deadlock « Transaction « JPA Q&A





1. Is This A Deadlock - Please see code    stackoverflow.com

is this is a deadlock? it seems to lock java.io.PrintStream a lot. it would happen very randomly, if your would take a look. the printstream object with id 0x67804350 was locked simultaneously ...

2. Hibernate: Is there a risk for deadlocks when using locking?    coderanch.com

What do you mean by locking? Are you talking about pessimistic locks? Or optimistic locks (versioning as its know in Hibernate). Do you have a source for your claim? One thing I can say, ignoring Hibernate, whether or not deadlocks are likely in a relational database is more down to what transaction isolation level you use and which database you use. ...

3. hibernate with postgres - deadlocks    coderanch.com

hi mates, I have some really stressed application, kind of system, where customers are making actions triggering insert/updates in about 6-8 tables. Now I got traffic increased, when this action is performed about 30 times in a minute and deadlocks start to appear :/ I think with my hardware, 8 CPUs 2,4GHz each and 16GB of RAM it should be possible ...

4. RDB Deadlock    forum.hibernate.org

5. Deadlock detected    forum.hibernate.org

We are experiencing a deadlock occasionally during a merge on an entity. The entity - Application - has a OneToMany relationship with EduWish using CascadeType.ALL and CascadeType.DELETE_ORPHAN. The EduWish below has three OneToOne relationships to EduWishInst. Please see the entities in the code at the end of this message. We are basically in a JPA setting but use CascadeType.DELETE_ORPHAN to make ...

6. Deadlock found when trying to get lock    forum.hibernate.org

Hello, I have a problem, the code is like this... method1(...) { //Create Session ... iter1 = session.find(...).iterator(); while (iter1.hasNext()) { obj = iter1.next(); ... method2(session, obj); ... session.save(obj); } method2 (session, obj) { Query q = session.createQuery(...); q.setParameter("xxx", obj.getXXX()); q.setParameter("yyy", obj.getYYY()); q.list() // HERE throws the exception } GRAVE: Could not synchronize database state with session java.sql.SQLException: General error, message ...

7. JCS IndexedDiskCache deadlock/LRUMemoryCache memory leak    forum.hibernate.org

We are currently using Hibernate/JCS in a production system with more than a 1000 users. The large number of users seems to have unearthed a few serious problems in JCS. JCS IndexedDiskCache Deadlock The IndexedDiskCache causes a deadlock. We are able to reproduce it every time in 2 to 10 minutes of load testing. We have implemented a new IndexedDiskCache. It ...

8. Automatic deadlock recovery    forum.hibernate.org

I would like to implement an automatic recovery scheme for deadlock exceptions thrown from JDBC commit. Something like this (incomplete) code: public void commit() throws HibernateException { try { aJDBCTransaction.commit(); } catch( HibernateException e ) { { // rollback the connection aSession.connection().rollback(); // wait a random amount of time long t ...

9. deadlock exception not reported by Loader.doQuery()    forum.hibernate.org

Hi, I have a problem detecting the deadlock situation in Hibernate. To retry a select when a deadlock happens I need to detect a specific SQLException with ErrorCode=1205 in Sybase. When running Hbernate the deadlock exception is logged by JDBCExceptionReporter but not thrown back to the client. Instead a different SQLException "JZ0EM: End of data" happens when net.sf.hibernate.loader.Loader.doQuery() closes resultset in ...





10. Ex "Deadlock found when trying to get lock" when u    forum.hibernate.org

Author Message Yashnoo Post subject: Ex "Deadlock found when trying to get lock" when u Posted: Sun Jan 02, 2005 6:21 am Senior Joined: Wed Dec 17, 2003 4:24 am Posts: 188 2.1.6 It is one-to-one User.hbm.xml

11. Hibernate with Ingress - Deadlock problem    forum.hibernate.org

Hi, We are using Hibernate 2.1.7 with Ingress Database and EDBC (edbc.jar) as a jdbc driver for my web application. Things are working fine for single user. If more then one user try to access (getting ) data from same table then I am getting Deadlock exception. Can anyone please help us. Hibernate Utility public class HibernateUtility { private static final ...

12. APPARENT DEADLOCK!!    forum.hibernate.org

Hi. These deadlocks are most commonly seen under Oracle, using older versions of c3p0. Please upgrade the c3p0-0.9.0-pre6, and try turning statement caching back on. (I'm hoping that the Oracle deadlock sometimes seen with Statement caching turned on has been fixed.) If you do see the deadlock reoccur, please post the deadlock output (which in recent versions of c3p0 is quite ...

13. deadlock problem    forum.hibernate.org

Hi there, I am running into an oracle deadlock problem in developing an application with Hibernate 3.0 and WSAD 5.0 (integrated Edition). I have a class mapped to a table: A->a, and a's primary key is another table, let's say d, foreign key. So A and D classes are defined as below: Code: class A { Long key; ...

14. Deadlock-Problem    forum.hibernate.org

Hi, im using Hibernate to access a MySQL-database. Very often i get problems with deadlocks. Searching the net for a solution i found out that for example using AUTOCOMMIT=1 and the LOCK TABLES command can cause these problems. Hibernate hides most of the database access-behaviour, so i dont really know what happens behind the scenes. Does anybody know what i have ...

15. APPARENT DEADLOCK!!!    forum.hibernate.org

Author Message wmaloles Post subject: APPARENT DEADLOCK!!! Posted: Wed Oct 12, 2005 11:30 pm Newbie Joined: Wed Oct 12, 2005 10:40 pm Posts: 2 Hello, I have a service that receives an XML file from a socket. As a file is received, a new thread is created to parse the file and stores the results in a MySQL database. ...

16. Database Deadlocks    forum.hibernate.org

Hello all. I am fairly new with Hibernate and running into an issue I can't resolve. I have a Message Driven Bean which recieves a Hibernate Object. After some manupulations with that object, it is being saved into DB (Informix in my case). Every now and again that creates deadlocks in database, which are very difficult to resolve. I think I ...





17. Deadlock Found    forum.hibernate.org

I am using MySQL 5.0.18, with JBoss 4.0.4GA, and Hibernate. We found out that we get the error when we replicate similar actions. Meaning when two users performing similar actions and happen to click on the submit button at the same time and want to create a new record, we get the following error: 10:07:19,269 WARN [JDBCExceptionReporter] SQL Error: 1213, SQLState: ...

18. Resubmitting Session/Transaction after deadlock    forum.hibernate.org

19. Deadlocks while using Hibernate    forum.hibernate.org

Hello All, I'm using Hibernate 3.0 on WAS 5.0 server. We have multiple databases involved in the application. All of our SQLs are native SQLs defined in mapping files. The problem we are having with using Hibernate is that, it creates huge no. of locks in the database which sometimes result into deadlock situation. All of our SQL execution goes through ...

20. Deadlock at UpdateTimeStampCache    forum.hibernate.org

21. Recovering from a database deadlock exception    forum.hibernate.org

Hi, I am trying to saveOrUpdate an object using Hibernate 3.0 and I occasionally get database deadlock exceptions (from SQL Server 2005). The object has some one to many relationships with other classes and the saveOrUpdate cascades through these relationships. The related objects also have some one to many relationships. What I want to do when the database exception occurs is ...

22. Deadlock Exception with Composite-element    forum.hibernate.org

In nutshell, our application creates pakages. A package can have one or many source file revisions. There is a package class and SourceFileRevision class. The problem is users see deadlock error every now and then. The error says: ----------------------------------------------- The following error has occured: Hibernate operation: could not delete collection rows:[businessObject.Package.sourceFileRevision#2]; uncategorized SQLException for SQL [delete from package_source_file_xref where package_id=? and ...