SqlInitializationAutoConfiguration fails when there is a DataSource bean and no spring-jdbc or a ConnectionFactory bean and no spring-r2dbc

[kdebski85]

SqlInitializationAutoConfiguration throws java.lang.ClassNotFoundException: org.springframework.jdbc.datasource.init.DatabasePopulator without spring-jdbc.

SqlInitializationAutoConfiguration should be skipped when DatabasePopulator (from spring-jdbc) is unavailable.

My application does not need spring-jdbc or any database initialization.
As a workaround, I use:
@SpringBootApplication(exclude = SqlInitializationAutoConfiguration.class)

SqlInitializationAutoConfiguration was added in Spring Boot 2.5.0 - #25323

The full stack trace:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfigura
tion.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.jdbc.init.DataSourceScriptDatabaseInitializer]: Factory m
ethod 'dataSourceScriptDatabaseInitializer' threw exception; nested exception is java.lang.NoClassDefFoundError: org.springframework.jdbc.datasource.init.DatabasePopulator                                                                   
        at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                                                          
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:638) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                                        
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334) ~[spring-beans-5.3.7.jar!/:5.3.7]                                         
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                    
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                           
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                             
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                                                   
        at org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$206.00000000117CDEA0.getObject(Unknown Source) ~[na:na]                                                                                                      
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                                       
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                                                            
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                                                              
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                               
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.7.jar!/:5.3.7]                                                            
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.7.jar!/:5.3.7]                                                                                    
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.0.jar!/:2.5.0]                                                              
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.5.0.jar!/:2.5.0]                                                                                                                     
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:438) [spring-boot-2.5.0.jar!/:2.5.0]                                                                                                              
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:337) [spring-boot-2.5.0.jar!/:2.5.0]                                                                                                                         
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1336) [spring-boot-2.5.0.jar!/:2.5.0]                                                                                                                        
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1325) [spring-boot-2.5.0.jar!/:2.5.0]                                                                                                                        
        at com.foo.bar.MySpringBootApplication.main(MySpringBootApplication.java:25) [classes!/:2.0.0-SNAPSHOT]                                                                           
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0]                                                                                                                                                            
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90) ~[na:1.8.0]                                                                                                                                          
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55) ~[na:1.8.0]                                                                                                                                  
        at java.lang.reflect.Method.invoke(Method.java:508) ~[na:1.8.0]                                                                                                                                                                       
        at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49) [my-app-spring-boot-2.0.0-SNAPSHOT.jar:2.0.0-SNAPSHOT]                                                                                 
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:108) [my-app-spring-boot-2.0.0-SNAPSHOT.jar:2.0.0-SNAPSHOT]                                                                                             
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:58) [my-app-spring-boot-2.0.0-SNAPSHOT.jar:2.0.0-SNAPSHOT]                                                                                              
        at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88) [my-app-spring-boot-2.0.0-SNAPSHOT.jar:2.0.0-SNAPSHOT]                                                                                          
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.jdbc.init.DataSourceScriptDatabaseInitializer]: Factory method 'dataSourceScriptDatabaseInitializer' threw exception; nested 
exception is java.lang.NoClassDefFoundError: org.springframework.jdbc.datasource.init.DatabasePopulator                                                                                                                                       
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                                          
        at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                                                          
        ... 28 common frames omitted                                                                                                                                                                                                          
Caused by: java.lang.NoClassDefFoundError: org.springframework.jdbc.datasource.init.DatabasePopulator                                                                                                                                         
        at org.springframework.boot.autoconfigure.sql.init.DataSourceInitializationConfiguration.dataSourceScriptDatabaseInitializer(DataSourceInitializationConfiguration.java:41) ~[spring-boot-autoconfigure-2.5.0.jar!/:2.5.0]            
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0]                                                                                                                                                            
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90) ~[na:1.8.0]                                                                                                                                          
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55) ~[na:1.8.0]                                                                                                                                  
        at java.lang.reflect.Method.invoke(Method.java:508) ~[na:1.8.0]                                                                                                                                                                       
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.3.7.jar!/:5.3.7]                                                                          
        ... 29 common frames omitted                                                                                                                                                                                                          
Caused by: java.lang.ClassNotFoundException: org.springframework.jdbc.datasource.init.DatabasePopulator                                                                                                                                       
        at java.net.URLClassLoader.findClass(URLClassLoader.java:610) ~[na:1.8.0]                                                                                                                                                             
        at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:925) ~[na:2.9 (10-29-2018)]                                                                                                                                                 
        at java.lang.ClassLoader.loadClass(ClassLoader.java:870) ~[na:2.9 (10-29-2018)]                                                                                                                                                       
        at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:151) ~[my-app-spring-boot-2.0.0-SNAPSHOT.jar:2.0.0-SNAPSHOT]                                                             
        at java.lang.ClassLoader.loadClass(ClassLoader.java:853) ~[na:2.9 (10-29-2018)]                                                                                                                                                       
        ... 35 common frames omitted            

[kdebski85]

This issue might be related - #26849 but the error is different

[kdebski85]

It is probably enough to add@ConditionalOnClass(DatabasePopulator.class) to SqlInitializationAutoConfiguration class