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Duplicate classloading with Javassist Reflect
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created by <a href="http://community.jboss.org/people/alesj">Ales Justin</a> in <i>JBoss Microcontainer Development</i> - <a href="http://community.jboss.org/message/538334#538334">View the full discussion</a>
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<div class="jive-rendered-content"><p>I'm getting this unexpected behavior while testing my Scanning lib.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java">org.jboss.reflect.spi.CannotCompileException: javassist.CannotCompileException: by java.lang.LinkageError: loader (instance of  org/jboss/classloader/spi/base/BaseClassLoader): attempted  duplicate <font color="navy"><b>class</b></font> definition <font color="navy"><b>for</b></font> name: <font color="red">"org/jboss/test/scanning/annotations/support/FilteredAnnotationScanningPluginFactory"</font>
    at org.jboss.reflect.plugins.javassist.JavassistUtil.ctClassToClass(JavassistUtil.java:56)
    at org.jboss.reflect.plugins.javassist.JavassistTypeInfo.getType(JavassistTypeInfo.java:195)
    at org.jboss.metadata.spi.signature.Signature.convertParameterTypes(Signature.java:151)
    at org.jboss.metadata.spi.signature.ConstructorSignature.<init>(ConstructorSignature.java:77)
    at org.jboss.metadata.spi.signature.Signature.getSignature(Signature.java:121)
    at org.jboss.scanning.plugins.visitor.ClassHierarchyResourceVisitor.handleAnnotations(ClassHierarchyResourceVisitor.java:200)
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I think this should not happen, since there should be only one instance of matching TypeInfo/ClassInfo.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>But it looks like we're missing a check if the CtClass is already loaded by the underlying classloader inside that TI/CI instance.</p><p>Or some other mechanism that would prevent it from getting this duplicate behavior.</p></div>
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