I am getting an error when I try to chain a GeoServer WPS subprocess in a gs:UnionFeatureCollection process.
<wps:Execute version="1.0.0" service="WPS" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.opengis.net/wps/1.0.0" xmlns:wfs="http://www.opengis.net/wfs" xmlns:wps="http://www.opengis.net/wps/1.0.0" xmlns:ows="http://www.opengis.net/ows/1.1" xmlns:gml="http://www.opengis.net/gml" xmlns:ogc="http://www.opengis.net/ogc" xmlns:wcs="http://www.opengis.net/wcs/1.1.1" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.opengis.net/wps/1.0.0 http://schemas.opengis.net/wps/1.0.0/wpsAll.xsd"> <ows:Identifier>gs:UnionFeatureCollection</ows:Identifier> <wps:DataInputs> <wps:Input> <ows:Identifier>first</ows:Identifier> <wps:Reference mimeType="text/xml" xlink:href="http://geoserver/wps" method="POST"> <wps:Body> <wps:Execute version="1.0.0" service="WPS"> <ows:Identifier>gs:Query</ows:Identifier> <wps:DataInputs> <wps:Input> <ows:Identifier>features</ows:Identifier> <wps:Reference mimeType="text/xml" xlink:href="http://geoserver/wfs" method="POST"> <wps:Body> <wfs:GetFeature service="WFS" version="1.0.0" outputFormat="GML2" xmlns:topp="http://www.openplans.org/topp"> <wfs:Query typeName="topp:states"/> </wfs:GetFeature> </wps:Body> </wps:Reference> </wps:Input> <wps:Input> <ows:Identifier>filter</ows:Identifier> <wps:Data> <wps:ComplexData mimeType="text/plain; subtype=cql"><![CDATA[contains("wkb_geometry",'POINT(-96.41 35.50)')]]></wps:ComplexData> </wps:Data> </wps:Input> </wps:DataInputs> <wps:ResponseForm> <wps:RawDataOutput mimeType="application/json"> <ows:Identifier>result</ows:Identifier> </wps:RawDataOutput> </wps:ResponseForm> </wps:Execute> </wps:Body> </wps:Reference> </wps:Input> <wps:Input> <ows:Identifier>second</ows:Identifier> <wps:Data> <wps:ComplexData mimeType="application/json"><![CDATA[{"type":"FeatureCollection","features":[...]}]]></wps:ComplexData> </wps:Data> </wps:Input> </wps:DataInputs> <wps:ResponseForm> <wps:RawDataOutput mimeType="application/json"> <ows:Identifier>result</ows:Identifier> </wps:RawDataOutput> </wps:ResponseForm> </wps:Execute> If I run this request (with some JSON in the CDATA block) I get a NullPointerException:
2016-04-13 14:29:53,393 INFO [geoserver.wps] - Request: getServiceInfo 2016-04-13 14:29:53,509 ERROR [wps.executor] - Process execution failed org.geotools.process.ProcessException: java.lang.NullPointerException at org.geotools.process.factory.AnnotationDrivenProcessFactory$InvokeMethodProcess.execute(AnnotationDrivenProcessFactory.java:565) at org.geoserver.wps.executor.ProcessStartupFilter$ProcessStartupWrapper.execute(ProcessStartupFilter.java:51) at org.geoserver.wps.executor.DefaultProcessManager$ProcessCallable.call(DefaultProcessManager.java:201) at org.geoserver.wps.executor.DefaultProcessManager$ProcessCallable.call(DefaultProcessManager.java:169) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.NullPointerException at org.geotools.process.vector.UnionFeatureCollection.execute(UnionFeatureCollection.java:57) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.geotools.process.factory.AnnotationDrivenProcessFactory$InvokeMethodProcess.execute(AnnotationDrivenProcessFactory.java:549) ... 7 more 2016-04-13 14:29:53,513 INFO [geoserver.wps] - Request: execute service = WPS version = 1.0.0 baseUrl = http://localhost:4080/geoserver/ identifier: value = gs:UnionFeatureCollection dataInputs: input[0]: identifier = net.opengis.ows11.impl.CodeTypeImpl@1bdca30 (value: first, codeSpace: null) reference = net.opengis.wps10.impl.InputReferenceTypeImpl@ea11c1 (body: net.opengis.wps10.impl.ExecuteTypeImpl@15f7579 (language: null, service: WPS, version: 1.0.0, baseUrl: null, extendedProperties: {}), encoding: null, href: http://geoserver/wps, method: POST, mimeType: text/xml, schema: null)input[0]: identifier = net.opengis.ows11.impl.CodeTypeImpl@1358603 (value: second, codeSpace: null) data = net.opengis.wps10.impl.DataTypeImpl@da231f responseForm: rawDataOutput: identifier = net.opengis.ows11.impl.CodeTypeImpl@ac5ddc (value: result, codeSpace: null) mimeType = application/json If I run the subprocess and paste the output of that into the input block then I get the correct answer back.
Can anyone see what I'm missing?
