java.lang.ClassCastException：无法将 org.glassfish.web.loader.WebappClassLoader 转换为 org.osgi.framework.BundleReference

Question

我正在使用 Glassfish 和 OSGI 开发一个简单的应用程序。我找到了这个教程： http://blogs.oracle.com/arungupta/entry/totd_154_dynamic_osgi_services 我修改了这个例子。您可以找到我的自定义示例文件： http://uploading.com/files/cf1ffd63/test.zip/ 我用 web 模块和 EJB 模块创建了 EAR 包。我创建了一个调用 OSGI 包的会话 bean。我成功编译了项目。问题是，当我将包上传到 Glassfish 应用程序服务器并尝试将简单的小程序打开到 Web 模块中时，会出现此错误消息：

HTTP Status 500 -

type Exception report

message

descriptionThe server encountered an internal error () that prevented it from fulfilling this request.

exception

java.lang.ClassCastException: Cannot cast org.glassfish.web.loader.WebappClassLoader to org.osgi.framework.BundleReference

note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 3.1.1 logs.
GlassFish Server Open Source Edition 3.1.1

也许问题是缺少依赖。我找不到问题？您知道可能是什么问题吗？

Answer 1

OSGi Core 4.2 规范 (org.osgi.framework;version=1.5) 的第 3.8.9 节要求所有捆绑类加载器都必须实现 BundleReference 接口。也许 GlassFish 中的类加载器不这样做？您的 GlassFish 版本支持哪个版本的 OSGi Core 规范？

Answer 2

您不应该将应用程序部署为 ear，这两个模块必须作为 OSGi 包单独部署

Answer 3

如果我理解正确的话，OSGI 的版本就是问题所在。在 web 模块中，我声明了这一点：

        <dependency>
            <groupId>org.glassfish</groupId>
            <artifactId>osgi-cdi-api</artifactId>
            <version>3.1-SNAPSHOT</version>
            <type>jar</type>
        </dependency> 

我需要添加其他内容吗？

附言 我使用 Glassfish 3.1.1 - 最新版本。这是已安装组件的列表：

 Source         Button to include column Source in sort.
felix           OSGi Service Platform Release 4     3.0.8-0     999KB   stable.glassfish.org
glassfish-appclient     Application Servers     3.1.1-12    1MB     stable.glassfish.org
glassfish-cluster   Application Servers     3.1.1-12    1MB     stable.glassfish.org
glassfish-cmp       Application Servers     3.1.1-12    2MB     stable.glassfish.org
glassfish-common    Application Servers     3.1.1-12    10MB    stable.glassfish.org
glassfish-common-full   Application Servers     3.1.1-12    210KB   stable.glassfish.org
glassfish-corba     Application Servers     3.1.0-30    2MB     stable.glassfish.org
glassfish-corba-base    Application Servers     3.1.0-30    794KB   stable.glassfish.org
glassfish-ejb       Application Servers     3.1.1-12    298KB   stable.glassfish.org
glassfish-ejb-lite  Application Servers     3.1.1-12    942KB   stable.glassfish.org
glassfish-full-incorporation    Application Servers     3.1.1-12    37KB    stable.glassfish.org
glassfish-full-profile  Application Servers     3.1.1-12    37KB    stable.glassfish.org
glassfish-grizzly   Application Servers     1.9.36-1    1007KB  stable.glassfish.org
glassfish-grizzly-full  Application Servers     1.9.36-1    163KB   stable.glassfish.org
glassfish-gui       Application Servers     3.1.1-12    8MB     stable.glassfish.org
glassfish-ha        Application Servers     3.1.1-12    53KB    stable.glassfish.org
glassfish-hk2       Application Servers     3.1.1-12    1MB     stable.glassfish.org
glassfish-javahelp  Application Servers     2.0.2-1     586KB   stable.glassfish.org
glassfish-jca       Application Servers     3.1.1-12    1MB     stable.glassfish.org
glassfish-jcdi      Application Servers     3.1.1-12    2MB     stable.glassfish.org
glassfish-jdbc      Application Servers     3.1.1-12    922KB   stable.glassfish.org
glassfish-jms       Application Servers     3.1.1-12    4MB     stable.glassfish.org
glassfish-jpa       Application Servers     3.1.1-12    5MB     stable.glassfish.org
glassfish-jsf       Application Servers     2.1.3-4     2MB     stable.glassfish.org
glassfish-jta       Application Servers     3.1.1-12    110KB   stable.glassfish.org
glassfish-jts       Application Servers     3.1.1-12    424KB   stable.glassfish.org
glassfish-management    Application Servers     3.1.1-12    334KB   stable.glassfish.org
glassfish-nucleus   Application Servers     3.1.1-12    3MB     stable.glassfish.org
glassfish-osgi-feature-pack     Application Servers     3.1.1-12    37KB    contrib.glassfish.org
glassfish-osgi-gui  Application Servers     3.1.1-12    656KB   contrib.glassfish.org
glassfish-osgi-http     Application Servers     3.1.1-12    66KB    stable.glassfish.org
glassfish-osgi-incorporation    Application Servers     3.1.1-12    37KB    contrib.glassfish.org
glassfish-registration  Application Servers     3.1.1-12    135KB   stable.glassfish.org
glassfish-upgrade   Application Servers     3.1.1-12    139KB   stable.glassfish.org
glassfish-web       Application Servers     3.1.1-12    3MB     stable.glassfish.org
glassfish-web-incorporation     Application Servers     3.1.1-12    37KB    stable.glassfish.org
glassfish-web-profile   Application Servers     3.1.1-12    37KB    stable.glassfish.org
javadb-client       Databases and Tools     10.6.2.1-1  527KB   stable.glassfish.org
javadb-common       Databases and Tools     10.6.2.1-1  60KB    stable.glassfish.org
javadb-core         Databases and Tools     10.6.2.1-1  4MB     stable.glassfish.org
jersey          Web Services    1.9-1.18    2MB     stable.glassfish.org
metro           Web Services    2.1.1-9     16MB    stable.glassfish.org
mq-bin-exe      Message-Oriented Middleware     4.5.1-3.2   297KB   stable.glassfish.org
mq-bin-sh       Message-Oriented Middleware     4.5.1-3.2   85KB    stable.glassfish.org
mq-config-gf        Message-Oriented Middleware     4.5.1-3.2   60KB    stable.glassfish.org
mq-core         Message-Oriented Middleware     4.5.1-3.2   4MB     stable.glassfish.org
mq-server       Message-Oriented Middleware     4.5.1-3.2   6MB     stable.glassfish.org
pkg             System Tools    1.122.2-54.2834     6MB     stable.glassfish.org
pkg-java        System Tools    1.122-54.2834   652KB   stable.glassfish.org
pkg-toolkit-incorporation   System Tools    2.3.4-54.2834   0KB     stable.glassfish.org
python2.4-minimal   System Tools    2.4.4.0-54.2834     6MB     stable.glassfish.org
shoal           Application Servers     1.5.34-0    536KB   stable.glassfish.org
updatetool      System Tools    2.3.4-54.2834   4MB     stable.glassfish.org
wxpython2.8-minimal     System Tools    2.8.10.1-54.2834    24MB    stable.glassfish.org