java linkage error

https://docs.jboss.org/jbossas/docs/Server_Configuration_Guide/4/html/Class_Loading_and_Types_in_Java-LinkageErrors___Making_Sure_You_Are_Who_You_Say_You_Are.html

basically, it’s same class (FQ class name) being loaded from different class loaders. It’s a constraint check implemented by JVM since 1.2.

So that given permission to a class from one classloader, doesn’t grant the same permission to “same” class loaded by another classloader by default.

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