Naftuli Tzvi Kay Naftuli Tzvi Kay - 1 month ago 32
Java Question

ClassLoader does NOT provide an 'addTransformer(ClassFileTransformer)' method

I'm using Spring and AspectJ to do some nice weaving and I just ran into this issue after inserting

<context:load-time-weaver/>
into my application context:

Caused by: java.lang.IllegalStateException: ClassLoader [sun.misc.Launcher$AppClassLoader] does NOT provide an 'addTransformer(ClassFileTransformer)' method. Specify a custom LoadTimeWeaver or start your Java virtual machine with Spring's agent: -javaagent:org.springframework.instrument.jar
at org.springframework.context.weaving.DefaultContextLoadTimeWeaver.setBeanClassLoader(DefaultContextLoadTimeWeaver.java:83)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods(AbstractAutowireCapableBeanFactory.java:1419)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1391)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
... 21 common frames omitted


Do I need a custom JVM to run AspectJ?!? I can't ever remember having to do this before.

Answer

I can't find any documentation to support it, but I'm fairly certain that the standard JVM doesn't support Spring's style of load-time weaving. Spring's guide to enabling LTW in different environments implies that this is the case in its "Generic Java applications" section.

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