org.activiti.engine.ActivitiException: this activity doesn't accept signals at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.signal(FlowNodeActivityBehavior.java:53) at org.activiti.engine.impl.persistence.entity.ExecutionEntity.signal(ExecutionEntity.java:417) at org.activiti.engine.impl.persistence.entity.TaskEntity.complete(TaskEntity.java:203) at org.activiti.engine.impl.cmd.CompleteTaskCmd.execute(CompleteTaskCmd.java:52) at org.activiti.engine.impl.cmd.CompleteTaskCmd.execute(CompleteTaskCmd.java:24) at org.activiti.engine.impl.cmd.NeedsActiveTaskCmd.execute(.java:59) at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24) at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57) at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47) at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:140) at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45) at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31) at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40) at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35) at org.activiti.engine.impl.TaskServiceImpl.complete(TaskServiceImpl.java:182)

流程图如图所示：