2.5.1版本snaker发现有最后一步流程走不下去的bug

Question

@Dead_knight 你好，想跟你请教个问题：2.5.1版本snaker发现有最后一步流程走不下去的bug，打出存在主任务的异常。感觉原因是每次走流程时，wf_task在创建新的task时，并没有把旧的task删除。请问这个问题解决了么？

这个问题是概率出现，还没有找到复现规律，可能和多人同时登陆一个用户有关。

Answer 1

这里可能有问题，transitions 只有1个，但是outputs却有2个。

public void parse(Element element) {
model = newModel();
model.setName(element.getAttribute(ATTR_NAME));
model.setDisplayName(element.getAttribute(ATTR_DISPLAYNAME));
model.setLayout(element.getAttribute(ATTR_LAYOUT));
model.setPreInterceptors(element.getAttribute(ATTR_PREINTERCEPTORS));
model.setPostInterceptors(element.getAttribute(ATTR_POSTINTERCEPTORS));

List<Element> transitions = XmlHelper.elements(element, NODE_TRANSITION);
for(Element te : transitions) {
TransitionModel transition = new TransitionModel();
transition.setName(te.getAttribute(ATTR_NAME));
transition.setDisplayName(te.getAttribute(ATTR_DISPLAYNAME));
transition.setTo(te.getAttribute(ATTR_TO));
transition.setExpr(te.getAttribute(ATTR_EXPR));
transition.setG(te.getAttribute(ATTR_G));
transition.setOffset(te.getAttribute(ATTR_OFFSET));
transition.setSource(model);
model.getOutputs().add(transition);
}

parseNode(model, element);
}

Answer 2

目测是最后一个节点与end节点有2根线,snakerflow的流程图上重叠显示,
导致生成2个任务, 用眼看不出来的

Answer 3

@Dead_knight  你好 如下为完整异常

2015-08-27 09:34:42,284 INFO [org.snaker.engine.core.ServiceContext] - put new instance[name=org.snaker.engine.Completion][clazz=org.snaker.engine.impl.GeneralCompletion]

org.snaker.engine.SnakerException: 存在未完成的主办任务,请确认.

at org.snaker.engine.handlers.impl.EndProcessHandler.handle(EndProcessHandler.java:45)

at org.snaker.engine.model.BaseModel.fire(BaseModel.java:47)

at org.snaker.engine.model.EndModel.exec(EndModel.java:35)

at org.snaker.engine.model.NodeModel.execute(NodeModel.java:81)

at org.snaker.engine.model.TransitionModel.execute(TransitionModel.java:72)

at org.snaker.engine.model.NodeModel.runOutTransition(NodeModel.java:92)

at org.snaker.engine.model.TaskModel.exec(TaskModel.java:124)

at org.snaker.engine.model.NodeModel.execute(NodeModel.java:81)

at org.snaker.engine.core.SnakerEngineImpl.executeTask(SnakerEngineImpl.java:306)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)

at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)

at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)

at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:266)

at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)

at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)

at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)

at com.sun.proxy.$Proxy37.executeTask(Unknown Source)

at com.yun.service.WorkOrderService.execute(WorkOrderService.java:76)

at com.yun.control.WorkOrderController.approvalcomment(WorkOrderController.java:420)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:781)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:721)

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)

at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)

at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)

at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:100)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)

at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)

at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)

at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)

at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)

at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)

at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)

at java.lang.Thread.run(Thread.java:744)