我们的应用程序使用JBPM来处理工作流，但由于一些问题，我们遇到了许多事务问题，这使我们的应用软件无法使用。这种情况并不总是发生，我们也无法确切找出造成这种情况的原因。我们已经尝试同步调用方法，以便在任何给定的时间只有一个线程在上面工作，但这也没有帮助。当涉及到与JTA和hibernate的事务时，我们缺少什么吗？
它被部署为自己的容器，并且只能通过其顶部的restful接口访问
我们正在使用jbpm 5.4.0堆栈跟踪：
java.lang.RuntimeException: Could not commit transaction
at org.jbpm.task.service.TaskServiceSession.doOperationInTransaction(TaskServiceSession.java:1130)
at org.jbpm.task.service.TaskServiceSession.getEntity(TaskServiceSession.java:1069)
at org.jbpm.task.service.TaskServiceSession.getTask(TaskServiceSession.java:605)
at com.jpmc.rdt.captisflow.service.impl.CaptisLocalTaskService.getTask(CaptisLocalTaskService.java:153)
at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.handleCompletedTask(GenericHTWorkItemHandler.java:251)
at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.execute(GenericHTWorkItemHandler.java:234)
at com.jpmc.rdt.captisflow.service.impl.CaptisLocalTaskService$SimpleEventTransport.trigger(CaptisLocalTaskService.java:325)
at org.jbpm.task.event.MessagingTaskEventListener.triggerPayload(MessagingTaskEventListener.java:76)
at org.jbpm.task.event.MessagingTaskEventListener.handleEvent(MessagingTaskEventListener.java:92)
at org.jbpm.task.event.MessagingTaskEventListener.taskCompleted(MessagingTaskEventListener.java:109)
at org.jbpm.task.event.TaskEventSupport.fireTaskCompleted(TaskEventSupport.java:49)
at org.jbpm.task.service.TaskServiceSession.postTaskCompleteOperation(TaskServiceSession.java:569)
at org.jbpm.task.service.TaskServiceSession.taskOperation(TaskServiceSession.java:495)
at com.jpmc.rdt.captisflow.service.impl.CaptisLocalTaskService.complete(CaptisLocalTaskService.java:79)
at com.jpmc.rdt.captisflow.service.impl.WorkflowServiceImpl.completeTask(WorkflowServiceImpl.java:388)
at com.jpmc.rdt.captisflow.service.impl.WorkflowServiceImpl.process(WorkflowServiceImpl.java:143)
at com.jpmc.rdt.captisflow.controller.WorkflowController.process(WorkflowController.java:83)
at sun.reflect.GeneratedMethodAccessor93.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
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:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:685)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:919)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:851)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:855)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:205)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.ha.session.JvmRouteBinderValve.invoke(JvmRouteBinderValve.java:219)
at org.apache.catalina.ha.tcp.ReplicationValve.invoke(ReplicationValve.java:333)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.StuckThreadDetectionValve.invoke(StuckThreadDetectionValve.java:193)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java:197)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.RuntimeException: Unable to rollback transaction
at org.jbpm.task.service.persistence.TaskLocalTransactionManager.rollback(TaskLocalTransactionManager.java:77)
at org.jbpm.task.service.persistence.TaskPersistenceManager.endTransaction(TaskPersistenceManager.java:110)
at org.jbpm.task.service.TaskServiceSession.doOperationInTransaction(TaskServiceSession.java:1118)
... 50 more
Caused by: java.lang.IllegalStateException: Transaction not active
at org.hibernate.ejb.TransactionImpl.rollback(TransactionImpl.java:101)
at org.jbpm.task.service.persistence.TaskLocalTransactionManager.rollback(TaskLocalTransactionManager.java:70)
... 52 more
这一切都取决于你对框架做了什么，例如：com.jpmc.rdt.kittsflow.service.impl.WorkflowServiceImpl.completeTask（WorkflowServiceImpl.java:388）。这是在做什么？我想您可能在与任务服务的交互过程中混淆了一些东西。你确定没有两个方法同时调用任务顶部的一个操作吗？当你说异常会使应用程序不可用时，为什么会这样？您是否将此异常传播给用户？大多数情况下，如果出现并发问题，一个操作将成功，另一个操作则失败，迫使您重试所有失败的操作。