NoClassDefFoundError while activating ontologymanager.ontonet
-------------------------------------------------------------
Key: STANBOL-258
URL: https://issues.apache.org/jira/browse/STANBOL-258
Project: Stanbol
Issue Type: Bug
Components: KReS
Reporter: Rupert Westenthaler
Sometimes the activate method of ontologymanager.ontonet fails because of a
NoClassDefFoundError related to org/xml/sax/helpers/DefaultHandler. This is not
for every build and has never occurred on my local build. However it was
already several time the reason for faild Jenkins build.
The sling error.log shows the following exception in such cases. I will also
append the full log of build 287, because such logs are in the workspace and
will be overridden by the next build.
07.07.2011 18:01:25.250 *ERROR* [FelixStartLevel]
org.apache.stanbol.ontologymanager.ontonet
[org.apache.stanbol.ontologymanager.ontonet.impl.ONManagerImpl] The activate
method has thrown an exception (java.lang.NoClassDefFoundError:
org/xml/sax/helpers/DefaultHandler) java.lang.NoClassDefFoundError:
org/xml/sax/helpers/DefaultHandler
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
at
org.apache.felix.framework.ModuleImpl$ModuleClassLoader.findClass(ModuleImpl.java:1907)
at
org.apache.felix.framework.ModuleImpl.findClassOrResourceByDelegation(ModuleImpl.java:727)
at org.apache.felix.framework.ModuleImpl.access$400(ModuleImpl.java:71)
at
org.apache.felix.framework.ModuleImpl$ModuleClassLoader.loadClass(ModuleImpl.java:1768)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at
org.apache.felix.framework.ModuleImpl.getClassByDelegation(ModuleImpl.java:645)
at
org.apache.felix.framework.resolver.WireImpl.getClass(WireImpl.java:99)
at
org.apache.felix.framework.ModuleImpl.searchImports(ModuleImpl.java:1390)
at
org.apache.felix.framework.ModuleImpl.findClassOrResourceByDelegation(ModuleImpl.java:722)
at org.apache.felix.framework.ModuleImpl.access$400(ModuleImpl.java:71)
at
org.apache.felix.framework.ModuleImpl$ModuleClassLoader.loadClass(ModuleImpl.java:1768)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at
org.apache.stanbol.ontologymanager.ontonet.impl.ontology.OWLOntologyManagerFactoryImpl.<init>(OWLOntologyManagerFactoryImpl.java:57)
at
org.apache.stanbol.ontologymanager.ontonet.impl.ONManagerImpl.activate(ONManagerImpl.java:264)
at
org.apache.stanbol.ontologymanager.ontonet.impl.ONManagerImpl.activate(ONManagerImpl.java:238)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:227)
at
org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:38)
at
org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:591)
at
org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:472)
at
org.apache.felix.scr.impl.helper.ActivateMethod.invoke(ActivateMethod.java:146)
at
org.apache.felix.scr.impl.manager.ImmediateComponentManager.createImplementationObject(ImmediateComponentManager.java:226)
at
org.apache.felix.scr.impl.manager.ImmediateComponentManager.createComponent(ImmediateComponentManager.java:118)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:997)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:333)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:157)
at
org.apache.felix.scr.impl.config.ConfiguredComponentHolder.enableComponents(ConfiguredComponentHolder.java:256)
at
org.apache.felix.scr.impl.BundleComponentActivator.loadDescriptor(BundleComponentActivator.java:253)
at
org.apache.felix.scr.impl.BundleComponentActivator.initialize(BundleComponentActivator.java:147)
at
org.apache.felix.scr.impl.BundleComponentActivator.<init>(BundleComponentActivator.java:111)
at
org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:285)
at org.apache.felix.scr.impl.Activator.bundleChanged(Activator.java:203)
at
org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:807)
at
org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:729)
at
org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:610)
at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:3758)
at org.apache.felix.framework.Felix.startBundle(Felix.java:1780)
at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1156)
at
org.apache.felix.framework.StartLevelImpl.run(StartLevelImpl.java:264)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: org.xml.sax.helpers.DefaultHandler
not found by org.apache.stanbol.reasoners.hermit [24]
at
org.apache.felix.framework.ModuleImpl.findClassOrResourceByDelegation(ModuleImpl.java:787)
at org.apache.felix.framework.ModuleImpl.access$400(ModuleImpl.java:71)
at
org.apache.felix.framework.ModuleImpl$ModuleClassLoader.loadClass(ModuleImpl.java:1768)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 46 more
While porting the SolrYard form Solr version 1.4.1 to 3.2 I has similar
problems that where related to a packaged version of Xerxes that where not
compatible with the Xalan shipped with the Java Runtime. So basically as long
as components within your bundle just use normal XML functionality everything
is fine, because the packed version of Xerxes is used, but as soon as some XSLT
or XPath functionality is required Xalan classes are loaded that might
(depending on the JVM, ext and endorsed classpath) be incompatible to Xerxes.
In my case also packing a compatible version of Xalan solved the problem. I can
not say for sure that his is the cause but I might be an explanation for this.
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