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From "Kevin Sutter (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-172) DSRA9250E: Operation setTransactionIsolation is not allowed during a global transaction for Shareable Connections.
Date Tue, 27 Mar 2007 02:00:32 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12484280
] 

Kevin Sutter commented on OPENJPA-172:
--------------------------------------

It sounds like WebSphere is working as expected.  Since you are attempting to modify a Connection
while a transaction is active, WebSphere is preventing the action.  As you outlined, this
would happen with setTransactionIsolation, setAutoCommit, and a few other settings that would
compromise a shared connection.

You could run with an Unshareable connection, but that's easier said than done since Shareable
connections are the default when accessing via direct JNDI lookups.

Another idea is to delay the starting of the transaction, but that may be application-specific.
 That is, you might be able to work around this situation in your given application, but that
doesn't sound like a general purpose solution.

What we might have to do is to use a JDBCConnectionSpec when attempting to get a Connection
via the WSDataSource interface.  This is very WebSphere specific, but I'm not sure what else
we can do.

I'm surprised that we haven't hit this type of problem with other application servers.  Either
the JNDI lookup is returning an Unshareable connection, or setting the isolation level on
Shareable connections is allowed.  Neither of these options is consistent with the expected
behavior.  Can anyone comment?  I'm trying to figure out if we have a WebSphere-specific situation
or a more genera problem.

Kevin

>  DSRA9250E: Operation setTransactionIsolation is not allowed during a global transaction
for Shareable Connections.
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-172
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-172
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: jpa
>    Affects Versions: 0.9.6
>         Environment: Websphere 6.1 for zos and DB2 zos V8
>            Reporter: Ritika Maheshwari
>             Fix For: 0.9.7
>
>
> My persistence.xml looks like following
> *******************************************************************************************************
> <?xml version="1.0" ?>
> <persistence xmlns="http://java.sun.com/xml/ns/persistence"
>              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>              version="1.0">
> <persistence-unit name="dwtest" transaction-type="JTA">
> <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
>    <non-jta-data-source>jdbc/ErwwDS</non-jta-data-source> 
>        <class>ejb.jpa.test.Customer</class> 
>         <class>ejb.jpa.test.District</class>
>         <class>ejb.jpa.test.Warehouse</class>
>         <class>ejb.jpa.test.History</class>
>        <class>ejb.jpa.test.Item</class>
>       <class>ejb.jpa.test.Neworders</class>
>       <class>ejb.jpa.test.Orderline</class>
>     <class>ejb.jpa.test.Orders</class>
>       <class>ejb.jpa.test.Stock</class>
>         <properties>
>    	
>  <property name="openjpa.LockManager" value="pessimistic"/>
> <property name="openjpa.ReadLockLevel" value="read"/>
> <property name="openjpa.WriteLockLevel" value="write"/>
> <property name="openjpa.LockTimeout" value="30000"/>
>  <property name="openjpa.FetchBatchSize" value="1" />
>  <property name="openjpa.jdbc.TransactionIsolation" value="read-committed" /> 
>   <property name="openjpa.Log" value="DefaultLevel=WARN, Runtime=INFO, Tool=INFO,SQL=TRACE"/>
> 			
>         </properties>
>     </persistence-unit>
> </persistence>
> *******************************************************************************************************************
> The Orderline entity looks like following
> *************************************************************************************************
> @Entity
> @IdClass(ejb.jpa.test.OrderlineId.class)
> @SequenceGenerator(name="mysequence",sequenceName="ORDER_ID")
> public  class Orderline implements Serializable{
> 	
> 	@Id
> 	@GeneratedValue(strategy=GenerationType.SEQUENCE,generator="mysequence")
> 	java.lang.Integer ol_o_id =  null;
> 	@Id
> 	java.lang.String ol_d_id = null;
> 	@Id
> 	java.lang.String ol_w_id = null;
> 	@Id
> 	java.lang.Short ol_number = null;
> 	java.lang.String ol_i_id = null;
> 	java.sql.Timestamp ol_delivery_d = null;
> 	java.lang.String ol_supply_w_id = null;
> 	java.lang.Short ol_quantity = null;
> 	java.math.BigDecimal ol_amount = null;
> 	java.sql.Timestamp itime = null;
> 	java.lang.String ol_dist_info = null;
> 	@ManyToOne(fetch=FetchType.LAZY)
> 	@JoinColumns({
> 	        @JoinColumn(name="ol_o_id", referencedColumnName="o_id"),
>             @JoinColumn(name="ol_d_id", referencedColumnName="o_d_id"),
>             @JoinColumn(name="ol_w_id", referencedColumnName="o_w_id")
>    })
> 	 Orders orders = null;
> 	@ManyToOne(fetch=FetchType.LAZY)
> 	@JoinColumns({
> 	        @JoinColumn(name="ol_i_id", referencedColumnName="s_i_id"),
>             @JoinColumn(name="ol_supply_w_id", referencedColumnName="s_w_id")
>             
>    })
> 	 Stock stock = null;
> *************************************************************************************************************************
> Now if I run the following client 
> UserTransaction ut = null;
> 		ClientEJB  facade = null;
> 		EntityManager em = null;
> 		try {
> 		Hashtable parms = new Hashtable();
> 		parms.put(	Context.INITIAL_CONTEXT_FACTORY,
> 			"com.ibm.websphere.naming.WsnInitialContextFactory");
> 		InitialContext ctx = new InitialContext(parms);
> 		ut = (UserTransaction) ctx.lookup("java:comp/UserTransaction");         			       
             ut.begin();
> 		em = getFactory().createEntityManager (); 
>                                            
>                                            try {
> 			OpenJPAEntityManager kem = OpenJPAPersistence.cast (em);
> 			kem.getFetchPlan().setReadLockMode(LockModeType.WRITE);
> 			 stock = (Stock)kem.find(Stock.class,stockKey);
> 			kem.getFetchPlan().setReadLockMode(null);
> 				
> 			} catch (Exception fe) {}
>                                            try {
> 				
> 		                     Timestamp itime = new Timestamp(System.currentTimeMillis());
> 			Orderline orderLine = new Orderline (districtId, warehouseId,
> 						new Short((short)ol_number), itemId,null, itemSupplyWarehouseId,new Short((short)itemQuantity),
amount, itime, stockDistInfo);
> 				em.persist(orderLine);
> 				em.flush();
> ***************************************************************************************************************
> I get the the following stack trace, which appears to happen when we try to get the next
 value from Sequence
> [3/12/07 13:59:06:496 PDT] 00000020 SystemErr     R 3073  TRACE  [WebContainer : 0] openjpa.jdbc.SQL
- <t 1503025558, conn 1348751460> executing prepstmnt 2134933312 SELECT t0.s_data, t0.s_dist_01,
t0.s_dist_02, t0.s_dist_03, t0.s_dist_04, t0.s_dist_05, t0.s_dist_06, t0.s_dist_07, t0.s_dist_08,
t0.s_dist_09, t0.s_dist_10, t0.s_order_cnt, t0.s_quantity, t0.s_remote_cnt, t0.s_ytd FROM
Stock t0 WHERE t0.s_i_id = ? AND t0.s_w_id = ? WITH RS USE AND KEEP UPDATE LOCKS [params=(String)
000111, (String) 0001]
> [3/12/07 13:59:06:498 PDT] 00000020 SystemErr     R 3075  TRACE  [WebContainer : 0] openjpa.jdbc.SQL
- <t 1503025558, conn 1348751460> [2 ms] spent
> [3/12/07 13:59:06:720 PDT] 00000020 SystemErr     R javax.ejb.EJBException: ClientEJB:
CreateException: OrderLineLocalHome create failed in placeNewOrder() of ClientEJB; nested
exception is: <0|true|0.9.6-incubating> org.apache.openjpa.persistence.PersistenceException:
DSRA9250E: Operation setTransactionIsolation is not allowed during a global transaction for
Shareable Connections.
> <0|true|0.9.6-incubating> org.apache.openjpa.persistence.PersistenceException:
DSRA9250E: Operation setTransactionIsolation is not allowed during a global transaction for
Shareable Connections.
>  at org.apache.openjpa.jdbc.sql.DBDictionary.newStoreException(DBDictionary.java:3764)
>  at org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:94)
>  at org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:80)
>  at org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:56)
>  at org.apache.openjpa.jdbc.kernel.AbstractJDBCSeq.next(AbstractJDBCSeq.java:59)
>  at org.apache.openjpa.util.ImplHelper.generateValue(ImplHelper.java:159)
>  at org.apache.openjpa.util.ImplHelper.generateFieldValue(ImplHelper.java:143)
>  at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.assignField(JDBCStoreManager.java:554)
>  at org.apache.openjpa.util.ApplicationIds.assign(ApplicationIds.java:435)
>  at org.apache.openjpa.util.ApplicationIds.assign(ApplicationIds.java:420)
>  at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.assignObjectId(JDBCStoreManager.java:538)
>  at org.apache.openjpa.kernel.DelegatingStoreManager.assignObjectId(DelegatingStoreManager.java:131)
>  at org.apache.openjpa.kernel.StateManagerImpl.assignObjectId(StateManagerImpl.java:471)
>  at org.apache.openjpa.kernel.StateManagerImpl.preFlush(StateManagerImpl.java:2662)
>  at org.apache.openjpa.kernel.PNewState.beforeFlush(PNewState.java:36)
>  at org.apache.openjpa.kernel.StateManagerImpl.beforeFlush(StateManagerImpl.java:845)
>  at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:1865)
>  at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:1825)
>  at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:1609)
>  at org.apache.openjpa.kernel.DelegatingBroker.flush(DelegatingBroker.java:959)
>  at org.apache.openjpa.persistence.EntityManagerImpl.flush(EntityManagerImpl.java:438)
>  at helpers.ClientEJB.placeNewOrder(Unknown Source)
>  at erww.web.ErwwController.performServicesForNewOrder(ErwwController.java:550)
>  at erww.web.ErwwController.performTask(ErwwController.java:272)
>  at erww.web.ErwwController.doGet(ErwwController.java:85)
>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
>  at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:966)
>  
> Any idea why is this happening is this a bug.It appears like that while trying to get
the next value from Sequence JPA tries to get a connection and then on the connection if the
isolationLevel is not already READ_COMMITTED it tries to set it to READ_COMMITTED and that
is where it blows out
> ritika

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