我陷入了一个问题，因为我们不能让应用程序在生产中生效。此问题永远不会出现在开发环境中。它来自我们项目客户的QA环境。
这是一个随机问题，一周一次或两次。大多数时候，当没有用户在QA中访问应用程序时，它会在周末或空闲时间出现。但是，在我们的应用程序中，有一个单独的线程继续运行24 X 7并且它继续与数据库交互，并且在交互到数据库期间的大部分时间我们得到了连接关闭的例外。
由于此交互处于循环中并且线程以24 x 7运行，因此异常会继续，并且日志文件会继续增加。以GB为单位生成的日志文件大小。最终wildfly服务器停止响应。之后我们需要重新启动widfly服务器。
我们正在从Java 6迁移到Java 8＆amp; Jboss 4.2 @到wildfly 8.0.0，也从MSSQL server 2005迁移到2008.当我查看wildfly管理控制台中的连接数时，它显示为ex。可用计数20，活动计数5＆amp;最大使用5.所以，我认为或似乎连接在池中可用。
下面是wildfly中的Java代码，persistence.xml，datasource配置和异常堆栈跟踪。
1）Java代码： -
//@Service bean is the custom annotation for looking EJB stateless session bean
@ServiceBean(Lookup="CloseOutSchedulerService")
private CloseOutSchedulerRemote dao;
public void run() {
ServiceInjector.inject(this);
while(this.executionStatus){
try {
List<ApplicationBranch> appBranchesForAutoCloseOut =new ArrayList<ApplicationBranch>();
ApplicationEventTracker event=null;
int columnCount=TaskBoard.getRowsCount(boardName);
inner: for(int i=0;i<columnCount; i++){
ApplicationBranch branchId=(ApplicationBranch) TaskBoard.getCell(boardName, "Branch", i);
branchId=dao.getApplicationBranch(branchId.getBranchId());
2）的persistence.xml
<persistence version="2.1"
xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="EJBModule3PU" >
<jta-data-source>java:/EMSDB</jta-data-source>
<properties>
<!-- Properties for Hibernate -->
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.id.new_generator_mappings" value="false"/>
</properties>
</persistence-unit>
</persistence>
3）wildfly中的数据源配置： -
<datasource jndi-name="java:/EMSDB" pool-name="EMSDB" enabled="true" use-java-context="true">
<connection-url>jdbc:sqlserver://emsqafnb:1433;databaseName=wealth_ems;</connection-url>
<driver>sqlserver</driver>
<pool>
<min-pool-size>5</min-pool-size>
<max-pool-size>20</max-pool-size>
</pool>
<security>
<user-name>emsmaster1</user-name>
<password>ems@master</password>
</security>
<timeout>
<idle-timeout-minutes>5</idle-timeout-minutes>
</timeout>
</datasource>
4）异常堆栈跟踪： -
2015-06-25 00:16:58,326 INFO [org.hibernate.event.internal.DefaultLoadEventListener] (Thread-115) HHH000327: Error performing load command : org.hibernate.exception.GenericJDBCException: could not prepare statement
2015-06-25 00:16:58,326 ERROR [org.jboss.as.ejb3.invocation] (Thread-115) JBAS014134: EJB Invocation failed on component CloseOutSchedulerService for method public abstract com.fnb.ems.models.ApplicationBranch com.fnb.ems.services.CloseOutSchedulerRemote.getApplicationBranch(java.lang.Integer): javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not prepare statement
at org.jboss.as.ejb3.tx.CMTTxInterceptor.handleExceptionInOurTx(CMTTxInterceptor.java:190) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:275) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:340) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:239) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.remote.EJBRemoteTransactionPropagatingInterceptor.processInvocation(EJBRemoteTransactionPropagatingInterceptor.java:79) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:43) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:95) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:59) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:55) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.ContextClassLoaderInterceptor.processInvocation(ContextClassLoaderInterceptor.java:64)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:326)
at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:448)
at org.jboss.invocation.AccessCheckingInterceptor.processInvocation(AccessCheckingInterceptor.java:61)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:326)
at org.jboss.invocation.PrivilegedWithCombinerInterceptor.processInvocation(PrivilegedWithCombinerInterceptor.java:80)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:185)
at org.jboss.as.ejb3.remote.LocalEjbReceiver.processInvocation(LocalEjbReceiver.java:243) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:181) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.EJBObjectInterceptor.handleInvocation(EJBObjectInterceptor.java:58) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:183) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.EJBHomeInterceptor.handleInvocation(EJBHomeInterceptor.java:83) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:183) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.TransactionInterceptor.handleInvocation(TransactionInterceptor.java:42) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:183) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.ReceiverInterceptor.handleInvocation(ReceiverInterceptor.java:125) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:183) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.EJBInvocationHandler.sendRequestWithPossibleRetries(EJBInvocationHandler.java:253) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:198) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:181) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:144) [jboss-ejb-client-2.0.0.Final.jar:2.0.0.Final]
at com.sun.proxy.$Proxy96.getApplicationBranch(Unknown Source)
at com.fnb.ems.common.CloseoutScheduleService$closeoutExecutor.run(CloseoutScheduleService.java:183)
at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_40]
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not prepare statement
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1763) [hibernate-entitymanager-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1694) [hibernate-entitymanager-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:1141) [hibernate-entitymanager-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:1068) [hibernate-entitymanager-4.3.1.Final.jar:4.3.1.Final]
at org.jboss.as.jpa.container.AbstractEntityManager.find(AbstractEntityManager.java:199) [wildfly-jpa-8.0.0.Final.jar:8.0.0.Final]
at com.fnb.ems.servicebeans.CloseOutSchedulerBean.getApplicationBranch(CloseOutSchedulerBean.java:129) [wealth_fnt_ems_ejb.jar:]
at sun.reflect.GeneratedMethodAccessor31.invoke(Unknown Source) [:1.8.0_40]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_40]
at java.lang.reflect.Method.invoke(Method.java:497) [rt.jar:1.8.0_40]
at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:407)
at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:82) [wildfly-weld-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93) [wildfly-weld-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47) [wildfly-jpa-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:407)
at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:55) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83) [wildfly-weld-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45) [wildfly-ee-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:53)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.component.interceptors.NonPooledEJBComponentInstanceAssociatingInterceptor.processInvocation(NonPooledEJBComponentInstanceAssociatingInterceptor.java:59) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:273) [wildfly-ejb3-8.0.0.Final.jar:8.0.0.Final]
... 47 more
Caused by: org.hibernate.exception.GenericJDBCException: could not prepare statement
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:196) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:160) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.prepareQueryStatement(AbstractLoadPlanBasedLoader.java:257) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeQueryStatement(AbstractLoadPlanBasedLoader.java:201) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:137) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:102) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.loader.entity.plan.AbstractLoadPlanBasedEntityLoader.load(AbstractLoadPlanBasedEntityLoader.java:186) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:4120) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:502) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:467) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:212) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:274) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:150) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1066) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.internal.SessionImpl.access$2000(SessionImpl.java:176) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.load(SessionImpl.java:2540) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.internal.SessionImpl.get(SessionImpl.java:951) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:1110) [hibernate-entitymanager-4.3.1.Final.jar:4.3.1.Final]
... 84 more
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: The connection is closed.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:190)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.checkClosed(SQLServerConnection.java:389)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.prepareStatement(SQLServerConnection.java:2175)
at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.doPrepareStatement(BaseWrapperManagedConnection.java:745)
at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.prepareStatement(BaseWrapperManagedConnection.java:731)
at org.jboss.jca.adapters.jdbc.WrappedConnection.prepareStatement(WrappedConnection.java:405)
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:162) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:186) [hibernate-core-4.3.1.Final.jar:4.3.1.Final]
... 101 more
答案 0 :(得分：0)
我已经在另一个SO线程中回答了这个问题，但是我将在同一位置发布相同的答案。
This Link解释了问题并提供了一个好的解决方案。
目前，由于默认设置或显式配置的空闲超时设置，您的数据库或应用程序服务器（例如JBoss）连接池管理器已使某些连接无效，同时，hibernate的内部数据库连接池管理器将这些连接作为有效连接。因此，当您的应用程序尝试重用它们时，您会收到连接关闭错误，直到重新启动应用程序服务器后，该错误才会清除。
要解决此问题，只需将休眠连接池管理委派给名为hibernate-c3p0的帮助程序库，并遵循示例配置，例如
<property name="hibernate.c3p0.min_size" value="5" />
<property name="hibernate.c3p0.max_size" value="20" />
<property name="hibernate.c3p0.timeout" value="300" />
这些属性在上面的链接以及here
中都有很好的解释。