Level number 20 is not recognized.

在用cxf做webservice时，遇到棘手的问题，请各位大侠帮忙！
Exception in thread "main" java.lang.IllegalStateException: Level number 20 is not recognized.
at org.slf4j.impl.JDK14LoggerAdapter.log(JDK14LoggerAdapter.java:529)
at org.apache.commons.logging.impl.SLF4JLocationAwareLog.info(SLF4JLocationAwareLog.java:120)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:305)
at org.apache.cxf.bus.spring.BusApplicationContext.<init>(BusApplicationContext.java:71)
at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:84)
at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:65)
at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:54)
at org.apache.cxf.BusFactory.getDefaultBus(BusFactory.java:69)
at org.apache.cxf.BusFactory.getThreadDefaultBus(BusFactory.java:106)
at org.apache.cxf.BusFactory.getThreadDefaultBus(BusFactory.java:97)
at org.apache.cxf.endpoint.AbstractEndpointFactory.getBus(AbstractEndpointFactory.java:73)
at org.apache.cxf.frontend.AbstractWSDLBasedEndpointFactory.initializeServiceFactory(AbstractWSDLBasedEndpointFactory.java:143)
at org.apache.cxf.frontend.AbstractWSDLBasedEndpointFactory.createEndpoint(AbstractWSDLBasedEndpointFactory.java:73)
at org.apache.cxf.frontend.ClientFactoryBean.create(ClientFactoryBean.java:51)
at org.apache.cxf.frontend.ClientProxyFactoryBean.create(ClientProxyFactoryBean.java:92)
at com.gsww.crm.webservice.test.Test.main(Test.java:17)