Hi, I've seen the exact thing but didn't have the time (yet) to get a hold of it. But since it's mostly Wicket classes involved I had the impression it's wicket itself that does this. To prove something like it, I wanted to create an example which would work in both world (pax-wicket and wicket) but due to lack of time I wasn't able to get to it.
But since I'm not the only one I'd guess this is something worthy to investigate :) My next test would have been to switch to Wicket 6 (pax-wicket 2.0) regards, Achim 2012/10/22 Bram Pouwelse <b...@pouwelse.com>: > Hi, > > I'm working on an application that's using Pax Wicket (version 1.1.0). > Because the application is using more memory than expected I'm running > some tests and analysing heap dumps for a few days now. > > While analysing the heap of my "weekend test" I've found this at the > top of the Pax Wicket bundle class loader at the top of the dominator > tree, seems to me that the PropertyResolver is creating new > DefaultClassCache instances all the time but I don't understand why. > > Below I've pasted a few selections from Eclipse Memory Analyzer: > > > Dominator tree: > > Class Name > | Shallow Heap | Retained Heap | > Percentage > ----------------------------------------------------------------------------------------------------------------------------------------------------- > org.apache.felix.framework.BundleWiringImpl$BundleClassLoaderJava5 @ > 0xc123ee58 | 88 | 643,602,288 | > 89.39% > |- java.util.Vector @ 0xc1252208 > | 32 | 643,566,800 | > 89.38% > | '- java.lang.Object[1280] @ 0xc2445ee8 > | 5,136 | 643,566,768 | > 89.38% > | |- class org.apache.wicket.util.lang.PropertyResolver @ > 0xb9b5d330 | 32 | > 643,420,472 | 89.36% * > | | '- java.util.concurrent.ConcurrentHashMap @ 0xc2962bf8 > | 48 | 643,420,440 | > 89.36% > | | '- java.util.concurrent.ConcurrentHashMap$Segment[16] @ > 0xc2962c28 | 80 | 643,420,392 | > 89.36% > | | |- java.util.concurrent.ConcurrentHashMap$Segment @ > 0xc2963098 | 40 | 643,418,872 | > 89.36% ** > | | | |- > java.util.concurrent.ConcurrentHashMap$HashEntry[262144] @ 0xd8674190 > | 1,048,592 | 643,418,768 | 89.36% > | | | | '- > java.util.concurrent.ConcurrentHashMap$HashEntry @ 0xea9687a8 > | 32 | 642,370,176 | 89.22% > | | | | |- > java.util.concurrent.ConcurrentHashMap$HashEntry @ 0xea967a28 > | 32 | 642,366,720 | 89.22% > | | | | | |- > java.util.concurrent.ConcurrentHashMap$HashEntry @ 0xea966ca8 > | 32 | 642,363,264 | 89.22% *** > | | | | | |- > org.apache.wicket.util.lang.PropertyResolver$DefaultClassCache @ > 0xea967398| 16 | 3,424 | 0.00% > | | | | | '- Total: 2 entries > | | | > | | | | |- > org.apache.wicket.util.lang.PropertyResolver$DefaultClassCache @ > 0xea968118 | 16 | 3,424 | 0.00% > | | | | '- Total: 2 entries > | | | > ----------------------------------------------------------------------------------------------------------------------------------------------------- > > * class org.apache.wicket.util.lang.PropertyResolver @ 0xb9b5d330 [statics]: > Type|Name |Value > --------------------------------------------------------------------------------------------- > ref |SET |set > ref |IS |is > ref |GET |get > ref > |applicationToClassesToGetAndSetters|java.util.concurrent.ConcurrentHashMap > @ 0xc2962bf8 > int |RESOLVE_CLASS |2 > int |CREATE_NEW_VALUE |1 > int |RETURN_NULL |0 > ref |log > |org.ops4j.pax.logging.slf4j.Slf4jLogger @ 0xc2972ba0 > --------------------------------------------------------------------------------------------- > > ** java.util.concurrent.ConcurrentHashMap$HashEntry[262144] @ > 0xd8674190 [attributes] > Type |Name |Value > -------------------------------------------------------------------------------------- > float|loadFactor|0.75 > ref |table > |java.util.concurrent.ConcurrentHashMap$HashEntry[262144] @ 0xd8674190 > int |threshold |196608 > int |modCount |185871 > int |count |185871 > ref |sync |java.util.concurrent.locks.ReentrantLock$NonfairSync > @ 0xc29630c0 > -------------------------------------------------------------------------------------- > > > *** java.util.concurrent.ConcurrentHashMap$HashEntry @ 0xea966ca8 [attributes] > Type|Name |Value > --------------------------------------------------------------------------------------------------- > ref |next |java.util.concurrent.ConcurrentHashMap$HashEntry @ 0xea965f28 > ref |value|org.apache.wicket.util.lang.PropertyResolver$DefaultClassCache > @ 0xea966618 > int |hash |1234246985 > ref |key > |nl.ditp.fabuland.core.internal.WicketApplication$$EnhancerByCGLIB$$4188d86a > @ 0xc22bcc88 > --------------------------------------------------------------------------------------------------- > > > Is this caused by a coding error in the application or a bug in Wicket > / Pax Wicket? > > Thanks, > > Bram Pouwelse > > _______________________________________________ > general mailing list > general@lists.ops4j.org > http://lists.ops4j.org/mailman/listinfo/general -- Apache Karaf <http://karaf.apache.org/> Committer & PMC OPS4J Pax Web <http://wiki.ops4j.org/display/paxweb/Pax+Web/> Committer & Project Lead OPS4J Pax for Vaadin <http://team.ops4j.org/wiki/display/PAXVAADIN/Home> Commiter & Project Lead blog <http://notizblog.nierbeck.de/> _______________________________________________ general mailing list general@lists.ops4j.org http://lists.ops4j.org/mailman/listinfo/general
