Weißböck Maximilian wrote:
>
> Philippe, it's good to know you are working on scalability!
>
> Regarding the Memory problem - you write that Jonas has a
> pool of Objects in Memory and there shold not be a real
> problem if we are using RMI.
>
> Well, we are using RMI and the 100.000 entity beans are loaded
> in 15 hours or so. This should be enogh time for
> the garbage collector to run - but we get the Out Of Memory
> Error. So I'm a little confused!
OK, so we need to run a profiler tool to see what are the objects
that are not freed. Probably a memory leak in jonas!
>
> Btw, thanks for your work on Jonas!
Thanks, we are doing our best.
> When do you expect Jonas 2.3 to be ready for download?
I don't know exactly, but not before the end of april. A pre-release
has already been put on CVS, but I don't think that it changes something
for your problem. It's likely that we put new releases on CVS before
the new "official" jonas 2.3 binary release.
>
> > -----Original Message-----
> > From: Philippe Durieux [mailto:[EMAIL PROTECTED]]
> > Sent: Tuesday, April 17, 2001 1:49 PM
> > To: Weißböck Maximilian
> > Cc: 'JOnAS DEV'; 'JOnAS USER'
> > Subject: Re: OutOfMeory Error
> >
> >
> > Weißböck Maximilian wrote:
> > >
> > > We have a mayor memory Problem regarding Jonas.
> > >
> > > In a real live test we tried to create about 100.000
> > > records in our database using a session bean that
> > > creates entity beans.
> > >
> > > At about 69.000 records we got the following error:
> > >
> > > ----
> > >
> > > System Exception in business method:java.lang.OutOfMemoryError
> > > ClientSocket: 172.16.100.115:4711
> > > ClientSocket: 172.16.100.115:3889
> > > Failed to close the PreparedStatement (findByPrimaryKey)
> > > java.sql.SQLException: Protokollverletzung
> > > at
> > oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:114)
> > > at
> > oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:156)
> > > at
> > oracle.jdbc.dbaccess.DBError.check_error(DBError.java:803)
> > > at oracle.jdbc.ttc7.Oclose.receive(Oclose.java:130)
> > > at
> > oracle.jdbc.ttc7.TTC7Protocol.close(TTC7Protocol.java:512)
> > > at
> > > oracle.jdbc.driver.OracleStatement.close(OracleStatement.java:467)
> > > at
> > >
> > oracle.jdbc.driver.OraclePreparedStatement.close(OraclePreparedStatem
> > > ent.java:257)
> > > at
> > >
> > at.intellinet.igel.commerzplus.eb.JOnASKontoBean.ejbFindByPrimaryKey(
> > > classes\at\intellinet\igel\commerzplus\eb\JOnASKontoBean.java:464)
> > > at
> > >
> > at.intellinet.igel.commerzplus.eb.JOnASKontoHome.findByPrimaryKey(cla
> > > sses\at\intellinet\igel\commerzplus\eb\JOnASKontoHome.java:142)
> > > at
> > >
> > at.intellinet.igel.commerzplus.eb.JOnASKontoHome_Skel.dispatch(classe
> > > s\at\intellinet\igel\commerzplus\eb\JOnASKontoHome_Skel.java:69)
> > > at
> > >
> > sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:319
> > > )
> > > at
> > > sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:187)
> > > at sun.rmi.transport.Transport$1.run(Transport.java:142)
> > > at
> > java.security.AccessController.doPrivileged(Native Method)
> > > at
> > sun.rmi.transport.Transport.serviceCall(Transport.java:139)
> > > at
> > >
> > sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:4
> > > 43)
> > > at
> > >
> > sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
> > > .java:643)
> > > at java.lang.Thread.run(Thread.java:484)
> > > postinvoke: System Exception in a home
> > method:java.lang.OutOfMemoryError
> > > System Exception in business method:java.rmi.ServerException:
> > > RemoteException o
> > > ccurred in server thread; nested exception is:
> > > java.rmi.RemoteException: Error thrown by an
> > enterprise Bean; nested
> > > exc
> > > eption is:
> > > java.lang.OutOfMemoryError
> > >
> > > ------
> > >
> > > Does this mean that Jonas keeps all the beans it generats
> > > in memory? Does it never free any resources?
> > >
> > > This is really a big problem to us, as we must handle at least
> > > about 100.000 new records per day!
> > >
> > > So does this mean we can not use Jonas???
> > >
> > > Thanks, Max
> > > ---
> > > Dipl.-Ing. Maximilian Weißböck
> > > i-online Software AG
> > > Tel.: +43 2236 3080 3785
> > > Handy: 0699 1888 3785
> > > Fax: +43 2236 3080 24 3785
> > > mailto:[EMAIL PROTECTED]
> > > http://www.i-online.cc
> > JOnAS does not keep all beans in memory. If you use RMI, the
> > distributed
> > garbage collector will inform jonas when beans are no more
> > used, and JOnAS
> > can dispose of them. In fact, they are put in a pool of
> > available objects.
> > THis is not perfect, because the garbage collector run only
> > every x? seconds
> > or minutes... Meanwhile, you can saturate the memory.
> > We are currently working to improve jonas scalability, for
> > session stateful
> > beans in particular. The coming jonas 2.3 should be more
> > scalable than jonas 2.2
> > If you use JEREMIE instead of RMI, I'm afraid this garbage
> > collector doesn't
> > work. You will have to wait for a next version of Jeremie if
> > scalability is
> > a mojor concern for you.
> > We know that scalability in JOnAS is one of our most
> > important concerns, and
> > we are working on it.
> > >
> > > ----
> > > To unsubscribe, send email to [EMAIL PROTECTED] and
> > > include in the body of the message "unsubscribe jonas-users".
> > > For general help, send email to [EMAIL PROTECTED] and
> > > include in the body of the message "help".
> >
> > --
> > Philippe Durieux ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > Bull - 1 rue de Provence - 38432 Echirolles Cedex France
> > [EMAIL PROTECTED]
> > -> Download our EJBServer at http://www.evidian.com/ejb <-
> > ----
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> >
--
Philippe Durieux ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Bull - 1 rue de Provence - 38432 Echirolles Cedex France
[EMAIL PROTECTED]
-> Download our EJBServer at http://www.evidian.com/ejb <-
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