Why GeneratedSerializationConstructorAccessor is not cached

Our catalina.out (tomcat log) is full with: [Loaded sun.reflect.GeneratedSerializationConstructorAccessor3271319 from JVM_DefineClass]

1. How can i know which classes reflection (serialization) is responsible to this generation ?
2. The all idea to not use JNI reflection and to generate classes for this is to be able to cache them and save the init time - "These class objects are singleton per classloader, and hence we have only one instance of a generated accessor per classloader of a given Class. This means that we would have same number of accessors as the number of classes present in the deployment" The number of GeneratedSerializationConstructorAccessor is keep growing , so i dont understand why caching is not working ?