EJB3 - 在事务中使用2个持久性单元(例外:本地事务已经有1个非XA资源)

Question

我试图在Glassfish上部署的Java EE应用程序中的同一事务中使用2个持久性单元.

这两个持久性单元在persistence.xml中定义,如下所示:

<persistence-unit name="BeachWater">
<jta-data-source>jdbc/BeachWater</jta-data-source>
...
<persistence-unit name="LIMS">
<jta-data-source>jdbc/BeachWaterLIMS</jta-data-source>
...

这些持久性单元对应于我在Glassfish中定义的JDBC资源和连接池,如下所示(这里包括一个,因为两者在名称和数据库连接信息之外是相同的):

JDBC Resource:
JNDI Name: jdbc/BeachWaterLIMS
Pool Name: BEACHWATER_LIMS

Connection Pool:
Name: BEACHWATER_LIMS
Datasource Classname: com.microsoft.sqlserver.jdbc.SQLServerConnectionPoolDataSource
Resource Type: javax.sql.ConnectionPoolDataSource

有3个无状态会话bean,LimsServiceBean,AnalysisServiceBean和AnalysisDataTransformationServiceBean.

以下是LimsServiceBean的相关摘录:

@PersistenceContext(unitName = "LIMS")
EntityManager em;
...
public ArrayList<Sample> getLatestLIMSData() {
    Query q = em.createNamedQuery("Sample.findBySubTypeStatus");
    return new ArrayList<Sample>(q.getResultList());
}

来自AnalysisServiceBean:

@PersistenceContext(unitName = "BeachWater")
EntityManager em;
...
public ArrayList<AnalysisType> getAllAnalysisTypes() {
    Query q = em.createNamedQuery("AnalysisType.findAll");
    return new ArrayList<AnalysisType>(q.getResultList());
}

并从AnalysisDataTransformationServiceBean:

@EJB
private AnalysisService analysisService;

@EJB
private LimsService limsService;

public void transformData() {
    List<AnalysisType> analysisTypes = analysisService.getAllAnalysisTypes();
    ArrayList<Sample> samples = limsService.getLatestLIMSData();

对limsService.getLatestLIMSData()的此调用导致以下异常:

     [exec] Caused by: javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean; nested exception is: Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.1 (Build b60e-fcs (12/23/2008))): oracle.toplink.essentials.exceptions.DatabaseException
 [exec] Internal Exception: java.sql.SQLException: Error in allocating a connection. Cause: java.lang.IllegalStateException: Local transaction already has 1 non-XA Resource: cannot add more resources.

咨询了这个页面,http://msdn.microsoft.com/en-us/library/ms378484.aspx(以及其他许多内容),我尝试将连接池的定义更改为:

Connection Pool:
Name: BEACHWATER_LIMS
Datasource Classname: com.microsoft.sqlserver.jdbc.SQLServerXADataSource
Resource Type: javax.sql.XADataSource

Ping通过Glassfish管理控制台成功,但调用analyzeService.getAllAnalysisTypes()现在抛出异常:

Caused by: javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean; nested exception is: Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.1 (Build b60e-fcs (12/23/2008))): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Error in allocating a connection. Cause: javax.transaction.SystemException

The resource manager is doing work outside a global transaction javax.transaction.xa.XAException: com.microsoft.sqlserver.jdbc.SQLServerException: Failed to create the XA control connection. Error: "Could not find stored procedure 'master..xp_sqljdbc_xa_init_ex'."

有任何想法吗？

Answer 1

更改Glassfish中连接池的配置:

Connection Pool:
Name: BEACHWATER_LIMS
Datasource Classname: com.microsoft.sqlserver.jdbc.SQLServerXADataSource
Resource Type: javax.sql.XADataSource

按照Senthil Balakrishnan的博客"如何使MSSQL Server XA数据源工作？"中的步骤进行操作.在这里,http://www.senthilb.com/2010/01/how-to-make-xa-datasource-work-in-mssql.html.

重启Glassfish.

Answer 2

为了在一个事务中使用两个持久性单元（以及两个数据源），您确实需要使用XA连接并相应地配置池（其中至少一个，GlassFish支持最后一个代理优化，该优化允许加入一个非XA资源，请参阅http://docs.sun.com/app/docs/doc/820-7695/beanm?a=view）。那是第一个错误。

对于第二个错误，似乎很难说出当前的详细程度。您能否提供堆栈跟踪信息（如果需要，请激活更精细的日志记录）？