Java. Lang. classcastexception

Problem description:
The project runs on weblogic10. Every time I modify a classCodeWhen you access a page through the interceptor, an exception is reported:
Java. Lang. classcastexception: COM. xxx cannot be cast to com. xxx
The logic is that the previously stored object obtained from httpsession is forcibly converted to the original COM. xxx type.

Solution:
This exception does not occur after you implement the serializable interface of COM. xxx.

Analysis:
There is no detailed research on the specific cause. I guess it is like this:
After the class file is modified in the project running, WebLogic automatically recompiles the modified class after hot loading. This process is estimated that WebLogic will save the serialized objects before hot loading, during Hot loading, these objects are deserialized into the memory, which is caused by the fact that my class does not implement the serialization interface.