尽管安装了证书，但由于 sun.security.validator.ValidatorException 导致 Gradle 构建失败

Question

我正在尝试按照他们的指示运行lenskit-hello。当我运行 ./gradlew build 时，我收到错误

(base) Briennas-MBP:lenskit-hello-master briennakh$ ./gradlew build
:compileJava

FAILURE: Build failed with an exception.

* What went wrong:
Could not resolve all dependencies for configuration ':compileClasspath'.
> Could not resolve org.lenskit:lenskit-all:3.0-M3.
  Required by:
      :lenskit-hello-master 4.50.57 AM:unspecified
   > Could not resolve org.lenskit:lenskit-all:3.0-M3.
      > Could not get resource 'https://repo1.maven.org/maven2/org/lenskit/lenskit-all/3.0-M3/lenskit-all-3.0-M3.pom'.
         > Could not GET 'https://repo1.maven.org/maven2/org/lenskit/lenskit-all/3.0-M3/lenskit-all-3.0-M3.pom'.
            > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
   > Could not resolve org.lenskit:lenskit-all:3.0-M3.
      > Could not get resource 'https://jcenter.bintray.com/org/lenskit/lenskit-all/3.0-M3/lenskit-all-3.0-M3.pom'.
         > Could not GET 'https://jcenter.bintray.com/org/lenskit/lenskit-all/3.0-M3/lenskit-all-3.0-M3.pom'.
            > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

* 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: 4.009 secs

我在 MacOS Mojave 10.14.6 上使用 Java 1.8.0_241（并且只安装了那个）。我已经安装了最新的安全更新，然后重新启动了我的计算机。我已经在我的常规 wifi 和手机热点上尝试过这个。

我按照接受的答案here 中的说明，从https://repo1.maven.org/maven2/org/lenskit/lenskit-all/3.0-M2/lenskit-all-3.0-M2.pom 和https://oss.sonatype.org/content/repositories/snapshots/org/lenskit/lenskit-all/3.0-M2/lenskit-all-3.0-M2.pom 下载安全证书，并通过以下命令将它们添加到密钥库（仅显示其中之一）：

keytool -import -alias maven -file /Users/briennakh/Downloads/maven.cer -keystore 
/Library/Java/JavaVirtualMachines/jdk1.8.0_241.jdk/Contents/Home/jre/lib/security/cacerts

如果我检查一下

keytool -list -keystore /Library/Java/JavaVirtualMachines/jdk1.8.0_241.jdk/Contents/Home/jre/lib/security/cacerts | grep maven

它显示我的证书已添加，maven, Mar 17, 2020, trustedCertEntry，但在运行./gradlew build 时我仍然遇到同样的错误？

我还检查了openssl x509 -in /Users/briennakh/Downloads/maven.pem -text 以确保证书看起来没问题。

Answer 1

SSL certificate 开始时不是自签名的，因此不需要手动添加。尝试重新安装 Java 或将备用安装位置设置为 $JAVA_HOME，并使用默认的 cacerts 文件。有些东西似乎坏了，因为它不应该拒绝repo1.maven.org 的证书。 ls -la $JAVA_HOME/jre/lib/security/cacerts 说 cacerts 应该有大约 114757 字节。如果您位于防火墙后面，则可能需要 configure a proxy 获取 Gradle。

这应该尝试 SSL 会话（不通过 Java）：

$ openssl s_client -connect repo1.maven.org:443

---

本项目还使用了一个相当outdated version的Gradle，例如：

distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip