Some time ago I posted to the list regarding a stack overflow error that I was receiving and the advice was to make sure that I didn't have a page storing a reference to another page. We did track this down and have just had to ignore it in the production logs. Now we've made it a priority to track this down.
Anyway, we've recently tracked this down to "AutomaticMultiWindowSupport" feature. We are able to recreate the bug by pasting a url into a new browser window and thus generating a new pagemap. On a certain page the memory consumption doubles as you generate new pagemaps (see the chart below). The profile is indicating that the memory is being taken up by a hashmap, but that's as far as we've been able to trace it so far. > PageMap # Size Growth > 13 389523448 1.93 > 12 202059096 1.93 > 11 104804096 1.93 > 10 54352280 1.93 > 9 28182760 1.93 > 8 14594976 1.93 > 7 7549336 1.94 > 6 3900704 1.94 > 5 2013480 2 > 4 1006960 2 > 3 503696 2 > 2 252072 1.86 > 1 135704 Any thoughts or tips on trying to get to the bottom of this one? Here's the stack trace > at sun.reflect.GeneratedMethodAccessor42.invoke(Unknown Source) > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) > at java.lang.reflect.Method.invoke(Unknown Source) > at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source) > at java.io.ObjectOutputStream.writeSerialData(Unknown Source) > at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.writeObject(Unknown Source) > at java.util.LinkedList.writeObject(Unknown Source) > at sun.reflect.GeneratedMethodAccessor40.invoke(Unknown Source) > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) > at java.lang.reflect.Method.invoke(Unknown Source) > at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source) > at java.io.ObjectOutputStream.writeSerialData(Unknown Source) > at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) > at java.io.ObjectOutputStream.writeSerialData(Unknown Source) > at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) > at java.io.ObjectOutputStream.writeSerialData(Unknown Source) > at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) > at java.io.ObjectOutputStream.defaultWriteObject(Unknown Source) > at org.apache.wicket.Component.writeObject(Component.java:4660) > at sun.reflect.GeneratedMethodAccessor38.invoke(Unknown Source) > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) > at java.lang.reflect.Method.invoke(Unknown Source) > at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source) > at java.io.ObjectOutputStream.writeSerialData(Unknown Source) > at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.writeArray(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) > at java.io.ObjectOutputStream.writeSerialData(Unknown Source) > at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.writeArray(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) > at java.io.ObjectOutputStream.writeSerialData(Unknown Source) > at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.writeArray(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) > at java.io.ObjectOutputStream.writeSerialData(Unknown Source) > at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.writeArray(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) > at java.io.ObjectOutputStream.writeSerialData(Unknown Source) > at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.writeArray(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) > at java.io.ObjectOutputStream.writeSerialData(Unknown Source) > at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) > at java.io.ObjectOutputStream.writeObject0(Unknown Source) > at java.io.ObjectOutputStream.writeObject(Unknown Source) > at > org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory$2.writeObjectOverride(IObjectStreamFactory.java:121) > at java.io.ObjectOutputStream.writeObject(Unknown Source) > at > org.apache.wicket.util.lang.Objects.objectToByteArray(Objects.java:1124) > at > org.apache.wicket.protocol.http.pagestore.AbstractPageStore.serializePage(AbstractPageStore.java:203) > at > org.apache.wicket.protocol.http.pagestore.DiskPageStore.prepareForSerialization(DiskPageStore.java:1190) > at > org.apache.wicket.protocol.http.SecondLevelCacheSessionStore$SecondLevelCachePageMap.writeObject(SecondLevelCacheSessionStore.java:389)
