Actually, Tapestry (and HiveMind as well) uses Javassist to generate classes at runtime, but all the rest is still true with Javassist as it is with CGLIB (hibernate uses CGLIB). As Martin said, enabling caching should fix the problem. Tapestry will only generate (and cache) the classes for each page/component one time with caching enabled. In a production environment, you really shouldn't run into this, since you would have caching enabled and you wouldn't be hot redeploying your application.
James > Hi all, > This problem is very common with Tapestry applications. This is due to > the fact that Tapestry uses cglib to generate classes at runtime. > Java uses a separate Heap space called "PermGenSpace" to put meta-data > about classes, which is never garbage collected (this is "normal" since > normally, classes never change...) but with cglib, classes are > generated, which add to the PermGenSpace. And the next time your > application is deployed, new classes are generated which add to the > PermGenSpace, etc... So it fills and become full. > So this problem is common to Java+Tapestry/cglib+deployed webapps. > I hope this explaination is clear. Else ask questions. > -jec > > Harvey, David a écrit : >> Hello all, >> >> We've been having occasional problems with PermGen out of space errors >> thrown during the execution of our Tapestry application. We usually get >> a stack trace with something about hivemind at the top (see below). >> Then, of course, we have to restart our app server. Our environment is >> >> Tapestry 4.0.1 and Tacos4-Beta3 >> Jboss 4.0.3 sp1 (Tomcat 5.5 embedded) >> JRE 1.5.0_03 >> >> The java runtime is initialized with >> -XX:PermSize=96M -XX:MaxPermSize=128M >> >> The stack trace we get at various times is: >> >> 2006-07-20 17:25:11,415 ERROR >> [net.sf.tacos.ajax.impl.AjaxDirectServiceImpl] Error invoking listener >> on component $AjaxForm_40 >> org.apache.hivemind.ApplicationRuntimeException: PermGen space >> [context:/WEB-INF/pages/claims/addEdit.page, line 6, column 93] >> at >> org.apache.tapestry.engine.RequestCycle.rewindForm(RequestCycle.java:461 >> ) >> at >> net.sf.tacos.ajax.components.AjaxForm.trigger(AjaxForm.java:418) >> at >> net.sf.tacos.ajax.impl.AjaxDirectServiceImpl.triggerComponent(AjaxDirect >> ServiceImpl.java:348) >> . >> . >> . >> >> Caused by: java.lang.OutOfMemoryError: PermGen space >> >> >> Anybody have any clues as to what we can do about this? >> >> Regards, >> David Harvey >> Ingenix, Inc. >> >> "Secure Server BSK" made the following >> annotations on 07/21/2006 03:28:13 PM >> ------------------------------"This e-mail, including attachments, may >> include confidential and/or proprietary information, and may be used >> only by the person or entity to which it is addressed. If the reader of >> this e-mail is not the intended recipient or his or her authorized >> agent, the reader is hereby notified that any dissemination, >> distribution or copying of this e-mail is prohibited. If you have >> received this e-mail in error, please notify the sender by replying to >> this message and delete this e-mail immediately." >> ============================== >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > James Carman, President Carman Consulting, Inc. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
