[wildfly-dev] Failed to define class

[Sam Thomas]

Hi guys!

Through the Instrumentation object that I receive when I register an agent
I can obtain all the loaded classes.

Now each of these loaded classes (Class objects) I use getClasses() and
getDeclaredClasses() to get the list of classes that are referred to within
the loaded class as well as the Method equivalents to get methods of that
loaded class.
The thing is those methods fail sometimes for reasons I am not sure of. I
catch the NoClassDefFoundError in my code, but Jboss still dumps a warn
message in console for the same.
How can I prevent Jboss from dumping this log - since this error was
already caught by my code - or is there a way of avoiding this somehow.

As an example,

On the class object for
org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator
when
I call getClasses(), it fails with the below stack  - which I do catch for
NoClassDefFoundError.

java.lang.NoClassDefFoundError: Failed to link
org/springframework/aop/aspectj/autoproxy/AspectJAwareAdvisorAutoProxyCreator$PartiallyComparableAdvisorHolder
(Module "deployment.spring-greeter.war" from Service Module Loader):
org/aspectj/util/PartialOrder$PartialComparable

        at java.lang.ClassLoader.defineClass1(Native Method)

        at java.lang.ClassLoader.defineClass(ClassLoader.java:763)

        at java.lang.ClassLoader.defineClass(ClassLoader.java:839)

        at
org.jboss.modules.ModuleClassLoader.doDefineOrLoadClass(ModuleClassLoader.java:424)

        at
org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:519)

        at
org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:339)

        at
org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:126)

        at org.jboss.modules.Module.loadModuleClass(Module.java:731)

        at
org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:247)

        at
org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:410)

        at
org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)

        at
org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)

        at java.lang.Class.getDeclaredClasses0(Native Method)

        at java.lang.Class.getDeclaredClasses(Class.java:1867)

        at java.lang.Class$2.run(Class.java:1504)

        at java.lang.Class$2.run(Class.java:1499)

        at java.security.AccessController.doPrivileged(Native Method)

        at java.lang.Class.getClasses(Class.java:1498)


But i see this warn message on the console from jboss

2020-01-24 20:37:32,458 WARN  [org.jboss.modules.define] (Agent-Thread)
Failed to define class
org.springframework.aop.aspectj.autoproxy.AspectJAwareAdvisorAutoProxyCreator$PartiallyComparableAdvisorHolder
in Module "deployment.spring-greeter.war" from Service Module Loader:
java.lang.NoClassDefFoundError: Failed to link
org/springframework/aop/aspectj/autoproxy/AspectJAwareAdvisorAutoProxyCreator$PartiallyComparableAdvisorHolder
(Module "deployment.spring-greeter.war" from Service Module Loader):
org/aspectj/util/PartialOrder$PartialComparable

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(ClassLoader.java:763)

at java.lang.ClassLoader.defineClass(ClassLoader.java:839)

at
org.jboss.modules.ModuleClassLoader.doDefineOrLoadClass(ModuleClassLoader.java:424)

at
org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:519)

at
org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:339)

at
org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:126)

at org.jboss.modules.Module.loadModuleClass(Module.java:731)

at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:247)

at
org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:410)

at
org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)

at
org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)

at java.lang.Class.getDeclaredClasses0(Native Method)

at java.lang.Class.getDeclaredClasses(Class.java:1867)

at java.lang.Class$2.run(Class.java:1504)

at java.lang.Class$2.run(Class.java:1499)

at java.security.AccessController.doPrivileged(Native Method)

at java.lang.Class.getClasses(Class.java:1498)




Thanks
./Sam
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