Exception While Creating ErpConfigContext

Question

I'm getting this error while I'm trying to create ErpConfigContext. Does anyone have any ideas why this is happening?

Code snippet:

 @Bean
public ErpConfigContext erpConfigContext() {
    return new ErpConfigContext("S4HANA_CLOUD");
}

Stacktrace:

  *Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.sap.cloud.sdk.s4hana.connectivity.ErpConfigContext]: Factory method 'erpConfigContext' threw exception; nested exception is java.lang.ClassCastException: Cannot cast class com.sap.core.connectivity.apiext.cloud.configuration.CloudConnectivityConfiguration to interface com.sap.core.connectivity.api.configuration.ConnectivityConfiguration
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
    ... 59 common frames omitted*


*Caused by: java.lang.ClassCastException: **Cannot cast class com.sap.core.connectivity.apiext.cloud.configuration.CloudConnectivityConfiguration to interface com.sap.core.connectivity.api.configuration.ConnectivityConfiguration**
    at com.sap.cloud.sdk.cloudplatform.connectivity.ScpNeoDestinationFacade.lookupConnectivityConfiguration(ScpNeoDestinationFacade.java:40)
    at com.sap.cloud.sdk.cloudplatform.connectivity.ScpNeoDestinationFacade.getConnectivityConfiguration(ScpNeoDestinationFacade.java:59)
    at com.sap.cloud.sdk.cloudplatform.connectivity.ScpNeoDestinationFacade.getDestinationConfiguration(ScpNeoDestinationFacade.java:69)
    at com.sap.cloud.sdk.cloudplatform.connectivity.ScpNeoDestinationFacade.getGenericDestination(ScpNeoDestinationFacade.java:105)
    at com.sap.cloud.sdk.cloudplatform.connectivity.DestinationAccessor.getGenericDestination(DestinationAccessor.java:146)
    at com.sap.cloud.sdk.s4hana.connectivity.ErpConfigContext.<init>(ErpConfigContext.java:209)
    at com.sap.cloud.sdk.s4hana.connectivity.ErpConfigContext.<init>(ErpConfigContext.java:355)
    at com.sap.cloud.sdk.s4hana.connectivity.ErpConfigContext.<init>(ErpConfigContext.java:429)
    at com.sap.csc.timebackend.config.S4Beans.erpConfigContext(S4Beans.java:20)
    at com.sap.csc.timebackend.config.S4Beans$$EnhancerBySpringCGLIB$$5076fc70.CGLIB$erpConfigContext$1(<generated>)
    at com.sap.csc.timebackend.config.S4Beans$$EnhancerBySpringCGLIB$$5076fc70$$FastClassBySpringCGLIB$$bc447478.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358)
    at com.sap.csc.timebackend.config.S4Beans$$EnhancerBySpringCGLIB$$5076fc70.erpConfigContext(<generated>)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
    ... 60 common frames omitted*

Answer 1

I solved the problem by setting the scope of this dependency to test because I use it only with this purpose:

 <dependency>
        <groupId>com.sap.cloud</groupId>
        <artifactId>neo-java-web-api</artifactId>
        <version>3.9.9</version>
        <scope>test</scope>
 </dependency>

Answer 2

This looks like a classloader issue, because CloudConnectivityConfiguration is definitely implementing ConnectivityConfiguration, see the class diagram below. Most likely the class and interface have been loaded by different class loaders.

Are you using Spring devtools? This can be a source for such isses, see the reference for an explanation and potential fix.