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https://issues.apache.org/jira/browse/CAY-1668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13222503#comment-13222503
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Andrew Lindesay edited comment on CAY-1668 at 3/5/12 6:59 PM:
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For what it is worth; I have tested commons 3.1 and 3.2 with a small test rig
and the problem appears to be gone in 3.2. By code introspection, I can't
easily see how they resolved it though.
was (Author: apl):
For what it is worth; I have tested commons 3.1 and 3.2 with a small test
rig and the problem appears to be gone in 3.2.
> Memory Exhaustion Problem with Deserialization of ObjectContext
> ---------------------------------------------------------------
>
> Key: CAY-1668
> URL: https://issues.apache.org/jira/browse/CAY-1668
> Project: Cayenne
> Issue Type: Bug
> Components: Core Library
> Affects Versions: 3.0.2
> Environment: MacOS-X 10.7, Java 1.6.0_29, Simple Web Application run
> in the Maven plugin "jetty-maven-plugin"
> Reporter: Andrew Lindesay
>
> I am running a simple web application launched from maven using
> "jetty-maven-plugin". The simple web application has a Filter which does
> this;
> 1) Copies the HttpSession's attributes to a Map
> 2) Serializes the Map
> 3) Deserializes the Map
> 4) Copies the entries of the Map back into HttpSession
> In each case, the ClassLoader should be the same (no stranded singletons
> etc...) and there is no "hot deploy" happening. The purpose of this
> undertaking is to ensure that the application is able to handle serialized
> sessions. In doing this experiment, I have observed a memory exhaustion
> issue around serializing and de-serializing ObjectContext. If I explicitly
> stop serializing "ObjectContext" then the problem stops.
> Using jprofiler, I have observed that the memory consumption increases
> roughly exponentially in relation to the number of
> serialization/de-serialization events. Also from jquery analysis I see the
> memory is being referenced from;
> org.apache.commons.collections.map.AbstractHashedMap$HashEntry[]
> > org.apache.commons.collecitons.map.LRUMap
> >> org.apache.cayenne.access.jdbc.SQLTemplateResourceManager
> >>> ...velocity
> The problem manifests itself quite quickly; a few dozen serialize +
> de-serialize phases.
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