org.springframework.binding.mapping.RequiredMappingException: This mapping is required; evaluation of expression 'id' against source of type [class org.springframework.webflow.core.collection.LocalAttributeMap] must return a non-null value

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  • Consider this exception that throws when a required input mapping is not provided: SEVERE: Servlet.service() for servlet accounts threw exception org.springframework.binding.mapping.RequiredMappingException: This mapping is required; evaluation of expression 'id' against source of type [class org.springframework.webflow.core.collection.LocalAttributeMap] must return a non-null value at org.springframework.binding.mapping.Mapping.map(Mapping.java:99) at org.springframework.binding.mapping.DefaultAttributeMapper.map(DefaultAttributeMapper.java:74) at org.springframework.webflow.engine.Flow.start(Flow.java:554) at org.springframework.webflow.engine.impl.RequestControlContextImpl.start(RequestControlContextImpl.java:195) at org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:189) at org.springframework.webflow.executor.FlowExecutorImpl.launch(FlowExecutorImpl.java:206) at org.springframework.webflow.executor.support.FlowRequestHandler.handleFlowRequest(FlowRequestHandler.java:131) at org.springframework.webflow.executor.mvc.FlowController.handleRequestInternal(FlowController.java:170) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:819) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:754) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:399) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:354) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:613) That's not very contextual. What flow was it? What input mapping? -- this happened on flow startup, but it's not obvious.
    via by Keith Donald,
  • Consider this exception that throws when a required input mapping is not provided: SEVERE: Servlet.service() for servlet accounts threw exception org.springframework.binding.mapping.RequiredMappingException: This mapping is required; evaluation of expression 'id' against source of type [class org.springframework.webflow.core.collection.LocalAttributeMap] must return a non-null value at org.springframework.binding.mapping.Mapping.map(Mapping.java:99) at org.springframework.binding.mapping.DefaultAttributeMapper.map(DefaultAttributeMapper.java:74) at org.springframework.webflow.engine.Flow.start(Flow.java:554) at org.springframework.webflow.engine.impl.RequestControlContextImpl.start(RequestControlContextImpl.java:195) at org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:189) at org.springframework.webflow.executor.FlowExecutorImpl.launch(FlowExecutorImpl.java:206) at org.springframework.webflow.executor.support.FlowRequestHandler.handleFlowRequest(FlowRequestHandler.java:131) at org.springframework.webflow.executor.mvc.FlowController.handleRequestInternal(FlowController.java:170) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:819) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:754) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:399) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:354) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:613) That's not very contextual. What flow was it? What input mapping? -- this happened on flow startup, but it's not obvious.
    via by Keith Donald,
    • org.springframework.binding.mapping.RequiredMappingException: This mapping is required; evaluation of expression 'id' against source of type [class org.springframework.webflow.core.collection.LocalAttributeMap] must return a non-null value at org.springframework.binding.mapping.Mapping.map(Mapping.java:99) at org.springframework.binding.mapping.DefaultAttributeMapper.map(DefaultAttributeMapper.java:74) at org.springframework.webflow.engine.Flow.start(Flow.java:554) at org.springframework.webflow.engine.impl.RequestControlContextImpl.start(RequestControlContextImpl.java:195) at org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:189) at org.springframework.webflow.executor.FlowExecutorImpl.launch(FlowExecutorImpl.java:206) at org.springframework.webflow.executor.support.FlowRequestHandler.handleFlowRequest(FlowRequestHandler.java:131) at org.springframework.webflow.executor.mvc.FlowController.handleRequestInternal(FlowController.java:170) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:819) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:754) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:399) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:354) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:613)
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