[jira] Updated: (OFBIZ-4220) Current implementation of UtilCache has a memory leak

["Philippe Mouawad (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OFBIZ-4220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Philippe Mouawad updated OFBIZ-4220:
------------------------------------

    Attachment: patch_OFBIZ-4220.patch

Fix to the issue
Philippe

http://www.ubik-ingenierie.com

> Current implementation of UtilCache has a memory leak
> -----------------------------------------------------
>
>                 Key: OFBIZ-4220
>                 URL: https://issues.apache.org/jira/browse/OFBIZ-4220
>             Project: OFBiz
>          Issue Type: Bug
>          Components: framework
>    Affects Versions: SVN trunk
>         Environment: ALL
>            Reporter: Philippe Mouawad
>              Labels: CACHE, LEAK, MEMORY
>         Attachments: patch_OFBIZ-4220.patch
>
>
> Hello,
> Since some time UtilCache has been updated to replace the WeakHashMap by a ConcurrentHashMap:
>     private static final ConcurrentHashMap<String, UtilCache<?, ?>> utilCacheTable = new ConcurrentHashMap<String, UtilCache<?, ?>>();
> I think this fix to concurrency issues has introduced a memory leak or at least a much bigger impact on Memory.
> Indeed descendent of AbstractCache (particularly AbstractEntityConditionCache, EntityListCache) tend to create many caches that do not need to always persist in time.
> The old WeakHashMap handled this by enabling them to disappear while today the Hard ref disables this.
> We made some load testing and current implementation ends with an OutOfMemory.

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