I'm using SEAM with Ejb3 on jboss-4.0.5.GA, with SQL server 2000, driver jtds. On one of my server i got sometimes deadlock errors : 2008-08-28 17:51:03,381 WARN [org.hibernate.util.JDBCExceptionReporter] SQL Error: 1205, SQLState: 40001 | 2008-08-28 17:51:03,381 ERROR [org.hibernate.util.JDBCExceptionReporter] Transaction (Process ID 53) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction. | 2008-08-28 17:51:03,381 INFO [STDOUT] Exception during cancel org.hibernate.exception.LockAcquisitionException: could not execute query | 2008-08-28 17:51:03,381 ERROR [STDERR] javax.persistence.PersistenceException: org.hibernate.exception.LockAcquisitionException: could not execute query | 2008-08-28 17:51:03,381 ERROR [STDERR] at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:647) | 2008-08-28 17:51:03,381 ERROR [STDERR] at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:73) | 2008-08-28 17:51:03,381 ERROR [STDERR] at com.edieyes.optixml.ejb3.sessions.StockBean.cancel(StockBean.java:162) | The most important matter is that after it (even if i catch the Exception) my next query are all failed. Here is my part of code failing (on about 1% of time) : | @Stateless | public class StockBean implements RemoteStock{ | @PersistenceContext(unitName = "stocktest") | protected EntityManager em; | | | public void cancel(String orderNumber, String jobNumber) { | // TODO Auto-generated method stub | try{ | String query="SELECT c FROM StockReserved as c where c.orderNumber=?1 and c.jobNumber=?2"; | Query q = em.createQuery(query).setParameter(1, orderNumber).setParameter(2,jobNumber); | | Iterator iterator =q.getResultList().iterator(); | while(iterator.hasNext()){ | StockReserved stockReserved=(StockReserved) iterator.next(); | String oldCodeArticle=stockReserved.getCodeArticle(); | int oldQuantite=stockReserved.getQuantite(); | int status=stockReserved.getStatus(); | Stock stock=(Stock) em.createQuery("SELECT c FROM Stock c where codeArticle = ?1").setParameter(1,oldCodeArticle).getSingleResult(); | if(status==0)stock.setStockPreReserved(stock.getStockPreReserved()-oldQuantite); | else if(status==1)stock.setStockReserved(stock.getStockReserved()-oldQuantite); | | } | | | query="delete FROM StockReserved as c where c.orderNumber=?1 and c.jobNumber=?2"; | q = em.createQuery(query).setParameter(1, orderNumber).setParameter(2,jobNumber); | int deleted = q.executeUpdate(); | System.out.println(deleted+" JOBS DELETED "); | | /////*****IT FAILS HERE | | updateJobNumbers(orderNumber,jobNumber); | | | }catch(Exception e){ | | System.out.println("Exception during cancel "+e.getMessage()); | | | e.printStackTrace(); | } | } | | } | | It's Called like that | stockService.cancel("000021","001"); | The best should be not to have anymore this error... but all the tried I did failed.. so if you have a solution? Else I would like to have a way to go threw that and that the next query won't fail, because for now i have this Exception : javax.persistence.TransactionRequiredException: EntityManager must be access within a transaction | 2008-08-27 14:52:16,488 ERROR [STDERR] javax.ejb.EJBTransactionRolledbackException: javax.persistence.TransactionRequiredException: EntityManager must be access within a transaction | 2008-08-27 14:52:16,488 ERROR [STDERR] at org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:93) | or this one | 2008-08-28 17:51:03,490 WARN [org.hibernate.util.JDBCExceptionReporter] SQL Error: 0, SQLState: null | 2008-08-28 17:51:03,490 ERROR [org.hibernate.util.JDBCExceptionReporter] Transaction is not active: tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=SVR-EDIEYES/553168, BranchQual=, localId=553168]; - nested throwable: (javax.resource.ResourceException: Transaction is not active: tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=SVR-EDIEYES/553168, BranchQual=, localId=553168]) | 2008-08-28 17:51:03,490 INFO [STDOUT] getSupplementsGridsPriceByFabArea org.hibernate.exception.GenericJDBCException: Cannot open connection | THANKS FOR YOUR HELP View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4173292#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...