我在使用 Glassfish 3.1.2 + JPA + EclipseLink + MySQL 开发的应用程序上遇到问题，在我部署应用程序后（数据库上没有表）它运行得很好并且显然执行了唯一的查询（计算表中的实体）我进入的。但是如果我重新加载页面，再次调用 servlet 会导致抛出异常：TransactionRolledbackLocalException
显然在用于计算实体的相同方法上。
然后如果我再次重新加载，它运行得很好，然后再次出现异常，很好，异常等等......
这是我的小服务程序：
@WebServlet(name="Controller", urlPatterns={"/Controller"})
public class Controller extends HttpServlet {
private static final long serialVersionUID = 1L;
@EJB WineDao _wines;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
_wines.countWines();
RequestDispatcher view = request.getRequestDispatcher("ShowAll.jsp");
view.forward(request, response);
}
}
这是酒道：
@Stateless
public class WineDao {
@PersistenceContext private EntityManager em;
public Long countWines() {
CriteriaBuilder qb = em.getCriteriaBuilder();
CriteriaQuery<Long> cq = qb.createQuery(Long.class);
cq.select(qb.count(cq.from(Wine.class)));
return em.createQuery(cq).getSingleResult();
}
}
持久性.xml：
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="myPU" transaction-type="JTA">
<jta-data-source>jdbc/MySQLDataSource</jta-data-source>
<properties>
<!-- drop and create tables at deployment -->
<property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
<!-- log sqls executed in server.log -->
<property name="eclipselink.logging.level" value="FINE"/>
<!-- Instruct EclipseLink to not log execeptions it throws. Lets the application decide about it-->
<property name="eclipselink.logging.exceptions" value="true"/>
</properties>
</persistence-unit>
</persistence>
最后是服务器日志，当我没有错误时：
[#|2013-01-07T18:32:27.271+0100|FINE|glassfish3.1.2|org.eclipse.persistence.session.file:/opt/glassfish/glassfish/domains/domain1/applications/appname/WEB-INF/classes/_myPU.sql|_ThreadID=21;_ThreadName=Thread-2;ClassName=null;MethodName=null;|SELECT COUNT(ID) FROM Wine|#]
当我收到错误消息时：
[#|2013-01-07T18:32:29.582+0100|WARNING|glassfish3.1.2|javax.enterprise.system.container.ejb.com.sun.ejb.containers|_ThreadID=20;_ThreadName=Thread-2;|EJB5184:A system exception occurred during an invocation on EJB WineDao, method: public java.lang.Long it.vitux.java.appname.dao.WineDao.countWines()|#]
[#|2013-01-07T18:32:29.583+0100|WARNING|glassfish3.1.2|javax.enterprise.system.container.ejb.com.sun.ejb.containers|_ThreadID=20;_ThreadName=Thread-2;|javax.ejb.TransactionRolledbackLocalException: Client's transaction aborted
at com.sun.ejb.containers.BaseContainer.useClientTx(BaseContainer.java:4722)
at com.sun.ejb.containers.BaseContainer.preInvokeTx(BaseContainer.java:4601)
at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:1914)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:212)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88)
at $Proxy516.countWines(Unknown Source)
at it.vitux.java.appname.dao.__EJB31_Generated__WineDao__Intf____Bean__.countWines(Unknown Source)
at it.vitux.java.appname.controllers.Controller.doGet(Controller.java:43)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
at com.sun.grizzly.http.ajp.AjpProcessorTask.invokeAdapter(AjpProcessorTask.java:125)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:679)
|#]
[#|2013-01-07T18:32:29.591+0100|WARNING|glassfish3.1.2|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=20;_ThreadName=Thread-2;|StandardWrapperValve[Controller]: PWC1406: Servlet.service() for servlet Controller threw exception
javax.ejb.EJBTransactionRolledbackException
at com.sun.ejb.containers.BaseContainer.mapLocal3xException(BaseContainer.java:2314)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2096)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1994)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88)
at $Proxy516.countWines(Unknown Source)
at it.vitux.java.appname.dao.__EJB31_Generated__WineDao__Intf____Bean__.countWines(Unknown Source)
at it.vitux.java.appname.controllers.Controller.doGet(Controller.java:43)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
at com.sun.grizzly.http.ajp.AjpProcessorTask.invokeAdapter(AjpProcessorTask.java:125)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:679)
Caused by: javax.ejb.TransactionRolledbackLocalException: Client's transaction aborted
at com.sun.ejb.containers.BaseContainer.useClientTx(BaseContainer.java:4722)
at com.sun.ejb.containers.BaseContainer.preInvokeTx(BaseContainer.java:4601)
at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:1914)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:212)
... 31 more
|#]
忘记了 Wine 课程：
@Entity
public class Wine {
public static final int UP_ADDED = 0;
public static final int UP_REMOVED = 1;
public static final int UP_PRICE = 2;
public static final int UP_OFFER = 3;
@Id Long id;
private String name;
private BigDecimal price;
private BigDecimal offer;
@Temporal(TemporalType.TIMESTAMP)
private Date updateTime;
private int updateStatus = 0;
// Getters + Setters
}