Not able to see the image of process instance

[maulee17]

Hi,

I am getting following exception when I try to see my failed process instances in activiti explorer.  This happened for the first time, My previous deployments were working perfectly fine.

Is there a way I can fix this ?

Exception

com.vaadin.event.ListenerMethod$MethodException
Cause: org.activiti.engine.ActivitiException: Error while generating process image
   at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
   at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
   at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1193)
   at com.vaadin.ui.AbstractField.fireValueChange(AbstractField.java:891)
   at com.vaadin.ui.AbstractField.setValue(AbstractField.java:529)
   at com.vaadin.ui.AbstractSelect.setValue(AbstractSelect.java:666)
   at com.vaadin.ui.AbstractSelect.changeVariables(AbstractSelect.java:475)
   at com.vaadin.ui.Table.changeVariables(Table.java:2038)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1299)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1219)
   at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:735)
   at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:296)
   at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
   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:293)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
   at java.lang.Thread.run(Thread.java:662)
Caused by: org.activiti.engine.ActivitiException: Error while generating process image
   at org.activiti.engine.impl.bpmn.diagram.ProcessDiagramCanvas.generateImage(ProcessDiagramCanvas.java:170)
   at org.activiti.engine.impl.bpmn.diagram.ProcessDiagramGenerator.generateDiagram(ProcessDiagramGenerator.java:236)
   at org.activiti.explorer.ui.process.ProcessDefinitionImageStreamResourceBuilder.buildStreamResource(ProcessDefinitionImageStreamResourceBuilder.java:71)
   at org.activiti.explorer.ui.management.process.ProcessInstanceDetailPanel.addProcessImage(ProcessInstanceDetailPanel.java:157)
   at org.activiti.explorer.ui.management.process.ProcessInstanceDetailPanel.init(ProcessInstanceDetailPanel.java:111)
   at org.activiti.explorer.ui.management.process.ProcessInstanceDetailPanel.(ProcessInstanceDetailPanel.java:98)
   at org.activiti.explorer.ui.process.ProcessInstancePage$1.valueChange(ProcessInstancePage.java:60)
   at sun.reflect.GeneratedMethodAccessor308.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:490)


Regards,
Maulee.

[jbarrez]

Is that all the stacktrace there is? I would hope there is a cause for why the generation failed … ?