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https://issues.apache.org/jira/browse/MYFACES-1796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585268#action_12585268
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Leonardo Uribe commented on MYFACES-1796:
-----------------------------------------
Yes, the problem presented is clear. But I think that it is better to
synchronize some parts of the code instead use synchronized HashMaps. The
access to _registeredFactoryNames on getFactory must be synchronized to avoid
effects. And the value retrieved through classLoader (a Map) must be cleaned
for allow gc recolect memory.
I will do more tests about this and commit a modifications of the proposal
> FactoryFinder.releaseFactories() does not release application class loader.
> (PATCH available).
> ----------------------------------------------------------------------------------------------
>
> Key: MYFACES-1796
> URL: https://issues.apache.org/jira/browse/MYFACES-1796
> Project: MyFaces Core
> Issue Type: Bug
> Components: JSR-127
> Affects Versions: 1.1.5, 1.2.0
> Reporter: Konstantin Triger
> Assignee: Leonardo Uribe
>
> FactoryFinder._registeredFactoryNames holds the Web application class loader
> as a key and thus prevents its collection when the application is undeployed.
> The following patch fixes the issue (made in 1.1.5 branch):
> Index: FactoryFinder.java
> ===================================================================
> --- FactoryFinder.java (revision 608034)
> +++ FactoryFinder.java (working copy)
> @@ -40,7 +40,7 @@
> public static final String LIFECYCLE_FACTORY =
> "javax.faces.lifecycle.LifecycleFactory";
> public static final String RENDER_KIT_FACTORY =
> "javax.faces.render.RenderKitFactory";
> - private static Map _registeredFactoryNames = new HashMap();
> + private static Map _registeredFactoryNames =
> Collections.synchronizedMap(new HashMap());
> /**
> * Maps from classLoader to another map, the container (i.e. Tomcat)
> will create a class loader for
> * each web app that it controls (typically anyway) and that class
> loader is used as the key.
> @@ -49,7 +49,7 @@
> * that are created via getFactory. The instances will be of the class
> specified in the setFactory method
> * for the factory name, i.e.
> FactoryFinder.setFactory(FactoryFinder.APPLICATION_FACTORY, MyFactory.class).
> */
> - private static Map _factories = new HashMap();
> + private static Map _factories = Collections.synchronizedMap(new
> HashMap());
> private static final Set VALID_FACTORY_NAMES = new HashSet();
> private static final Map ABSTRACT_FACTORY_CLASSES = new HashMap();
> @@ -222,6 +222,7 @@
> {
> ClassLoader classLoader = getClassLoader();
> _factories.remove(classLoader);
> + _registeredFactoryNames.remove(classLoader);
> }
> private static void checkFactoryName(String factoryName)
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