This issue is second hand as part of a review of pull request #856. A geoscript user has reported the following conflict when trying to switch to wfs-ng:
It appears to be caused by the xpp3 jar. Here is a portion of the stack trace:
May 28, 2015 9:39:44 AM org.geotools.data.ows.AbstractOpenWebService internalIssueRequest
SEVERE: Failed to execute request http://localhost:8080/geoserver/wfs?REQUEST=GetCapabilities&VERSION=1.1.0&SERVICE=WFS
Caught: java.lang.LinkageError: loader constraint violation: loader (instance of ) previously initiated loading for a different type with name "javax/xml/namespace/QName"
java.lang.LinkageError: loader constraint violation: loader (instance of ) previously initiated loading for a different type with name "javax/xml/namespace/QName"
at com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl.getXMLSchemaType(XMLGregorianCalendarImpl.java:1930)
at com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl.toXMLFormat(XMLGregorianCalendarImpl.java:1770)
at org.eclipse.emf.ecore.xml.type.internal.XMLCalendar.(XMLCalendar.java:191)
at org.eclipse.xsd.impl.type.XSDDateType.getValue(XSDDateType.java:29)
at org.eclipse.xsd.impl.type.XSDAnySimpleType.assess(XSDAnySimpleType.java:108)
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