I will also add that libraries that operates at bytecode level (such as AspectJ) may be incompatible with newer JVM versions. This can be a problem since they a

I will also add that libraries that operates at bytecode level (such as AspectJ) may be incompatible with newer JVM versions. This can be a problem since they are often used by higher level frameworks to do their "magic" (one example being Spring) [1]. The solution is that you have to update either the library (which may not be compatible with the framework using it), or the whole framework. [1] https://stackoverflow.com/questions/23801950/spring-4-and-java-8-invalid-byte-tag-exception https://stackoverflow.com/questions/23801950/spring-4-and-ja...