flowable报错FlowableTaskAlreadyClaimedException问题

执行节点报错:Task '1267760912744316930' is already claimed by someone else.是说这个节点已经被别人执行了.

具体报错信息如下:

2020-06-02 18:35:46 CST ERROR org.flowable.engine.FlowableTaskAlreadyClaimedException: Task '1267760912744316930' is already claimed by someone else.at org.flowable.engine.impl.cmd.ClaimTaskCmd.execute(ClaimTaskCmd.java:53) ~[flowable-engine-6.4.1.jar!/:6.4.1]at org.flowable.engine.impl.cmd.ClaimTaskCmd.execute(ClaimTaskCmd.java:27) ~[flowable-engine-6.4.1.jar!/:6.4.1]at org.flowable.engine.impl.cmd.NeedsActiveTaskCmd.execute(NeedsActiveTaskCmd.java:58) ~[flowable-engine-6.4.1.jar!/:6.4.1]at org.flowable.engine.impl.interceptor.CommandInvoker$1.run(CommandInvoker.java:51) ~[flowable-engine-6.4.1.jar!/:6.4.1]at org.flowable.engine.impl.interceptor.CommandInvoker.executeOperation(CommandInvoker.java:93) ~[flowable-engine-6.4.1.jar!/:6.4.1]at org.flowable.engine.impl.interceptor.CommandInvoker.executeOperations(CommandInvoker.java:72) ~[flowable-engine-6.4.1.jar!/:6.4.1]at org.flowable.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:56) ~[flowable-engine-6.4.1.jar!/:6.4.1]at org.flowable.engine.impl.interceptor.BpmnOverrideContextInterceptor.execute(BpmnOverrideContextInterceptor.java:25) ~[flowable-engine-6.4.1.jar!/:6.4.1]at org.flowable.common.engine.impl.interceptor.TransactionContextInterceptor.execute(TransactionContextInterceptor.java:53) ~[flowable-engine-common-6.4.1.jar!/:6.4.1]at org.flowable.common.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:71) ~[flowable-engine-common-6.4.1.jar!/:6.4.1]at org.flowable.common.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:49) ~[flowable-spring-common-6.4.1.jar!/:6.4.1]at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133) ~[spring-tx-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.flowable.common.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:46) ~[flowable-spring-common-6.4.1.jar!/:6.4.1]at org.flowable.common.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:30) ~[flowable-engine-common-6.4.1.jar!/:6.4.1]at org.flowable.common.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:56) ~[flowable-engine-common-6.4.1.jar!/:6.4.1]at org.flowable.common.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:51) ~[flowable-engine-common-6.4.1.jar!/:6.4.1]at org.flowable.engine.impl.TaskServiceImpl.claim(TaskServiceImpl.java:198) ~[flowable-engine-6.4.1.jar!/:6.4.1]at com.ayg.workflow.service.flowable.ProcessInstanceService.claim(ProcessInstanceService.java:272) ~[classes!/:?]at com.ayg.workflow.service.flowable.ProcessInstanceService$$FastClassBySpringCGLIB$$f167a7fb.invoke(<generated>) ~[classes!/:?]at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738) ~[spring-aop-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282) ~[spring-tx-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673) ~[spring-aop-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at com.ayg.workflow.service.flowable.ProcessInstanceService$$EnhancerBySpringCGLIB$$c0342e7.claim(<generated>) ~[classes!/:?]at com.ayg.workflow.component.WorkFlowTaskOperateComponent.processWorkFlowTask(WorkFlowTaskOperateComponent.java:188) ~[classes!/:?]at com.ayg.workflow.component.WorkFlowTaskOperateComponent.processWorkFlowTaskSyncCallback(WorkFlowTaskOperateComponent.java:792) ~[classes!/:?]at com.ayg.workflow.component.WorkFlowTaskOperateComponent$$FastClassBySpringCGLIB$$597e9d1.invoke(<generated>) ~[classes!/:?]at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:669) ~[spring-aop-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at com.ayg.workflow.component.WorkFlowTaskOperateComponent$$EnhancerBySpringCGLIB$$4848de29.processWorkFlowTaskSyncCallback(<generated>) ~[classes!/:?]at com.ayg.workflow.controller.flowable.ProcessOperateController.executeProcessSyncCallback(ProcessOperateController.java:73) ~[classes!/:?]at sun.reflect.GeneratedMethodAccessor1782.invoke(Unknown Source) ~[?:?]at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_131]at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_131]at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) [spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) [spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) [spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55) [spring-boot-1.5.6.RELEASE.jar!/:1.5.6.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110) [spring-boot-actuator-1.5.6.RELEASE.jar!/:1.5.6.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at com.aygframework.log.CallChainServerLogForSpringMVCFilter.doFilterInternal(CallChainServerLogForSpringMVCFilter.java:169) [ayg-log-1.2.8-SNAPSHOT.jar!/:1.2.8-SNAPSHOT]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106) [spring-boot-actuator-1.5.6.RELEASE.jar!/:1.5.6.RELEASE]at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_131]at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_131]at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.16.jar!/:8.5.16]at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]

报错信息中可以看到用的是ClaimTaskCmd命令.我把源码贴一下

@Override
protected Void execute(CommandContext commandContext, TaskEntity task) {if (Flowable5Util.isFlowable5ProcessDefinitionId(commandContext, task.getProcessDefinitionId())) {Flowable5CompatibilityHandler compatibilityHandler = Flowable5Util.getFlowable5CompatibilityHandler();compatibilityHandler.claimTask(taskId, userId);return null;}if (userId != null) {task.setClaimTime(CommandContextUtil.getProcessEngineConfiguration(commandContext).getClock().getCurrentTime());if (task.getAssignee() != null) {if (!task.getAssignee().equals(userId)) {// When the task is already claimed by another user, throw// exception. Otherwise, ignore this, post-conditions of method already met.throw new FlowableTaskAlreadyClaimedException(task.getId(), task.getAssignee());}CommandContextUtil.getActivityInstanceEntityManager(commandContext).recordTaskInfoChange(task);} else {TaskHelper.changeTaskAssignee(task, userId);}CommandContextUtil.getHistoryManager().createUserIdentityLinkComment(task, userId, IdentityLinkType.ASSIGNEE, true);} else {if (task.getAssignee() != null) {// Task claim time should be nulltask.setClaimTime(null);String oldAssigneeId = task.getAssignee();// Task should be assigned to no oneTaskHelper.changeTaskAssignee(task, null);CommandContextUtil.getHistoryManager().createUserIdentityLinkComment(task, oldAssigneeId, IdentityLinkType.ASSIGNEE, true, true);}}return null;}

会检查task的Assignee是不是都等于当前userId.如果不等于就会报错已经被别人签收了.

if (!task.getAssignee().equals(userId)) {
// When the task is already claimed by another user, throw
// exception. Otherwise, ignore this, post-conditions of method already met.
throw new FlowableTaskAlreadyClaimedException(task.getId(), task.getAssignee());
}

这个时候检查一下代码的逻辑,可能是之前别人执行了节点中途中断了,事务没有回滚.

如果排除了事务没有回滚,那么检查流程图是否有问题.

下面有一句copy来的话:

taskService.setAssignee（taskId,userId）与 taskService.claim（taskId,userId）区别：
1、setAssignee直接改变act_ru_task表中的task的Assignee，指派人非null时添加一条新纪录在act_hi_identitylink表中。
2、claim先查询任务是否被申领（即act_ru_task表中的Assignee是否为空），为空则与setAssignee相同；不为空报错误org.activiti.engine.ActivitiTaskAlreadyClaimedException: Task is already claimed by someone else.

参考自:任务分配

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