ConcurrentModificationException in JAXB-WS frontend
---------------------------------------------------

                 Key: CXF-2803
                 URL: https://issues.apache.org/jira/browse/CXF-2803
             Project: CXF
          Issue Type: Bug
          Components: JAX-WS Runtime
    Affects Versions: 2.2.5
         Environment: JBOSS 5.0 EAP - JDK 1.6.0_11
            Reporter: sam ven


Received following error when invoking ws using  CXF generated client(spring) 
with 20 concurrent users. I see similar issue reporeted with 2.0 but there were 
no fix.

Caused by: java.util.ConcurrentModificationException
        at 
java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
        at java.util.LinkedHashMap$KeyIterator.next(LinkedHashMap.java:384)
        at org.apache.cxf.jaxb.JAXBUtils.scanPackages(JAXBUtils.java:741)
        at 
org.apache.cxf.jaxb.JAXBDataBinding.createJAXBContextAndSchemas(JAXBDataBinding.java:481)
        at 
org.apache.cxf.jaxb.JAXBDataBinding.initialize(JAXBDataBinding.java:334)
        at 
org.apache.cxf.service.factory.ReflectionServiceFactoryBean.buildServiceFromClass(ReflectionServiceFactoryBean.java:460)
        at 
org.apache.cxf.jaxws.support.JaxWsServiceFactoryBean.buildServiceFromClass(JaxWsServiceFactoryBean.java:548)
        at 
org.apache.cxf.service.factory.ReflectionServiceFactoryBean.initializeServiceModel(ReflectionServiceFactoryBean.java:523)
        at 
org.apache.cxf.service.factory.ReflectionServiceFactoryBean.create(ReflectionServiceFactoryBean.java:271)
        at 
org.apache.cxf.jaxws.support.JaxWsServiceFactoryBean.create(JaxWsServiceFactoryBean.java:177)
        at 
org.apache.cxf.frontend.AbstractWSDLBasedEndpointFactory.createEndpoint(AbstractWSDLBasedEndpointFactory.java:100)
        at 
org.apache.cxf.frontend.ClientFactoryBean.create(ClientFactoryBean.java:51)
        at 
org.apache.cxf.frontend.ClientProxyFactoryBean.create(ClientProxyFactoryBean.java:102)
        at 
org.apache.cxf.jaxws.JaxWsProxyFactoryBean.create(JaxWsProxyFactoryBean.java:115)
        at 
org.apache.cxf.jaxws.spring.JaxWsProxyFactoryBeanDefinitionParser$JAXWSSpringClientProxyFactoryBean.getObject(JaxWsProxyFactoryBeanDefinitionParser.java:74)
        at 
org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:143)

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