Java @第一次执行后构造失败

因为我是新使用JavaEE7的人，所以我创建了一个项目只是为了学习。 我创建了一个请求范围如下的CDIBean（它只是实现了Serializable，因为我尝试将它与@javax.faces.view.ViewScoped一起使用）

以上内容显示在浏览器上，以下内容显示在server.log上：

Caused by: org.hibernate.exception.GenericJDBCException: Could not open connection
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:235) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.getConnection(LogicalConnectionImpl.java:171) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:63) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:162) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:186) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:160) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1884) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1861) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1838) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.doQuery(Loader.java:909) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:354) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.doList(Loader.java:2553) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.doList(Loader.java:2539) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2369) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.list(Loader.java:2364) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:496) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:387) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:231) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1264) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:573) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:449) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    ... 177 more
Caused by: java.sql.SQLException: javax.resource.ResourceException: IJ000460: Error checking for a transaction
    at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:154)
    at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:380) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:228) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    ... 198 more
Caused by: javax.resource.ResourceException: IJ000460: Error checking for a transaction
    at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:416)
    at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:513)
    at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:146)
    ... 201 more
Caused by: javax.resource.ResourceException: IJ000459: Transaction is not active: tx=TransactionImple < ac, BasicAction: 0:ffffc0a81906:-758bf077:5376ec7d:9 status: ActionStatus.ABORT_ONLY >
    at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:400)
    ... 203 more

是一个EJB。但是，当我刷新相同的URL时，它工作正常。我不知道发生了什么事。此EJB使用

@TransactionAttribute(TransactionAttributeType.REQUIRED)

所以我使用容器管理的事务。我在MySql数据库中使用JPA2.1。 如果没有人给我一个解决方案，至少能解释一下为什么会发生这种情况吗

---

谢谢。

默认情况下，CDIBean没有事务功能。在JTA1.2（EE7的一部分）中，添加了一个事务拦截器，允许将CDIBean标记为事务性的。您可能希望尝试将您的

PostConstruct

方法标记为

@Transactional（TxType.REQUIRED）

修复了在Wildfly数据源中禁用JTA并在persistence.xml中使用RESOURCE-LOCAL transaction的问题。

您认为PostConstruct有什么问题？我看到一个事务错误，可能是一些持久性配置问题。这应该可以帮助您：

Caused by: org.hibernate.exception.GenericJDBCException: Could not open connection
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:235) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.getConnection(LogicalConnectionImpl.java:171) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:63) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:162) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:186) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:160) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1884) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1861) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1838) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.doQuery(Loader.java:909) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:354) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.doList(Loader.java:2553) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.doList(Loader.java:2539) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2369) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.Loader.list(Loader.java:2364) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:496) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:387) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:231) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1264) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:573) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:449) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    ... 177 more
Caused by: java.sql.SQLException: javax.resource.ResourceException: IJ000460: Error checking for a transaction
    at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:154)
    at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:380) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:228) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    ... 198 more
Caused by: javax.resource.ResourceException: IJ000460: Error checking for a transaction
    at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:416)
    at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:513)
    at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:146)
    ... 201 more
Caused by: javax.resource.ResourceException: IJ000459: Transaction is not active: tx=TransactionImple < ac, BasicAction: 0:ffffc0a81906:-758bf077:5376ec7d:9 status: ActionStatus.ABORT_ONLY >
    at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:400)
    ... 203 more

IssueRepositoryFacade

@TransactionAttribute(TransactionAttributeType.REQUIRED)