[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2131) SYBASE +select for update is showing deadlock because lock is not working properly

SYBASE +select for update is showing deadlock because lock is not working properly ---------------------------------------------------------------------------------- Key: HHH-2131 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2131 Project: Hibernate3 Issue Type: Bug Components: core Affects Versions: 3.1.3 Environment: sybaseASE 12.5.03 in solaris +hibernate3.1.3 Reporter: George Thomas I am connecting to Sybase database from hibernate.I tried setting locks using while selecting rows 1.session.load(class,id,LOCKMODE.UPGRADE) 2.session.lock(obj,LOCKMODE.UPGRADE) I am attaching a sample code while updating a field in table fund after selecting it. { Fund fund = null; ClientCredential credential = new ClientCredential("testDatabase", fund); org.hibernate.Session session = SessionFactoryManager.getSessionFactory(credential).getCurrentSession(); Transaction transaction = session.beginTransaction(); log.info("Run by " + Thread.currentThread().getName()); fund = (Fund) session.get(Fund.class, new Short((short)12), LockMode.UPGRADE); fund.setLegalEntityOrgId(fund.getLegalEntityOrgId()+1); transaction.commit(); } my requirement was that i wanted to do a select for update.I should acquire lock on certain rows and do a matching and if concurrent request comes ,it should wait till transaction is over that is lock is released. When I went through the hibernate code,the hibernate is making static queries in the beginning while loading session factory.Since we are appending the holdlock during execution,the sybase dialect is not appending. As a work around I tested with native sql with holdlock but when I test concurrent request using threads its bombing.Its throwing LockAcquisitionException.( Your server command (family id #0, process id #3777) encountered a deadlock situation.).can anyone give a solution to this problem??? org.hibernate.exception.LockAcquisitionException: could not update: [com.citco.aexeo.common.dataaccess.domain.Fund#12] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:84) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2223) at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2118) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2375) at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:91) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:233) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:297) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:985) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:333) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:107) at com.satyam.Testing.doTransaction(Testing.java:103) at com.satyam.MyRunnable.run(MyRunnable.java:13) at java.lang.Thread.run(Thread.java:568) Caused by: com.sybase.jdbc2.jdbc.SybSQLException: Your server command (family id #0, process id #3777) encountered a deadlock situation. Please re-run your command. at com.sybase.jdbc2.tds.Tds.processEed(Tds.java:2636) at com.sybase.jdbc2.tds.Tds.nextResult(Tds.java:1996) at com.sybase.jdbc2.jdbc.ResultGetter.nextResult(ResultGetter.java:69) at com.sybase.jdbc2.jdbc.SybStatement.nextResult(SybStatement.java:204) at com.sybase.jdbc2.jdbc.SybStatement.nextResult(SybStatement.java:187) at com.sybase.jdbc2.jdbc.SybStatement.updateLoop(SybStatement.java:1642) at com.sybase.jdbc2.jdbc.SybStatement.executeUpdate(SybStatement.java:1625) at com.sybase.jdbc2.jdbc.SybPreparedStatement.executeUpdate(SybPreparedStatement.java:91) at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:23) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2205) ... 14 more