分享文章时500错误

Bắt đầu từ com.zhy.xueandroid.controller.UserArticleController.add trong UserArticleController.java:176 và theo dõi transaction addUserArticleForUser. Kiểm tra cách entity Coin được tạo hoặc persist trước Hibernate flush, sau đó tái hiện việc chia sẻ bài viết bằng request path hiện có. Công việc được hoàn tất khi việc chia sẻ không còn trả về lỗi 500 và không thể tái hiện lỗi null-id.

exception:

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.AssertionFailure: null id in com.zhy.xueandroid.bean.Coin entry (don't flush the Session after an exception occurs)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	com.zhy.xueandroid.web.xss.XssFilter.doFilter(XssFilter.java:33)
	com.zhy.xueandroid.web.SystemContextFilter.doFilter(SystemContextFilter.java:23)
	org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

root cause:

org.hibernate.AssertionFailure: null id in com.zhy.xueandroid.bean.Coin entry (don't flush the Session after an exception occurs)
	org.hibernate.event.def.DefaultFlushEntityEventListener.checkId(DefaultFlushEntityEventListener.java:82)
	org.hibernate.event.def.DefaultFlushEntityEventListener.getValues(DefaultFlushEntityEventListener.java:190)
	org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:147)
	org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:219)
	org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:99)
	org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)
	org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216)
	org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383)
	org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133)
	org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:656)
	org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
	org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
	org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:392)
	org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120)
	org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90)
	org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
	com.sun.proxy.$Proxy209.addUserArticleForUser(Unknown Source)
	com.zhy.xueandroid.controller.UserArticleController.add(UserArticleController.java:176)
	sun.reflect.GeneratedMethodAccessor1816.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:100)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:604)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:565)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	com.zhy.xueandroid.web.xss.XssFilter.doFilter(XssFilter.java:33)
	com.zhy.xueandroid.web.SystemContextFilter.doFilter(SystemContextFilter.java:23)
	org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

注：该问题非必现，我再次尝试分享文章的时候就成功了