NoClassDefFoundError: com/atlassian/confluence/xml/SafeXmlParserFactory after upgrading WebDav Plugin to 3.0.2
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Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Symptoms
WebDAV Plugin is disabled with this error:
You just upgraded the WebDAV Plugin to 3.0.2 in your Confluence 4.1 instance
The following appears in the atlassian-confluence.log:
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2012-04-19 16:56:08,642 ERROR [Spring executor 15] [extender.internal.activator.ContextLoaderListener] onOsgiApplicationEvent Application context refresh failed (NonValidatingOsgiBundleXmlApplicationContext(bundle=confluence.extra.webdav, config=osgibundle:/META-INF/spring/*.xml))
-- referer: http://127.0.0.1:8417/c417/plugins/servlet/upm | url: /c417/rest/plugins/1.0/ | userName: admin
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'webDavServlet' defined in URL [bundle://102.0:0/META-INF/spring/atlassian-plugins-spring.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.atlassian.confluence.extra.webdav.servlet.ConfluenceWebdavServlet]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/atlassian/confluence/xml/SafeXmlParserFactory
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:254)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:925)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:835)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:440)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.access$1600(AbstractDelegatedExecutionApplicationContext.java:69)
at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext$4.run(AbstractDelegatedExecutionApplicationContext.java:355)
at org.springframework.osgi.util.internal.PrivilegedUtils.executeWithCustomTCCL(PrivilegedUtils.java:85)
at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.completeRefresh(AbstractDelegatedExecutionApplicationContext.java:320)
at org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor$CompleteRefreshTask.run(DependencyWaiterApplicationContextExecutor.java:132)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.atlassian.confluence.extra.webdav.servlet.ConfluenceWebdavServlet]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/atlassian/confluence/xml/SafeXmlParserFactory
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:115)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:248)
... 21 more
Caused by: java.lang.NoClassDefFoundError: com/atlassian/confluence/xml/SafeXmlParserFactory
at com.atlassian.confluence.extra.webdav.servlet.ConfluenceWebdavServlet.<init>(ConfluenceWebdavServlet.java:51)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:100)
... 23 more
Caused by: java.lang.ClassNotFoundException: com.atlassian.confluence.xml.SafeXmlParserFactory
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.felix.framework.ExtensionManager$ExtensionManagerModule.getClassByDelegation(ExtensionManager.java:672)
at org.apache.felix.framework.resolver.WireImpl.getClass(WireImpl.java:99)
at org.apache.felix.framework.ModuleImpl.searchImports(ModuleImpl.java:1345)
at org.apache.felix.framework.ModuleImpl.findClassOrResourceByDelegation(ModuleImpl.java:711)
at org.apache.felix.framework.ModuleImpl.access$200(ModuleImpl.java:73)
at org.apache.felix.framework.ModuleImpl$ModuleClassLoader.loadClass(ModuleImpl.java:1690)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 29 moreCause
The plugin tries to load the com/atlassian/confluence/xml/SafeXmlParserFactory class which does not exist in Confluence 4.1. This is being tracked here: https://studio.plugins.atlassian.com/browse/WBDV-238
Workaround
Uninstall the plugin, and download the v3.0.0 of the plugin from https://marketplace.atlassian.com/plugins/confluence.extra.webdav/version/300 . Reupload the plugin via Confluence Admin >> Plugins >> Install Plugins >> Upload Plugin.
Updated on April 8, 2025
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