NullPointerException in SettingsFactory.java:159 -Hibernate 3，Oracle10g，Websphere6.1
NullPointerException in SettingsFactory.java:159 -Hibernate 3，Oracle10g，Websphere6.1
提问于 2013-06-05 13:23:11
我在Websphere ApplicationServer6.1中使用Hibernate 3。我正在使用JNDI连接到我的数据源。我在管理控制台中检查了连接，连接成功。但是，当我在服务器中部署我的项目并使用JNDI连接到数据源时，我会得到下面的错误消息。
Caused by: java.lang.NullPointerException
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:159)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2163)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2159)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1383)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:954)它显示原因:null。
我使用Oracle 10g数据库。
我在日志中看到了更多的异常。这是否与这个问题有关？
00000027 RegisteredRes E WTRN0078E: An attempt by the transaction manager to call start on a transactional resource has resulted in an error. The error code was XAER_RMERR. The exception stack trace follows: oracle.jdbc.xa.OracleXAException
at oracle.jdbc.xa.OracleXAResource.checkError(OracleXAResource.java:1157)
at oracle.jdbc.xa.client.OracleXAResource.start(OracleXAResource.java:295)
at com.ibm.ws.rsadapter.spi.WSRdbXaResourceImpl.start(WSRdbXaResourceImpl.java:1324)
at com.ibm.ejs.j2c.XATransactionWrapper.start(XATransactionWrapper.java:1467)
at com.ibm.ws.Transaction.JTA.JTAResourceBase.start(JTAResourceBase.java:141)
at com.ibm.ws.Transaction.JTA.RegisteredResources.startRes(RegisteredResources.java:1103)
at com.ibm.ws.Transaction.JTA.RegisteredResources.enlistResource(RegisteredResources.java:525)
at com.ibm.ws.Transaction.JTA.TransactionImpl.enlistResource(TransactionImpl.java:3219)
at com.ibm.ws.Transaction.JTA.TranManagerSet.enlist(TranManagerSet.java:396)
at com.ibm.ejs.j2c.XATransactionWrapper.enlist(XATransactionWrapper.java:693)
at com.ibm.ejs.j2c.ConnectionManager.lazyEnlist(ConnectionManager.java:1723)
at com.ibm.ws.rsadapter.spi.WSRdbManagedConnectionImpl.lazyEnlist(WSRdbManagedConnectionImpl.java:2109)
at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.beginTransactionIfNecessary(WSJdbcConnection.java:600)
at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.getMetaData(WSJdbcConnection.java:1533)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:116)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2163)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2159)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1383)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:954)另一个例外是
00000027 XATransaction E J2CA0030E: Method enlist caught javax.transaction.SystemException: XAResource start association error:XAER_RMERR
at com.ibm.ws.Transaction.JTA.RegisteredResources.startRes(RegisteredResources.java:1154)
at com.ibm.ws.Transaction.JTA.RegisteredResources.enlistResource(RegisteredResources.java:525)
at com.ibm.ws.Transaction.JTA.TransactionImpl.enlistResource(TransactionImpl.java:3219)
at com.ibm.ws.Transaction.JTA.TranManagerSet.enlist(TranManagerSet.java:396)
at com.ibm.ejs.j2c.XATransactionWrapper.enlist(XATransactionWrapper.java:693)
at com.ibm.ejs.j2c.ConnectionManager.lazyEnlist(ConnectionManager.java:1723)
at com.ibm.ws.rsadapter.spi.WSRdbManagedConnectionImpl.lazyEnlist(WSRdbManagedConnectionImpl.java:2109)
at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.beginTransactionIfNecessary(WSJdbcConnection.java:600)
at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.getMetaData(WSJdbcConnection.java:1533)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:116)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2163)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2159)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1383)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:954)
Caused by: oracle.jdbc.xa.OracleXAException
at oracle.jdbc.xa.OracleXAResource.checkError(OracleXAResource.java:1157)
at oracle.jdbc.xa.client.OracleXAResource.start(OracleXAResource.java:295)
at com.ibm.ws.rsadapter.spi.WSRdbXaResourceImpl.start(WSRdbXaResourceImpl.java:1324)
at com.ibm.ejs.j2c.XATransactionWrapper.start(XATransactionWrapper.java:1467)
at com.ibm.ws.Transaction.JTA.JTAResourceBase.start(JTAResourceBase.java:141)
at com.ibm.ws.Transaction.JTA.RegisteredResources.startRes(RegisteredResources.java:1103)
while trying to enlist resources from datasource jdbc/OracleData with the Transaction Manager for the current transaction, and threw a ResourceException.下面是我的hibernate配置文件：
<hibernate-configuration>
<session-factory>
<property name="dialect">
org.hibernate.dialect.Oracle10gDialect
</property>
<property name="hibernate.transaction.factory_class">
org.hibernate.transaction.JTATransactionFactory
</property>
<property name="hibernate.transaction.manager_lookup_class">
xxx.xxx.xxx.WebSphereExtendedJTATransactionLookup
</property>
<property name="jta.UserTransaction">
java:comp/UserTransaction
</property>
</session-factory>
</hibernate-configuration>这里，WebSphereExtendedJTATransactionLookup实现了org.hibernate.transaction.TransactionManagerLookup
我就是这样创建会话的
final Configuration configuration = new AnnotationConfiguration();
configuration.setProperty("hibernate.connection.datasource", dataSource);
configuration.setProperty(org.hibernate.cfg.Environment.SHOW_SQL, System.getProperty(SHOW_SQL,"false"));
configuration.configure();
return configuration.buildSessionFactory();Stack Overflow用户
发布于 2013-06-05 14:39:01
不幸的是，如果不查看您的配置文件，我就不能说太多，但是我会尝试的。这个错误似乎是应用程序和JNDI池之间连接配置的问题。
- 确保您的部署描述符(web.xml)包含JNDI连接的配置，例如:您的新DataSource jdbc/mysqlblogpostdataref javax.sql.DataSource容器
- 并查找您的hibernate.cfg(假设您没有使用Spring)来解决配置问题，下面是另一个示例：
<property name="current_session_context_class">thread</property>
<property name="hibernate.bytecode.use_reflection_optimizer">false</property>
<property name="hibernate.connection.datasource">java:comp/env/jdbc/mysqlblogpostdataref</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>另外，确保在您的context.xml文件中验证配置，如这里引用的配置hibernate通过JNDI数据资源连接到数据库。
其他示例的来源：http://jefferyhaynes.net/2009/11/29/websphere-hibernate-datasource-configuration-for-mysql/
基于您的更新，编辑--我做了一些研究，看看我发现了什么：
(出发地：IBM)
错误是事务管理器无法将事务转换为XA事务。具体来说，甲骨文返回了一个错误XAER_RMERR，错误代码编号65535。ORA-65535不是一个有效的错误代码，XAER_RMERR本质上意味着XA出了问题。这表明您的Oracle数据库没有配置为支持XA事务。因此，当事务管理器指示参与此XA事务时，WebSphere无法遵从并抛出此异常。
另外，请务必查看一下您的context.xml和web.xml文件，在使用WS时，我常常忘记配置这些文件。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/16941106
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