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    <p>Using ant, I am trying to invoke a self-defined task, in which I am trying to call a web services using Axis2. I am providing all the jars by Class-Path manifest header in the parent jar. Both geronimo-stax-api_1.0_spec-1.0.1.jar and wstx-asl-3.2.4.jar are defined on Class-Path. StAX api(from geronimo-stax-api_1.0_spec-1.0.1.jar) is trying to use com.ctc.wstx.stax.WstxInputFactory(from wstx-asl-3.2.4.jar). I am getting Classloader can't locate the class. This seems to be a class loader problem, but I can't find anything wrong. The weird thing is if I put wstx-asl-3.2.4.jar on my system classpath, it will be located. But the jar spec from Sun/Oracle indicates Class-Path and system classpath function the same, use the same system class loader. BTW, as you see, some jars are osgi bundle, I am not sure this will cause any problem.</p> <p>The stacktrace is shown below:</p> <pre><code>javax.xml.stream.FactoryConfigurationError: Requested factory com.ctc.wstx.stax.WstxInputFactory cannot be located. Classloader =java.net.URLClassLoader@341960 at javax.xml.stream.FactoryLocator.loadFactory(FactoryLocator.java:120) at javax.xml.stream.FactoryLocator.locate(FactoryLocator.java:109) at javax.xml.stream.FactoryLocator.locate(FactoryLocator.java:54) at javax.xml.stream.XMLInputFactory.newInstance(XMLInputFactory.java:41) at org.apache.axiom.om.util.StAXUtils$7.run(StAXUtils.java:311) at java.security.AccessController.doPrivileged(Native Method) at org.apache.axiom.om.util.StAXUtils.getXMLInputFactory_perClassLoader(StAXUtils.java:306) at org.apache.axiom.om.util.StAXUtils.getXMLInputFactory(StAXUtils.java:76) at org.apache.axiom.om.util.StAXUtils.createXMLStreamReader(StAXUtils.java:131) at org.apache.axis2.util.XMLUtils.toOM(XMLUtils.java:596) at org.apache.axis2.util.XMLUtils.toOM(XMLUtils.java:581) at org.apache.axis2.deployment.DescriptionBuilder.buildOM(DescriptionBuilder.java:97) at org.apache.axis2.deployment.AxisConfigBuilder.populateConfig(AxisConfigBuilder.java:86) at org.apache.axis2.deployment.DeploymentEngine.populateAxisConfiguration(DeploymentEngine.java:641) at org.apache.axis2.deployment.FileSystemConfigurator.getAxisConfiguration(FileSystemConfigurator.java:116) at org.apache.axis2.context.ConfigurationContextFactory.createConfigurationContext(ConfigurationContextFactory.java:68) at org.apache.axis2.context.ConfigurationContextFactory.createConfigurationContextFromFileSystem(ConfigurationContextFactory.java:184) at org.apache.axis2.client.ServiceClient.configureServiceClient(ServiceClient.java:150) at org.apache.axis2.client.ServiceClient.&lt;init&gt;(ServiceClient.java:143) at org.apache.axis2.client.ServiceClient.&lt;init&gt;(ServiceClient.java:244) </code></pre>
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