curl -u admin:geoserver -H 'Content-type: xml' -XPOST -d@'test.xml' http://localhost:8080/geoserver/wps
<?xml version="1.0" encoding="UTF-8"?><wps:ExecuteResponse xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:ows="http://www.opengis.net/ows/1.1" xmlns:wps="http://www.opengis.net/wps/1.0.0" xmlns:xlink="http://www.w3.org/1999/xlink" xml:lang="en" service="WPS" serviceInstance="http://localhost:8080/geoserver/ows?" version="1.0.0"><wps:Process wps:processVersion="1.0.0"><ows:Identifier>gs:GeoPackage</ows:Identifier><ows:Title>GeoPackage</ows:Title><ows:Abstract>Geopackage Process</ows:Abstract></wps:Process><wps:Status creationTime="2016-10-21T17:39:13.328Z"><wps:ProcessFailed><ows:ExceptionReport version="1.1.0"><ows:Exception exceptionCode="NoApplicableCode"><ows:ExceptionText>Process failed during execution
java.lang.NullPointerException</ows:ExceptionText></ows:Exception></ows:ExceptionReport></wps:ProcessFailed></wps:Status></wps:ExecuteResponse>Bryans-MBP:~ bryanmoore$