Osgi中碰到ArrayStoreException问题

在Gemini-blueprint中做proxy interface时，出现了这个错误。

先看JavaDoc的提示：

Thrown to indicate that an attempt has been made to store the wrong type of object into an array of objects. For example, the following code generates an ArrayStoreException:

     Object x[] = new String[3];
     x[0] = new Integer(0);

再看看代码

org.eclipse.gemini.blueprint.service.importer.support.AbstractServiceProxyCreator

public ProxyPlusCallback createServiceProxy(ServiceReference reference) { List advices = new ArrayList(4); // 1. the ServiceReference-like mixin Advice mixin = new ImportedOsgiServiceProxyAdvice(reference); advices.add(mixin); // 2. publication of bundleContext (if there is any) // TODO: make this configurable (so it can be disabled) advices.add(invokerBundleContextAdvice); // 3. TCCL handling (if there is any) Advice tcclAdvice = determineTCCLAdvice(reference); if (tcclAdvice != null) advices.add(tcclAdvice); // 4. add the infrastructure proxy // but first create the dispatcher since we need ServiceInvoker dispatcherInterceptor = createDispatcherInterceptor(reference); Advice infrastructureMixin = new InfrastructureOsgiProxyAdvice(dispatcherInterceptor); advices.add(infrastructureMixin); advices.add(dispatcherInterceptor); return new ProxyPlusCallback(ProxyUtils.createProxy(getInterfaces(reference), null, classLoader, bundleContext, advices), dispatcherInterceptor); }
ProxyUtils

public static Object createProxy(Class<?>[] classes, Object target, ClassLoader classLoader, BundleContext bundleContext, List advices) { return createProxy(classes, target, classLoader, bundleContext, (advices != null ? (Advice[]) advices .toArray(new Advice[advices.size()]) : new Advice[0])); }

AbstractServiceProxyCreator中的createproxy方法没有加入泛型约束，刚开始以为是这里可能出现bug。

后加入泛型约束

List<Advice> advices = new ArrayList<Advice>(4);

没有错误。应该不是代码的问题，而是ClassLoader的问题。因为ClassLoader的ClassDef不同,所以在ArrayList.toarray也会错误。

检查本地classloader，发现

web container 中有一个aopxxx.jar ,在web container中的osgi container也有一个,其他细节在这里就不描述了（涉及web container和osgi container share library），至此问题定位到了。

删除其中一个 container，保持aop类的classloader加载一致.