spring mapper beans / MapperScannerConfigurer

[eckardjf]

I am fairly new to both spring & mybatis - while creating a sample
project I encountered a strange error I can't seem to figure out - any
help would be appreciated.

Using the mybatis generator, I created artifacts (models, mappers &
xml) for a just a few of the 800+ total tables of an existing
database.
I was then able to successfully inject one of the mappers into a
service bean, and run a simple unit test to verify actual data was
being rerieved from the database.

However, when I created artifacts for all of the tables and attempted
to run the same unit test, I get:

... lines omitted ...

16:54:36.984 [main] DEBUG o.s.b.f.s.DefaultListableBeanFactory -
Creating shared instance of singleton bean 'userLoginMapper'
16:54:36.984 [main] DEBUG o.s.b.f.s.DefaultListableBeanFactory -
Creating instance of bean 'userLoginMapper'
16:54:36.985 [main] DEBUG o.s.b.f.s.DefaultListableBeanFactory -
Eagerly caching bean 'userLoginMapper' to allow for resolving
potential circular references
16:54:36.985 [main] DEBUG o.s.b.f.annotation.InjectionMetadata -
Processing injected method of bean 'userLoginMapper':
AutowiredMethodElement for public final void
org.mybatis.spring.support.SqlSessionDaoSupport.setSqlSessionTemplate(org.mybatis.spring.SqlSessionTemplate)
16:54:36.986 [main] DEBUG o.s.b.f.s.DefaultListableBeanFactory -
Returning cached instance of singleton bean
'org.springframework.transaction.config.internalTransactionAdvisor'
16:54:36.986 [main] DEBUG o.s.b.f.s.DefaultListableBeanFactory -
Returning eagerly cached instance of singleton bean 'userLoginMapper'
that is not fully initialized yet - a consequence of a circular
reference
16:54:36.987 [main] DEBUG o.s.b.f.annotation.InjectionMetadata -
Processing injected method of bean 'userLoginMapper':
AutowiredMethodElement for public final void
org.mybatis.spring.support.SqlSessionDaoSupport.setSqlSessionFactory(org.apache.ibatis.session.SqlSessionFactory)
16:54:36.988 [main] DEBUG o.s.b.f.s.DefaultListableBeanFactory -
Returning cached instance of singleton bean 'sqlSessionFactory'
16:54:37.135 [main] ERROR o.s.web.context.ContextLoader - Context
initialization failed
java.lang.NoClassDefFoundError:
org.springframework.beans.BeansException
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:
527) ~[spring-beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:
456) ~[spring-beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory
$1.getObject(AbstractBeanFactory.java:294) ~[spring-
beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:
225) ~[spring-beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:
291) ~[spring-beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:
193) ~[spring-beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:
585) ~[spring-beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:
913) ~[spring-context-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:
464) ~[spring-context-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at
org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:
385) ~[spring-web-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at
org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:
284) ~[spring-web-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at
org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:
111) [spring-web-3.1.1.RELEASE.jar:3.1.1.RELEASE]


At one point I discovered that if I did nothing else but reduce the
number of mapper interfaces to some number below 370-375, the problem
goes away.
Which mappers I choose makes no difference, as long as the number is
below 370 - and if I choose to include a number between 370 and 375,
it appears to be random whether the problem occurs or not.

org.springframework.beans.BeansException is clearly on the
classpath... I thought it might be a memory problem, so I tried
running with -Xmx512m and -Xmx1024m but neither helped.