Question

我通过Arquillian（1.1.12.Final）向Tomcat 8.5.11部署了一个应用程序，其中查询了webervice。该应用程序将Apache CXF 3.1.10作为提供的依赖项;所有cxf和spring JAR都被添加到Tomcat上的endorsed库目录中（我已验证所有已批准的JAR都已正确加载）。

尽管如此，我还是遇到了上述错误消息。堆栈跟踪的相关位是

java.lang.NullPointerException
    at org.apache.cxf.BusFactory.getBusFactoryClass(BusFactory.java:397)
    at org.apache.cxf.BusFactory.newInstance(BusFactory.java:317)
    at org.apache.cxf.BusFactory.newInstance(BusFactory.java:304)
    at org.apache.cxf.BusFactory.getDefaultBus(BusFactory.java:107)
    at org.apache.cxf.BusFactory.createThreadBus(BusFactory.java:244)
    at org.apache.cxf.BusFactory.getThreadDefaultBus(BusFactory.java:228)
    at org.apache.cxf.jaxws.ServiceImpl.initialize(ServiceImpl.java:135)
    at org.apache.cxf.jaxws.ServiceImpl.<init>(ServiceImpl.java:129)
    at org.apache.cxf.jaxws.spi.ProviderImpl.createServiceDelegate(ProviderImpl.java:82)
    at javax.xml.ws.Service.<init>(Service.java:77)

[剪断]

java.lang.NullPointerException
    at org.apache.cxf.bus.extension.ExtensionManagerImpl.load(ExtensionManagerImpl.java:166)
    at org.apache.cxf.bus.extension.ExtensionManagerImpl.load(ExtensionManagerImpl.java:160)
    at org.apache.cxf.bus.extension.ExtensionManagerImpl.load(ExtensionManagerImpl.java:107)
    at org.apache.cxf.bus.extension.ExtensionManagerBus.<init>(ExtensionManagerBus.java:178)
    at org.apache.cxf.bus.extension.ExtensionManagerBus.<init>(ExtensionManagerBus.java:185)
    at org.apache.cxf.bus.CXFBusFactory.createBus(CXFBusFactory.java:40)
    at org.apache.cxf.bus.CXFBusFactory.createBus(CXFBusFactory.java:36)
    at org.apache.cxf.bus.CXFBusFactory.createBus(CXFBusFactory.java:32)
    at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:146)
    at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:122)
    at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:94)
    at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:83)
    at org.apache.cxf.BusFactory.getDefaultBus(BusFactory.java:107)
    at org.apache.cxf.BusFactory.createThreadBus(BusFactory.java:244)
    at org.apache.cxf.BusFactory.getThreadDefaultBus(BusFactory.java:228)
    at org.apache.cxf.jaxws.ServiceImpl.initialize(ServiceImpl.java:135)
    at org.apache.cxf.jaxws.ServiceImpl.<init>(ServiceImpl.java:129)
    at org.apache.cxf.jaxws.spi.ProviderImpl.createServiceDelegate(ProviderImpl.java:82)
    at javax.xml.ws.Service.<init>(Service.java:77)

NPE在Web服务初始化期间发生。失败的代码是

// org.apache.cxf.bus.extension.ExtensionManagerImpl
final void load(String resource) throws IOException {
    if (loader != getClass().getClassLoader()) {
        load(resource, getClass().getClassLoader());
    }
    load(resource, loader);
}

事实证明，对getClass().getClassLooader()的调用会返回null。我对这个结果感到困惑，却发现getClass().getClassLoader() is null, why?对我来说仍然没有意义，因为我认为这意味着CXF是使用bootclasspath加载的（！？！）。

Answer 1

问题是由于在$CATALINA_HOME/endoresed中放置了CXF广告牌引起的。这是放置所有webapps共有的jar的错误位置。正如在{XML Parsers and Java“部分的http://tomcat.apache.org/tomcat-7.0-doc/class-loader-howto.html中所解释的那样。

Tomcat8 org.apache.cxf.BusFactory.getBusFactoryClass无法确定BusFactory实现类名

1 个答案: