org.activiti.engine.ActivitiException: No router defined at org.activiti.rest.api.DefaultResource.execute(DefaultResource.java:42) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.restlet.resource.ServerResource.doHandle(ServerResource.java:449) at org.restlet.resource.ServerResource.get(ServerResource.java:645) at org.restlet.resource.ServerResource.doHandle(ServerResource.java:527) at org.restlet.resource.ServerResource.doNegotiatedHandle(ServerResource.java:587) at org.restlet.resource.ServerResource.doConditionalHandle(ServerResource.java:299) at org.restlet.resource.ServerResource.handle(ServerResource.java:846) at org.restlet.resource.Finder.handle(Finder.java:510) at org.restlet.routing.Filter.doHandle(Filter.java:156) at org.restlet.routing.Filter.handle(Filter.java:203) at org.restlet.routing.Router.doHandle(Router.java:497) at org.restlet.routing.Router.handle(Router.java:737) at org.restlet.routing.Filter.doHandle(Filter.java:156) at org.restlet.routing.Filter.handle(Filter.java:203) at org.restlet.routing.Filter.doHandle(Filter.java:156) at org.restlet.routing.Filter.handle(Filter.java:203) at org.restlet.routing.Filter.doHandle(Filter.java:156) at org.restlet.routing.Filter.handle(Filter.java:203) at org.restlet.routing.Filter.doHandle(Filter.java:156) at org.restlet.engine.application.StatusFilter.doHandle(StatusFilter.java:151) at org.restlet.routing.Filter.handle(Filter.java:203) at org.restlet.routing.Filter.doHandle(Filter.java:156) at org.restlet.routing.Filter.handle(Filter.java:203) at org.restlet.engine.ChainHelper.handle(ChainHelper.java:111) at org.restlet.engine.application.ApplicationHelper.handle(ApplicationHelper.java:72) at org.restlet.Application.handle(Application.java:388) at org.restlet.routing.Filter.doHandle(Filter.java:156) at org.restlet.routing.Filter.handle(Filter.java:203) at org.restlet.routing.Router.doHandle(Router.java:497) at org.restlet.routing.Router.handle(Router.java:737) at org.restlet.routing.Filter.doHandle(Filter.java:156) at org.restlet.routing.Filter.handle(Filter.java:203) at org.restlet.routing.Router.doHandle(Router.java:497) at org.restlet.routing.Router.handle(Router.java:737) at org.restlet.routing.Filter.doHandle(Filter.java:156) at org.restlet.routing.Filter.handle(Filter.java:203) at org.restlet.engine.ChainHelper.handle(ChainHelper.java:111) at org.restlet.Component.handle(Component.java:388) at org.restlet.Server.handle(Server.java:488) at org.restlet.engine.ServerHelper.handle(ServerHelper.java:71) at org.restlet.engine.http.HttpServerHelper.handle(HttpServerHelper.java:150) at org.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:1037) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:291) at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877) at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675) at java.lang.Thread.run(Thread.java:662)
You can't do a GET on /process-instance, only a POST. But when you do a POST you've to provide a JSON body. Did you look at the REST API description in the userguide?