> > The problems seems to be located with Cglib classloaders > referencing > > policy. There is a lot of topic on the Net, which may be > interessing > > to read, but noone seems to have found a valuable solution. > > (Increasing the PermGenspace is NOT a reasonable solution) > > > That means, that hibernate apps will always generate OOM...
Not always. But some hibernate/cglib/tomcat uses seems to generate classloader memory leak: http://opensource.atlassian.com/confluence/spring/pages/viewpage.action? pageId=2669 You can easily reproduce this behaviour. Write a quite empty webapp with hibernate (so cglib too) which contains just a JSP/servlet which do a dummy DBMS request (select sysdate from dual) and print the result. -Deploy it -access to your JSP/servlet -reload webapp Write a Jmeter scenario that execute those 2 last steps. Repeat it many times (<10 times for a default heap sized JVM) You will see your Permgenspace always growing and crash at the high level (64MB default) > > The only way we found to fix it is to change the JVM. > Indeed if we use the BEA Jrockit 1.4 JVM, the application can > be deployed as many times you want... > > > Great news! Do you know whether their JVM (1.5) is free to > download and use? Yes it's free to download. For a commercial use you should check the license. But keep in mind, that may be a dangerous alternative. You don't know yet what could append with Jrockit. And the past releases don't tend to be stable as a sun one (to my experiences) Out solution is to install one instance of Tomcat per application : reducing memory heap use, ... And for each redeploy/reload we restart the tomcat service. A Heavy but working solution .... RC ------------------------------------------------------------------------------------------- "Cette communication (y compris les pieces jointes) est reservee a l'usage exclusif du destinataire (des destinataires) et peut contenir des informations privilegiees, confidentielles, exemptees de divulgation selon la loi ou protegees par les droits d'auteur. Si vous n'etes pas un destinataire, toute utilisation, divulgation, distribution, reproduction, examen ou copie (totale ou partielle) est non-autorisee et peut etre illegale. Tout message electronique est susceptible d'alteration et son integrite ne peut etre assuree. Sanofi Pasteur decline toute responsabilite au titre de ce message s'il a ete modifie ou falsifie. Si vous n'etes pas destinataire de ce message, merci de le detruire immediatement et d'avertir l'expediteur de l'erreur de distribution et de la destruction du message. Merci. This transmission (including any attachments) is intended solely for the use of the addressee(s) and may contain confidential information including trade secrets which are privileged, confidential, exempt from disclosure under applicable law and/or subject to copyright. If you are not an intended recipient, any use, disclosure, distribution, reproduction, review or copying (either whole or partial) is unauthorized and may be unlawful. E-mails are susceptible to alteration and their integrity cannot be guaranteed.Sanofi Pasteur shall not be liable for this e-mail if modified or falsified. If you are not the intended recipient of this e-mail, please delete it immediately from your system and notify the sender of the wrong delivery and the mail deletion. Thank you." ********************************************************************** --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
