On Thu, Apr 7, 2016 at 12:33 AM, Ivano Luberti <lube...@archicoop.it> wrote:
> Kalle, Chris, thanks for your answers. > Unfortunately the problem is not related to webapp reloading even > restarting the Tomcat service leads to out of PermGen in a few days, > PermGen itself is quite large and I already use UseConcMarkSweepGC. Down > The cause of the space consumption seems to be the presence of a lot of > classes of this type > org.apache.tapestry.enhance.ClassFactoryClassLoader > That's a symptom, not a cause. > It seems that the more request the application serves the more PermGen > increases and that's led me to think that the page pool is never cleaned up > or at least not well cleanedup. > Most likely, you have a permgen memory leak. Are you using streams and/or threads on your pages and are they properly closed, even in case of exceptions? I can't tell you how many memory leaks I've plugged over the years in thread and stream handling. Invariably, the errors are in your own code. See https://plumbr.eu/blog/memory-leaks/what-is-a-permgen-leak for possible causes for a permgen memory leak. Also, you are in luck because Tomcat 6 added some useful tools for detecting memory leaks (see http://wiki.apache.org/tomcat/MemoryLeakProtection, and Tomcat 7 and up is even able to recover from some of them). Take a heap dump of the stressed out system and load it in your VisualVM. Kalle > Il 06/04/2016 23:24, Kalle Korhonen ha scritto: > > If you run out of permgen space very quickly, then it's indicative that > the > > allocated permgen space is simply too small. Perhaps the new version of > > Tomcat requires more of it for itself, leaving less for your application. > > Is the webapp restarted at times? If so, that can easily cause permgen > > space to fill up because of the way OGNL works. And even if you are not > > restarting the app, you need to exercise all parts of your web > application > > to find out the true permgen space consumption of it. > > > > Kalle > > > > On Wed, Apr 6, 2016 at 1:49 PM, Ivano Luberti <lube...@archicoop.it> > wrote: > > > >> Hey Tony, if you don't mind, can you send me all the configuration > >> options of Java and Tomcat you are using? So tomcat6.conf and server.xml > >> files? > >> > >> No one else on the list can share its thoughts? > >> > >> Il 05/04/2016 23:03, Ivano Luberti ha scritto: > >>> Hi Tony thanks for the quick answer: > >>> > >>> Il 05/04/2016 21:50, Tony Nelson ha scritto: > >>>> I still have a Tapestry 4 app running with Tomcat 6.0.41, and it runs > >> well enough with: > >>>> -XX:MaxPermSize=1024m > >>> with that setting it fails but... > >>>> I also have > >>>> > >>>> -Xmx12g -Xms4g -XX:+UsseConcMarkSweepGC -XX:+UseParNewGC > >>> I have only -Xmx2g > >>> > >>> I use > >>> > >>> -XX:+UseConcMarkSweepGC > >>> > >>> but not > >>> > >>> -XX:+UseParNewGC > >>> > >>> > >>> but this last one doesn't seem to have an influence on PermGen, does > it? > >>> > >>> > >> -- > >> ================================================== > >> dott. Ivano Mario Luberti > >> Archimede Informatica societa' cooperativa a r. l. > >> Sede Operativa > >> Via Gereschi 36 - 56126- Pisa > >> tel.: +39-050- 580959 > >> tel/fax: +39-050-8932061 > >> web: www.archicoop.it > >> ================================================== > >> > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > >> For additional commands, e-mail: users-h...@tapestry.apache.org > >> > >> > > -- > ================================================== > dott. Ivano Mario Luberti > Archimede Informatica societa' cooperativa a r. l. > Sede Operativa > Via Gereschi 36 - 56126- Pisa > tel.: +39-050- 580959 > tel/fax: +39-050-8932061 > web: www.archicoop.it > ================================================== > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > For additional commands, e-mail: users-h...@tapestry.apache.org > >
