Hybris custom ycommercewebservices extension throwing error creating bean with name 'extendedCartsController' - sap-commerce-cloud

Question

I've created a new extension with ant extgen command using ycommercewebservices template.
When I compile and start the server, I see this error:
The error that spring throws is:
ERROR [localhost-startStop-6] (junit) [ContextLoader] Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with
name 'extendedCartsController': Injection of resource dependencies failed; nested
exception is org.springframework.beans.factory.BeanCreationException: Error creating
bean with name 'defaultDataMapper' defined in ServletContext resource [/WEB-
INF/config/v2/dto-mappings-v2-spring.xml]: Cannot resolve reference to bean
'fieldSetBuilder' while setting bean property 'fieldSetBuilder'; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating bean with
name 'defaultFieldSetBuilder' defined in ServletContext resource [/WEB-
INF/config/v2/dto-level-mappings-v2-spring.xml]: Initialization of bean failed;
nested exception is org.springframework.aop.framework.AopConfigException: Unexpected
AOP exception; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating bean with
name 'org.springframework.cache.interceptor.CacheInterceptor#0': Cannot resolve
reference to bean 'compositeWsCacheManager' while setting bean property
'cacheManager'; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating bean with
name 'defaultCompositeWSCacheManager' defined in ServletContext resource [/WEB-
INF/config/common/cache-config-spring.xml]: Cannot resolve reference to bean
'wsCacheManagerList' while setting bean property 'cacheManagers'; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating bean with
name 'defaultWsCacheManagerList': Cannot resolve reference to bean
'defaultWSCacheManager' while setting bean property 'sourceList' with key [0]; nested
exception is org.springframework.beans.factory.BeanCreationException: Error creating
bean with name 'defaultWSCacheManager' defined in ServletContext resource [/WEB-
INF/config/common/cache-config-spring.xml]: Cannot resolve reference to bean
'wsEhcache' while setting bean property 'cacheManager'; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating bean with
name 'defaultWSEhcache' defined in ServletContext resource [/WEB-
INF/config/common/cache-config-spring.xml]: Invocation of init method failed; nested
exception is net.sf.ehcache.CacheException: Another CacheManager with same name
'wsCache_junit' already exists in the same VM. Please provide unique names for each
CacheManager in the config or do one of following:
1. Use one of the CacheManager.create() static factory methods to reuse same
CacheManager with same name or create one if necessary
2. Shutdown the earlier cacheManager before creating new one with same name.
I didn't touch anything of the custom extension, am I missing something?

Answer 1

Always look at the last segment of these items to find the cause. In your case it seems fairly self-explanatory:
Error creating bean with name 'defaultWSEhcache' defined in
ServletContext resource [/WEB-
INF/config/common/cache-config-spring.xml]: Invocation of init method
failed; nested exception is net.sf.ehcache.CacheException: Another
CacheManager with same name 'wsCache_junit' already exists in the
same VM. Please provide unique names for each CacheManager in the
config or do one of following:
Use one of the CacheManager.create() static factory methods to reuse same CacheManager with same name or create one if necessary
Shutdown the earlier cacheManager before creating new one with same name.