Session « JDBC « JPA Q&A





1. Oracle 9i Session Disconnections    stackoverflow.com

[Cross-Posting from ServerFault] I am in a development environment, and our test Oracle 9i server has been misbehaving for a few days now. What happens is that we have our JDBC connections ...

2. Have Oracle automatically roll back abandoned sessions?    stackoverflow.com

Is there any way to guarantee that an application won't fail to release row locks in Oracle? If I make sure to put commit statements in finally blocks, that handles the ...

3. Hibernate's session.connection Error: "Too many users"    stackoverflow.com

I am developing a Java web application using Hibernate, but there is a part of it where I want to use JDBC because I am creating look-up tables dynamically. After a few ...

4. Hibernate Session creation exception after server idle    stackoverflow.com

I am using a simple java application for manipulating the table records from browser. I have used hibernate for making DAO calls. The application works fine on normal usage. However ...

6. Opening a session in hibernate    coderanch.com

Hi, I am working with hibernate to connect to HSQL. I have created a static session factory and using it in all the methods where I need to connect to HSQL. But in those each time I'm creating a new session object by calling SessionFactory.openSession(). Now if I create a static session reference and reuse it in deifferent methods to neglect ...

7. NoClassDefFoundError: org/hibernate/Session    java-forums.org

Error 500--Internal Server Error java.lang.NoClassDefFoundError: org/hibernate/Session at struts.action.inputAction.execute(inputAction.java:33) at org.apache.struts.action.RequestProcessor.processActionPerform (RequestProcessor.java:484) at org.apache.struts.action.RequestProcessor.process (RequestProcessor.java:274) at org.apache.struts.action.ActionServlet.process (ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doPost (ActionServlet.java:525) at javax.servlet.http.HttpServlet.service (HttpServlet.java:760) at javax.servlet.http.HttpServlet.service (HttpServlet.java:853) at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run (ServletStubImpl.java:971) at weblogic.servlet.internal.ServletStubImpl.invokeServlet (ServletStubImpl.java:402) at weblogic.servlet.internal.ServletStubImpl.invokeServlet (ServletStubImpl.java:305) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run (WebAppServletContext.java:6350) at weblogic.security.acl.internal.AuthenticatedSubject.doAs (AuthenticatedSubject.java:317) at weblogic.security.service.SecurityManager.runAs (SecurityManager.java:118) at weblogic.servlet.internal.WebAppServletContext.invokeServlet (WebAppServletContext.java:3635) at weblogic.servlet.internal.ServletRequestImpl.execute (ServletRequestImpl.java:2585) at weblogic.kernel.ExecuteThread.execute (ExecuteThread.java:197) at weblogic.kernel.ExecuteThread.run (ExecuteThread.java:170)

8. Creating many Sessions for limited USers in Hibernate    java-forums.org

Hi, I have to improve the performance of an existing application where Hibernate is used for DB tx. I have also received few statistics of DB where it indicates that there is proper indexing in column of table. However, I have noticed that there was 883 sessions used for around 100 users. Could someone suggest what could be the reason is ...

9. When do session execute the JDBC statements?    forum.hibernate.org





10. Multiple co-existent Sessions on the same JDBC Connection    forum.hibernate.org

Hi, I have an unusual Hibernate usage scenario (client-side) in which it would be advantagous to create more than one Hibernate Session attached the same JDBC connection. The architecture I have will guarantee that these Sessions are never used concurrently from different threads - i.e. I will never have concurrent transactions in progress. I have very good reasons for needing to ...

11. Possible Session bug when providing my own jdbc connections?    forum.hibernate.org

Not sure if this is the desired behavior here, however, I am providing my own database connections on session creation. I am using the Session as a cache for retrieving specific user data within form fields for prepopulating them. I do not have a datasource defined in my hibernate properties since I am providing my own connections at session creation. What ...

12. Possible Session bug when providing my own jdbc connections?    forum.hibernate.org

Not sure if this is the desired behavior here, however, I am providing my own database connections on session creation. I am using the Session as a cache for retrieving specific user data within form fields for prepopulating them. I do not have a datasource defined in my hibernate properties since I am providing my own connections at session creation. What ...

13. Own JDBC-Connection replaced in Session    forum.hibernate.org

Hi If AggressiveReleaseEnabled is true (which it seems to be by default in jboss 4.0.2) and I fetch a session with a given JDBC-connection (method SessionFactory.openSession(Connection conn)). After the first question this jdbc-connection is gone (probable to the connection pool) and replaced with a WrappedConnection in the Session. If the connection came from the connection pool in the first place it ...

14. about session,sessionfactory,jdbc conn    forum.hibernate.org

15. Hibernate design question - session and JDBC connection mgmt    forum.hibernate.org

Hi, I'd like to find out how Hibernate deals with JDBC connections obtained from connection pool. My app runs in Sun app server. Connection pool points to Oracle db. I use CMT for transaction management. When I need to get Hibernate session I call SessionFactory.getCurrentSession(). I understand that session is bound to JTA transaction. What I don't understand is the underlaying ...

16. Can a session reuse a single jdbc connection for many txns?    forum.hibernate.org

I'm using Hibernate 3.2 with Spring, with OpenSessionInViewFilter building a session for each request. Everything is working properly. However, as I began to performanc-tune the application, I noticed that a lot of threads were blocked trying to return JDBC connections to the pool (DBCP, under Tomcat). Looking at thread dumps showed that many of these returns are inside my business logic, ...