612.070708-419.pom
Download https://repo.spring.io/snapshot/org/springframework/cloud/spring-cloud-dependencies/Brixton.BUILD-SNAPSHOT/spring-cloud-dependencies-Brixton.BUILD-20160610.161057-28.pom
Download https://repo.spring.io/snapshot/org/springframework/cloud/spring-cloud-dependencies-parent/1.1.2.BUILD-SNAPSHOT/spring-cloud-dependencies-parent-1.1.2.BUILD-20160612.192124-248.pom
Download https://repo.spring.io/snapshot/org/springframework/cloud/spring-cloud-netflix-dependencies/1.1.3.BUILD-SNAPSHOT/spring-cloud-netflix-dependencies-1.1.3.BUILD-20160610.160842-2.pom
+--- org.springframework.boot:spring-boot-starter-actuator: FAILED
+--- org.springframework.cloud:spring-cloud-starter-eureka: FAILED
+--- org.springframework.cloud:spring-cloud-starter-ribbon: FAILED
\--- org.springframework.boot:spring-boot-starter-web: FAILED

compileClasspath - Compile classpath for source set 'main'.
+--- org.springframework.boot:spring-boot-starter-actuator: FAILED
+--- org.springframework.cloud:spring-cloud-starter-eureka: FAILED
+--- org.springframework.cloud:spring-cloud-starter-ribbon: FAILED
\--- org.springframework.boot:spring-boot-starter-web: FAILED

... (same messages repeating for all tasks)

BUILD SUCCESSFUL

Total time: 35.879 secs

经过更多调查后，我发现无法从repo.spring.io/snapshot或repo.spring.io/milestone下载依赖项(我也尝试过使用http的URL；同样的问题)。为了排除其他问题，我还尝试了repo.spring.io/release(带有https和http)-仍然是完全相同的问题。

要解决此问题，我将Spring Boot版本降级到1.3.5.RELEASE(因为它可以从Maven Central存储库中获得，而不必转到Spring的Maven存储库中)。这是更新后的build.gradle:

buildscript {
    ext {
        springBootVersion = '1.3.5.RELEASE'
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}") 
    }
}

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'spring-boot' 

jar {
    baseName = 'test'
    version = '0.0.1-SNAPSHOT'
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    compile('org.springframework.boot:spring-boot-starter-actuator')
    compile('org.springframework.cloud:spring-cloud-starter-eureka')
    compile('org.springframework.cloud:spring-cloud-starter-ribbon')
    compile('org.springframework.boot:spring-boot-starter-web')
    testCompile('org.springframework.boot:spring-boot-starter-test') 
}

dependencyManagement {
    imports { 
        mavenBom "org.springframework.cloud:spring-cloud-starter-parent:Brixton.RELEASE" 
    }
}

eclipse {
    classpath {
         containers.remove('org.eclipse.jdt.launching.JRE_CONTAINER')
         containers 'org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8'
    }
}

task wrapper(type: Wrapper) {
    gradleVersion = '2.13'
}

那行得通。幸运的是，我没有使用任何Spring Boot 1.4.x的特定功能，因此构建过程没有任何问题。我测试了我的应用程序，情况看起来还不错。如您所见，我不再使用Spring的存储库，现在我的所有依赖关系都可以通过mavenCentral()来解决。

所以，我的问题是，如果这是Spring的Maven Repo的问题，怎么会仍然是一个问题(在将近24小时之后)，又怎么会没有人报告这个问题？我花了几个小时在谷歌上搜索，但是似乎没有发现任何实质性的注意或担忧。因此，我不确定我是在做一些非常基本的错误，还是我是某种发现者。

Answer 1

请尝试更改mavenBom依赖项，如下所示。我们面临着同样的问题，这对我们有用。

dependencyManagement {
  imports {
    mavenBom 'org.springframework.cloud:spring-cloud-dependencies:Brixton.RELEASE'
  }
}