Java 单个项目中的多个Spring云GCP库导致NoClassDefFoundError

如果我使用单个Spring云GCP库，例如

实现（“org.springframework.Cloud:Spring-Cloud-GCP-starter-sql-postgresql:1.1.1.RELEASE”）

和属性：

Spring.Cloud.GCP.credentials.encoded key=

。。。一切正常

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.jdbc.DataSourceProperties]: Factory method 'cloudSqlDataSourceProperties' threw exception; nested exception is java.lang.NoClassDefFoundError: com/google/cloud/sql/core/CoreSocketFactory
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
    ... 171 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/google/cloud/sql/core/CoreSocketFactory
    at org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$CloudSqlDataSourcePropertiesConfiguration.cloudSqlDataSourceProperties(GcpCloudSqlAutoConfiguration.java:209) ~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
    at org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$CloudSqlDataSourcePropertiesConfiguration$$EnhancerBySpringCGLIB$$4f5495da.CGLIB$cloudSqlDataSourceProperties$0(<generated>) ~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
    at org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$CloudSqlDataSourcePropertiesConfiguration$$EnhancerBySpringCGLIB$$4f5495da$$FastClassBySpringCGLIB$$58c2377.invoke(<generated>) ~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.1.4.RELEASE.jar:5.1.4.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.1.4.RELEASE.jar:5.1.4.RELEASE]
    at org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$CloudSqlDataSourcePropertiesConfiguration$$EnhancerBySpringCGLIB$$4f5495da.cloudSqlDataSourceProperties(<generated>) ~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:567) ~[na:na]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
    ... 172 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.google.cloud.sql.core.CoreSocketFactory
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583) ~[na:na]
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na]
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na]
    ... 183 common frames omitted

但是如果我还想通过：

实现（“org.springframework.cloud:springcloudgcpstarterpubsub:1.1.3.RELEASE”）

向我的项目添加pub/sub，那么我会得到下面的例外

我试过：

使用不同的Java版本11和12

不同的Spring Cloud GCP库作为“第二个”库

实现（“org.springframework.Cloud:Spring Cloud GCP starter:1.1.3.RELEASE”）

和

实现（“org.springframework.Cloud:Spring Cloud GCP starter logging:1.1.3.RELEASE”）

使用

spring.cloud.gcp.credentials.location

而不是

spring.cloud.gcp.credentials.encoded key

使用管理服务帐户以确保它不是IAM角色问题

实现（“org.springframework.cloud:spring-cloud-gcp-starter:1.1.3.RELEASE”）

和

实现（“org.springframework.cloud:spring-cloud-gcp-starter-logging:1.1.3.RELEASE”）

当我包含多个Spring Cloud GCP库时，同样的

SocketFactory

错误就会出现。从文档来看，它应该可以正常工作。第二个库应该只使用相同的凭据

如果我恢复到单个库，那么它可以正常工作

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.jdbc.DataSourceProperties]: Factory method 'cloudSqlDataSourceProperties' threw exception; nested exception is java.lang.NoClassDefFoundError: com/google/cloud/sql/core/CoreSocketFactory
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
    ... 171 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/google/cloud/sql/core/CoreSocketFactory
    at org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$CloudSqlDataSourcePropertiesConfiguration.cloudSqlDataSourceProperties(GcpCloudSqlAutoConfiguration.java:209) ~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
    at org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$CloudSqlDataSourcePropertiesConfiguration$$EnhancerBySpringCGLIB$$4f5495da.CGLIB$cloudSqlDataSourceProperties$0(<generated>) ~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
    at org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$CloudSqlDataSourcePropertiesConfiguration$$EnhancerBySpringCGLIB$$4f5495da$$FastClassBySpringCGLIB$$58c2377.invoke(<generated>) ~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.1.4.RELEASE.jar:5.1.4.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.1.4.RELEASE.jar:5.1.4.RELEASE]
    at org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$CloudSqlDataSourcePropertiesConfiguration$$EnhancerBySpringCGLIB$$4f5495da.cloudSqlDataSourceProperties(<generated>) ~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:567) ~[na:na]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
    ... 172 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.google.cloud.sql.core.CoreSocketFactory
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583) ~[na:na]
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na]
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na]
    ... 183 common frames omitted

原因：org.springframework.beans.beans实例化异常：未能实例化[org.springframework.boot.autoconfigure.jdbc.DataSourceProperties]：工厂方法“cloudSqlDataSourceProperties”引发异常；嵌套的异常是java.lang.NoClassDefFoundError:com/google/cloud/sql/core/CoreSocketFactory
在org.springframework.beans.factory.support.SimpleInstallationStrategy.instantiate（SimpleInstallationStrategy.java:185）~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
在org.springframework.beans.factory.support.ConstructorResolver.instantiate（ConstructorResolver.java:622）~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
... 171省略了公共帧
原因：java.lang.NoClassDefFoundError:com/google/cloud/sql/core/CoreSocketFactory
在org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$cloudSqlDataSourceProperties配置.cloudSqlDataSourceProperties（GcpCloudSqlAutoConfiguration.java:209）~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
在org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$cloudSqlDataSourceProperties配置$$EnhancerBySpringCGLIB$$4f5495da.CGLIB$cloudSqlDataSourceProperties$0（）~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
在org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$cloudsqldatasourceproperties配置$$EnhancerBySpringCGLIB$$4f5495da$$fastclassbypringcglib$$58c2377.invoke（）~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
在org.springframework.cglib.proxy.MethodProxy.invokeSuper（MethodProxy.java:244）~[spring-core-5.1.4.RELEASE.jar:5.1.4.RELEASE]
在org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept（ConfigurationClassEnhancer.java:363）~[spring-context-5.1.4.RELEASE.jar:5.1.4.RELEASE]
在org.springframework.cloud.gcp.autoconfigure.sql.GcpCloudSqlAutoConfiguration$cloudSqlDataSourceProperties配置$$EnhancerBySpringCGLIB$$4f5495da.cloudSqlDataSourceProperties（）~[spring-cloud-gcp-autoconfigure-1.1.3.RELEASE.jar:1.1.3.RELEASE]
在java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0（本机方法）~[na:na]
在java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）~[na:na]
在java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）~[na:na]
在java.base/java.lang.reflect.Method.invoke（Method.java:567）~[na:na]
在org.springframework.beans.factory.support.SimpleInstallationStrategy.instantiate（SimpleInstallationStrategy.java:154）~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
... 省略172个公共帧
原因：java.lang.ClassNotFoundException:com.google.cloud.sql.core.CoreSocketFactory
在java.base/jdk.internal.loader.BuiltinClassLoader.loadClass（BuiltinClassLoader.java:583）~[na:na]
在java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass（ClassLoaders.java:178）~[na:na]
在java.base/java.lang.ClassLoader.loadClass（ClassLoader.java:521）~[na:na]
... 省略183个公共框架

---

我还在这里创建了一个Github问题：

由于从Maven Central复制粘贴导入而没有检查版本，所以使用了不同版本的库

使用的版本包括

1.1.1.RELEASE

和

1.1.3.RELEASE

。一次只能使用其中一个版本号

重构代码以消除此错误的可能性：

implementation("org.springframework.cloud:spring-cloud-gcp-starter-sql-postgresql:$springCloudGCPVersion")
implementation("org.springframework.cloud:spring-cloud-gcp-starter-pubsub:$springCloudGCPVersion")
implementation("org.springframework.cloud:spring-cloud-gcp-dependencies:$springCloudGCPVersion")
implementation("org.springframework.cloud:spring-cloud-gcp-starter:$springCloudGCPVersion")

---

使用BOM表也更好。事实上，当使用w/Spring引导时，它应该只导入Spring云BOM。我建议从start.spring.io生成初始项目。这将生成如下的渐变构建：