单个项目中的多个Spring Cloud GCP库导致没有ClassDefFoundError

Question

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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

我还在这里创建了一个Github问题:https://Github.com/spring-cloud/spring-cloud-gcp/issues/1948

Answer 1

由于在没有检查版本的情况下从Maven Central复制粘贴导入，因此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。一次只应该使用其中一个版本号。

重构代码以消除此错误的位置：

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")