Hi,
Every so often, I would get the following stack trace below when running
some integration tests with Spring-DM. Since it does not happen
everytime, I suspect that it is a threading/race issue.
The complete environment is Spring-DM 1.2, Spring 2.5.6 and using Camel
2.0.0 running inside of Felix 1.8.0.
Looking at the CamelNamespaceHandler's parseUsingJaxb() method, it is coded
like so.
protected Object parseUsingJaxb(Element element, ParserContext
parserContext) {
try {
binder = getJaxbContext().createBinder();
return binder.unmarshal(element);
} catch (JAXBException e) {
throw new BeanDefinitionStoreException("Failed to parse JAXB
element: " + e, e);
}
}
I wonder if the binder.unmarshal(element) is causing an issue because
multiple Spring-DM extender threads may be calling this. The
https://jaxb.dev.java.net/guide/Performance_and_thread_safety.html
hints that an unmarshaller should be created for each thread. I don't know
that much about jaxb, so I'm not sure that if that is the cause or not.
Thanks,
Allen
Stacktrace below:
org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected
exception parsing XML document from URL
[bundle://45.0:0/META-INF/spring/osgi-test-context.xml]; nested exception is
java.lang.NullPointerException
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:420)
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:342)
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:310)
at
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143)
at
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178)
at
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149)
at
org.springframework.osgi.context.support.OsgiBundleXmlApplicationContext.loadBeanDefinitions(OsgiBundleXmlApplicationContext.java:176)
at
org.springframework.osgi.context.support.OsgiBundleXmlApplicationContext.loadBeanDefinitions(OsgiBundleXmlApplicationContext.java:142)
at
org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:123)
at
org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:422)
at
org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.access$800(AbstractDelegatedExecutionApplicationContext.java:69)
at
org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext$3.run(AbstractDelegatedExecutionApplicationContext.java:269)
at
org.springframework.osgi.util.internal.PrivilegedUtils.executeWithCustomTCCL(PrivilegedUtils.java:85)
at
org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.startRefresh(AbstractDelegatedExecutionApplicationContext.java:247)
at
org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor.stageOne(DependencyWaiterApplicationContextExecutor.java:222)
at
org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor.refresh(DependencyWaiterApplicationContextExecutor.java:175)
at
org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.refresh(AbstractDelegatedExecutionApplicationContext.java:175)
at
org.springframework.osgi.extender.internal.activator.ContextLoaderListener$2.run(ContextLoaderListener.java:718)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
at com.sun.xml.bind.v2.util.QNameMap.getEntry(QNameMap.java:460)
at com.sun.xml.bind.v2.util.QNameMap.get(QNameMap.java:158)
at
com.sun.xml.bind.v2.runtime.unmarshaller.StructureLoader.startElement(StructureLoader.java:198)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:481)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:459)
at
com.sun.xml.bind.v2.runtime.unmarshaller.InterningXmlVisitor.startElement(InterningXmlVisitor.java:71)
at
com.sun.xml.bind.v2.runtime.unmarshaller.SAXConnector.startElement(SAXConnector.java:148)
at com.sun.xml.bind.unmarshaller.DOMScanner.visit(DOMScanner.java:239)
at com.sun.xml.bind.unmarshaller.DOMScanner.scan(DOMScanner.java:122)
at com.sun.xml.bind.unmarshaller.DOMScanner.scan(DOMScanner.java:100)
at
com.sun.xml.bind.v2.runtime.BinderImpl.associativeUnmarshal(BinderImpl.java:156)
at com.sun.xml.bind.v2.runtime.BinderImpl.unmarshal(BinderImpl.java:127)
at
org.apache.camel.spring.handler.CamelNamespaceHandler.parseUsingJaxb(CamelNamespaceHandler.java:145)
at
org.apache.camel.spring.handler.CamelNamespaceHandler$CamelContextBeanDefinitionParser.doParse(CamelNamespaceHandler.java:199)
at
org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser.parseInternal(AbstractSingleBeanDefinitionParser.java:84)
at
org.springframework.beans.factory.xml.AbstractBeanDefinitionParser.parse(AbstractBeanDefinitionParser.java:56)
at
org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:69)
at
org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1297)
at
org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1287)
at
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:135)
at
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:92)
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:507)
at
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:398)
... 18 more
Exception in thread "SpringOsgiExtenderThread-8"
java.lang.IllegalStateException: BeanFactory not initialized or already
closed - call 'refresh' before accessing beans via the ApplicationContext
at
org.springframework.context.support.AbstractRefreshableApplicationContext.getBeanFactory(AbstractRefreshableApplicationContext.java:153)
at
org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor.close(DependencyWaiterApplicationContextExecutor.java:345)
at
org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor.fail(DependencyWaiterApplicationContextExecutor.java:401)
at
org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor.stageOne(DependencyWaiterApplicationContextExecutor.java:287)
at
org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor.refresh(DependencyWaiterApplicationContextExecutor.java:175)
at
org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.refresh(AbstractDelegatedExecutionApplicationContext.java:175)
at
org.springframework.osgi.extender.internal.activator.ContextLoaderListener$2.run(ContextLoaderListener.java:718)
at java.lang.Thread.run(Thread.java:619)
--
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