Java 第一次登录：HTTP状态500-请求处理失败；嵌套异常为org.springframework.transaction.CannotCreateTransactionException

我用Spring、Hibernate和MySQL制作了一个JavaWebApp。它运行正常，但在第一次尝试连接时，出现以下错误：

HTTP Status 500 - Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionException: JDBC begin failed:

type Exception report

message Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionException: JDBC begin failed:

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionException: JDBC begin failed: 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:656)
    org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause

org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionException: JDBC begin failed: 
    org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:596)
    org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
    org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:317)
    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    $Proxy31.getTodosUsuariosList(Unknown Source)
    com.companyname.springapp.service.SimpleAnonimoManager.identificarse(SimpleAnonimoManager.java:21)
    com.companyname.springapp.web.IdentificarseFormController.onSubmit(IdentificarseFormController.java:40)
    sun.reflect.GeneratedMethodAccessor88.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:597)
    org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:174)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:421)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:409)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
    org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause

org.hibernate.TransactionException: JDBC begin failed: 
    org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:96)
    org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1463)
    org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:555)
    org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
    org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:317)
    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    $Proxy31.getTodosUsuariosList(Unknown Source)
    com.companyname.springapp.service.SimpleAnonimoManager.identificarse(SimpleAnonimoManager.java:21)
    com.companyname.springapp.web.IdentificarseFormController.onSubmit(IdentificarseFormController.java:40)
    sun.reflect.GeneratedMethodAccessor88.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:597)
    org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:174)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:421)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:409)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
    org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 4,665,488 milliseconds ago.  The last packet sent successfully to the server was 0 milliseconds ago.
    sun.reflect.GeneratedConstructorAccessor139.newInstance(Unknown Source)
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
    com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121)
    com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3670)
    com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3559)
    com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4110)
    com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2570)
    com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2731)
    com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2809)
    com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:5333)
    org.apache.commons.dbcp.DelegatingConnection.setAutoCommit(DelegatingConnection.java:331)
    org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setAutoCommit(PoolingDataSource.java:317)
    org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:91)
    org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1463)
    org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:555)
    org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
    org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:317)
    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    $Proxy31.getTodosUsuariosList(Unknown Source)
    com.companyname.springapp.service.SimpleAnonimoManager.identificarse(SimpleAnonimoManager.java:21)
    com.companyname.springapp.web.IdentificarseFormController.onSubmit(IdentificarseFormController.java:40)
    sun.reflect.GeneratedMethodAccessor88.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:597)
    org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:174)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:421)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:409)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
    org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause

java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
    com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3119)
    com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3570)
    com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3559)
    com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4110)
    com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2570)
    com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2731)
    com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2809)
    com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:5333)
    org.apache.commons.dbcp.DelegatingConnection.setAutoCommit(DelegatingConnection.java:331)
    org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setAutoCommit(PoolingDataSource.java:317)
    org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:91)
    org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1463)
    org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:555)
    org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
    org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:317)
    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    $Proxy31.getTodosUsuariosList(Unknown Source)
    com.companyname.springapp.service.SimpleAnonimoManager.identificarse(SimpleAnonimoManager.java:21)
    com.companyname.springapp.web.IdentificarseFormController.onSubmit(IdentificarseFormController.java:40)
    sun.reflect.GeneratedMethodAccessor88.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:597)
    org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:174)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:421)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:409)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
    org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.32 logs.

Apache Tomcat/7.0.32

它只在第一次尝试时发生。如果我重新加载页面或再次尝试识别，它将正常运行

我在互联网上搜索了很多可能的解决方案，我尝试了其中一些，但还没有运行。昨天我尝试了一个似乎正确的解决方案，当我上传它时，它运行良好，但今天错误再次出现，所以我不知道我该怎么做

这些是我的配置文件：

jdbc.properties

hibernate.generate_statistics = true
hibernate.show_sql = true

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/database
jdbc.username=user
jdbc.password=pass
hibernate.dialect=org.hibernate.dialect.MySQLDialect
hibernate.format_sql=true
hibernate.hbm2ddl.auto=update
hibernate.current_session_context_class=thread

hibernate.cfg.xml

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <mapping class="com.companyname.springapp.domain.Contrato" />
        <mapping class="com.companyname.springapp.domain.ContratoDraftInicial" />
        <mapping class="com.companyname.springapp.domain.Derecho" />
        <mapping class="com.companyname.springapp.domain.Equipo" />
        <mapping class="com.companyname.springapp.domain.EstadisticaEquipo" />
        <mapping class="com.companyname.springapp.domain.EstadisticaJugador" />
        <mapping class="com.companyname.springapp.domain.Jugador" />
        <mapping class="com.companyname.springapp.domain.Usuario" />
    </session-factory>

</hibernate-configuration>

---

知道为什么会发生这种情况吗？

看来MySQL或防火墙正在清除长时间挂在jdbc连接池中的非活动连接：

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure 
The last packet successfully received from the server was 4,665,488 milliseconds ago.

检查MySQL上的值

您可以使用validationQuery、testOnBorrow和testWhileIdle等工具

“皮带和支架”的混淆，可能会以牺牲性能为代价来解决您的问题：

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
  <property name="driverClassName" value="${jdbc.driverClassName}"/>
  <property name="url" value="${jdbc.url}"/>
  <property name="username" value="${jdbc.username}"/>
  <property name="password" value="${jdbc.password}"/>
  <property name="validationQuery" value="SELECT 1"/>
  <property name="testOnBorrow" value="true"/>
</bean>

---

上述内容将在您每次从池中借用时测试连接。

MySQL或防火墙似乎正在清除您在jdbc连接池中长期存在的非活动连接：

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure 
The last packet successfully received from the server was 4,665,488 milliseconds ago.

检查MySQL上的值

您可以使用validationQuery、testOnBorrow和testWhileIdle等工具

“皮带和支架”的混淆，可能会以牺牲性能为代价来解决您的问题：

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
  <property name="driverClassName" value="${jdbc.driverClassName}"/>
  <property name="url" value="${jdbc.url}"/>
  <property name="username" value="${jdbc.username}"/>
  <property name="password" value="${jdbc.password}"/>
  <property name="validationQuery" value="SELECT 1"/>
  <property name="testOnBorrow" value="true"/>
</bean>

---

上述内容将在您每次从池中借钱时测试连接。

我把这句话放在您说的地方。我试着进去，第一次就进去了。但也许明天我会确定这是否是正确的解决方案，如果我能在第一时间再次进入。谢谢！：）好啊2天后，它可以正常运行。这就是问题所在。谢谢：）我把这个放在你说的地方。我试着进去，第一次就进去了。但也许明天我会确定这是否是正确的解决方案，如果我能在第一时间再次进入。谢谢！：）好啊2天后，它可以正常运行。这就是问题所在。谢谢：）

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure 
The last packet successfully received from the server was 4,665,488 milliseconds ago.

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
  <property name="driverClassName" value="${jdbc.driverClassName}"/>
  <property name="url" value="${jdbc.url}"/>
  <property name="username" value="${jdbc.username}"/>
  <property name="password" value="${jdbc.password}"/>
  <property name="validationQuery" value="SELECT 1"/>
  <property name="testOnBorrow" value="true"/>
</bean>