java.lang.NoSuchMethodError: org.eclipse.core.runtime.IExtension.getNamespace()Ljava/lang/String;

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org.eclipse.core.runtime.IExtension.getNamespace()Ljava/lang/String;
java.lang.NoSuchMethodError: org.eclipse.core.runtime.IExtension.getNamespace()Ljava/lang/String;
at com.ibm.ws.websvcs.deployment.WASAxis2ConfigurationBuilder.discoverAxisModules(WASAxis2ConfigurationBuilder.java:763)
at com.ibm.ws.websvcs.deployment.WASAxis2ConfigurationBuilder.loadAxisClientModules(WASAxis2ConfigurationBuilder.java:373)
at com.ibm.ws.websvcs.client.WSClientConfigurationFactory.getConfigContext(WSClientConfigurationFactory.java:297)
at com.ibm.ws.websvcs.client.WSClientConfigurationFactory.getClientConfigurationContext(WSClientConfigurationFactory.java:235)
at org.apache.axis2.jaxws.description.impl.DescriptionFactoryImpl.createServiceDescription(DescriptionFactoryImpl.java:92)
at org.apache.axis2.jaxws.description.impl.DescriptionFactoryImpl.createServiceDescription(DescriptionFactoryImpl.java:79)
at org.apache.axis2.jaxws.spi.ServiceDelegate.(ServiceDelegate.java:247)
at org.apache.axis2.jaxws.spi.Provider.createServiceDelegate(Provider.java:83)
at javax.xml.ws.Service.(Service.java:77)

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