The following comment has been added to this issue:
Author: Hans Gilde
Created: Sat, 18 Sep 2004 11:17 PM
Body:
ThreadLocal is working fine.
However, ThreadLocal uses a structure like WeakHashMap. The key to the map is the
ThreadLocal object (it might as well be the TagScript instance b/c there's one
ThreadLocal per TagScript instance). The value in the map is the Tag implementation.
The problem is that the value (the tag implementation) keeps a reference to the key.
This is because the Tag keeps a reference to the Script of its body, the body script
keeps a reference to its parent, the parent is the TagScript that's used as the key in
the map.
So, once entered into the HashMap, the key and value stay forever.
Solving this problem necessitates a change in the way TagScripts and Tags work
together and is more complicated than I initially thought.
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View this comment:
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View the issue:
http://issues.apache.org/jira/browse/JELLY-148
Here is an overview of the issue:
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Key: JELLY-148
Summary: Huge memory leak resulting from the use of ThreadLocal
Type: Bug
Status: Unassigned
Priority: Critical
Project: jelly
Components:
core / taglib.core
Versions:
1.0-beta-5
Assignee:
Reporter: Hans Gilde
Created: Sat, 18 Sep 2004 9:34 PM
Updated: Sat, 18 Sep 2004 11:17 PM
Description:
There is a huge memory leak that results from the TagScript's use of ThreadLocal.
ThreadLocal is usually used from a staic variable, while TagScript uses it from an
instance variable. Although this looks legal to me, it causes a huge memory leak.
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