[MNG-5042] Regression: CloningClassLoader causes StackOverflowError in groovy

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0, 3.0.1, 3.0.2, 3.0.3
• Component/s: Class Loading
• Assignee: Unassigned
• Reporter: Patrick Staton
• Created: 14/Mar/11 11:32
• Updated: 23/Jan/14 14:37
• Resolved: 23/Jan/14 14:37

Description

I am unable to use a groovy class as a plexus component in maven 3 because groovy's metaclass mechanism calls Introspector.getBeanInfo() in constructors which in turn calls classloader.loadClass(beanClass.getName() + BEANINFO_SUFFIX) (the class name is "FooBar$_plexus2") which in turn causes CloningClassLoader to create a new clone of the class named "FooBar$plexus2BeanInfo". When "FooBar$_plexusBeanInfo" is instantiated groovy's the meta class mechanism again calls
Introspector.getBeanInfo() on "FooBar$__plexus2".

Example stack trace:

at sis.buildtools.SisMapVersionsPhase.$getStaticMetaClass(VersionsMojo.groovy)
        at sis.buildtools.SisMapVersionsPhase.<init>(VersionsMojo.groovy:692)
        at sis.buildtools.SisMapVersionsPhase$__plexus2BeanInfo.<init>(Unknown Source)
        at sun.reflect.GeneratedConstructorAccessor5.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at java.lang.Class.newInstance0(Class.java:355)
        at java.lang.Class.newInstance(Class.java:308)
        at java.beans.Introspector.instantiate(Introspector.java:1449)
        at java.beans.Introspector.findExplicitBeanInfo(Introspector.java:431)
        at java.beans.Introspector.<init>(Introspector.java:380)
        at java.beans.Introspector.getBeanInfo(Introspector.java:167)
        at groovy.lang.MetaClassImpl$15.run(MetaClassImpl.java:2940)
        at java.security.AccessController.doPrivileged(Native Method)
        at groovy.lang.MetaClassImpl.addProperties(MetaClassImpl.java:2938)
        at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:2921)
        at org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:166)
        at org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:182)
        at sis.buildtools.SisMapVersionsPhase.$getStaticMetaClass(VersionsMojo.groovy)
        at sis.buildtools.SisMapVersionsPhase.<init>(VersionsMojo.groovy:692)
        at sis.buildtools.SisMapVersionsPhase$__plexus2BeanInfo.<init>(Unknown Source)
        at sun.reflect.GeneratedConstructorAccessor5.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at java.lang.Class.newInstance0(Class.java:355)
        at java.lang.Class.newInstance(Class.java:308)
        at java.beans.Introspector.instantiate(Introspector.java:1449)
        at java.beans.Introspector.findExplicitBeanInfo(Introspector.java:431)
        at java.beans.Introspector.<init>(Introspector.java:380)
        at java.beans.Introspector.getBeanInfo(Introspector.java:167)
        at groovy.lang.MetaClassImpl$15.run(MetaClassImpl.java:2940)
        at java.security.AccessController.doPrivileged(Native Method)
        at groovy.lang.MetaClassImpl.addProperties(MetaClassImpl.java:2938)
        at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:2921)
        at org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:166)
        at org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:182)
        at sis.buildtools.SisMapVersionsPhase.$getStaticMetaClass(VersionsMojo.groovy)
        at sis.buildtools.SisMapVersionsPhase.<init>(VersionsMojo.groovy:692)
        at sis.buildtools.SisMapVersionsPhase$__plexus2BeanInfo.<init>(Unknown Source)
        at sun.reflect.GeneratedConstructorAccessor5.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at java.lang.Class.newInstance0(Class.java:355)
        at java.lang.Class.newInstance(Class.java:308)
        at java.beans.Introspector.instantiate(Introspector.java:1449)
        at java.beans.Introspector.findExplicitBeanInfo(Introspector.java:431)
        at java.beans.Introspector.<init>(Introspector.java:380)
        at java.beans.Introspector.getBeanInfo(Introspector.java:167)
        at groovy.lang.MetaClassImpl$15.run(MetaClassImpl.java:2940)
        at java.security.AccessController.doPrivileged(Native Method)
        at groovy.lang.MetaClassImpl.addProperties(MetaClassImpl.java:2938)
        at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:2921)
        at org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:166)
        at org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:182)
        at sis.buildtools.SisMapVersionsPhase.$getStaticMetaClass(VersionsMojo.groovy)
        at sis.buildtools.SisMapVersionsPhase.<init>(VersionsMojo.groovy:692)
        at sis.buildtools.SisMapVersionsPhase$__plexus2BeanInfo.<init>(Unknown Source)
        at sun.reflect.GeneratedConstructorAccessor5.newInstance(Unknown Source)