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Re: [eclipselink-users] COMMIT is not allowed in a subordinate session [message #529214]
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The issue is probably related to you acquiring your EntityManager outside of
the JTA transaction. Unless you use a managed (injected) EntityManager, it
will be bound to only the JTA transaction that it was acquired in. You can
use joinTransaction() to join a new JTA transaction.
So either move your initEM after the begin, or call joinTransaction, or
inject the EM.
See,
http://en.wikibooks.org/wiki/Java_Persistence/Transactions#J oin_Transaction
njr wrote:
>
> In My Servlet, I am using JTA transaction which is not a CMT.
> I am running this on Oracle XADatasource.
>
> When I'm trying to perform the DB operation, I'm getting the
> Exception saying "COMMIT is not allowed in a subordinate session "
>
> My Servlet code is :
> public class BatchServlet extends javax.servlet.http.HttpServlet
> implements
> javax.servlet.Servlet {
> PrintWriter out = null;
>
> @PersistenceUnit(unitName="PERUNIT")
> EntityManagerFactory emf;
>
> EntityManager em;
>
> @Resource
> UserTransaction utx;
>
> protected void doGet(HttpServletRequest request,
> HttpServletResponse response) throws ServletException, IOException {
> out = response.getWriter();
> try {
> initEM();
>
> utx.begin();
> updateDB();
> utx.commit();
>
> } catch (Exception ex) {
> ex.printStackTrace(out);
> utx.rollback();
> } finally {
> closeEM();
> }
> }
>
> public void initEM() throws Exception {
> em = emf.createEntityManager();
> }
>
> public void closeEM() {
> if (em != null) {
> em.close();
> }
> }
>
> private void updateDB() throws Exception {
> Address address = em.find(Address.class, 50030L);
> out.println("County :: " + address.getCounty());
> address.setBuildingNumber("Building # ABC");
> em.persist(address);
> out.println("Before Flush");
> em.flush();
> out.println("After Flush");
> }
>
> public BatchServlet() {
> super();
> }
> }
>
>
> My Persistence.xml is
> <?xml version="1.0" encoding="UTF-8"?>
> <persistence version="1.0"
> xmlns="http://java.sun.com/xml/ns/persistence";
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
> http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd";>
>
> <persistence-unit name="PERUNIT" transaction-type="JTA">
> <provider>
> org.eclipse.persistence.jpa.PersistenceProvider</provider>
> <jta-data-source>MYXADS</jta-data-source>
>
> <class> com.test.Address</class>
> <properties>
> <property name="eclipselink.logging.level" value="CONFIG"/>
> <property name="javax.persistence.jtaDataSource"
> value="jdbc/MYXADS"/>
> <property name="eclipselink.logging.level" value="FINE"/>
> </properties>
> </persistence-unit>
> </persistence>
>
>
> Any inputs please
>
>
-----
http://wiki.eclipse.org/User:James.sutherland.oracle.com James Sutherland
http://www.eclipse.org/eclipselink/
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