The CDI 1.1 specification says about a @Specialized bean:
"When an enabled bean, as defined in Section 5.1.2, specializes a second bean, we can be certain that the second bean is never instantiated or called by the container. Even if the second bean defines a producer or observer method, the method will never be called."
JavaDoc of @Specializes even say that the specialized superclass bean is "disabled".
However, WELD do call observer methods of the superclass.
I have a "Java EE concepts" project that execute a series of Java EE tests using Arquillian and the test that test the behavior of @Specializes and supposedly disabled observer methods fail.
The project is Maven based and has two profiles for WildFly- and GlassFish remote servers. Feel free to clone and execute.
Read more on this error in the JavaDoc of the test class:
https://github.com/MartinanderssonDotcom/java-ee-concepts/blob/master/src/test/java/com/martinandersson/javaee/cdi/specializes/SpecializesTest.java
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