Re: [Hibernate] java.lang.OutOfMemoryError: PermGen space

[Jeoff W. <jeo...@gm...>]

http://docs.jboss.org/jbossas/jboss4guide/r2/html/ch13.html#ch13.config.table
hibernate.cglib.use_reflection_optimizer=false

Set this in hibernate.properties, as a java system property, or by calling
Configuration#setProperty() directly.

You can postpone the problem a bit using the java command flag
-XX:MaxPermSize.
e.g. from http://www.caucho.com/support/resin-interest/0512/0022.html
> Of course we can increase the PermGen size by adding -XX:MaxPermSize to
> the command line. Though this only increases N and pushes the problem
> further away, but it will always occur eventually.

On 6/5/07, John Mitchell <mit...@gm...> wrote:
>
> Jeff,
>
> Thanks for the info!  How do I turn off CGLIB?
>
> Thanks,
>
> John Mitchell
>
> On 6/4/07, Jeoff Wilks < jeo...@gm...> wrote:
> >
> > Every time the CGLIB Enhancer generates a new class, that generated
> > class jumps straight to the PermGen (permanent generation) of your java
> > heap. CGLIB Enhancers are faster in terms of performance, but more dangerous
> > in terms of memory consumption. (I ran into this same problem with another
> > product that uses CGLIB.)
> >
> > Try turning off CGLIB and just have hibernate use reflection. If that
> > solves the problem, then you can always work on tuning CGLIB later.
> >
> >
> > On 6/4/07, John Mitchell <mit...@gm...> wrote:
> >
> > >  Hi,
> > >
> > > I have been having to restart Apache Tomcat as frequently as once a
> > > day and I suspect the problem is related to hibernate.
> > >
> > > I have attached an error log from apache tomcat:
> > >
> > > I get the following error below
> > >
> > > ERROR BasicLazyInitializer:105 - CBLIB Enhancement failed:
> > > com.insequence.gv.ProductOrder
> > >
> > > then further down the log file
> > >
> > > java.lang.OutOfMemoryError: PermGen space
> > >
> > > I also noticed towards the beginning of the log file
> > >
> > > 13:26:55,625  INFO DriverManagerConnectionProvider:41 - Using
> > > Hibernate built-in connection pool (not for production use!)
> > > 13:26:55,640  INFO DriverManagerConnectionProvider:42 - Hibernate
> > > connection pool size: 1
> > >
> > > Do I need to switch to a different connection pool and if so what?
> > > Should I change the "Hibernate connection pool size: 1"  to a number
> > > higher than 1 for better stability and if so what number?
> > >
> > > Thanks,
> > >
> > > --
> > > John J. Mitchell
> > >
> > > -------------------------------------------------------------------------
> > > This SF.net email is sponsored by DB2 Express
> > > Download DB2 Express C - the FREE version of DB2 express and take
> > > control of your XML. No limits. Just data. Click to get it now.
> > > http://sourceforge.net/powerbar/db2/
> > > _______________________________________________
> > > hibernate-devel mailing list
> > > hib...@li...
> > > https://lists.sourceforge.net/lists/listinfo/hibernate-devel
> > >
> > >
> > >
> >
>
>
> --
> John J. Mitchell