XMLReaderManager can hold too much memory
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Key: XALANJ-2378
URL: https://issues.apache.org/jira/browse/XALANJ-2378
Project: XalanJ2
Issue Type: Improvement
Components: Xalan
Affects Versions: The Latest Development Code, 2.7.1
Reporter: Brian Minchau
XMLReaderManager has a scheme where each thread holds its own XMLReader for
re-use across subsequent transformations.
For example each thread used to run a servlet would cache and re-use the rather
large heavy weight XMLReader for re-use.
The problem is that this may lead to memory exhaustion in the name of
performance. This is not a memory leak that gets larger with time, but rather
that too many XMLReader-s may be cached and cause memory exhaustion.
Since we have moved beyond JRE 1.1.8 we can now use newer memory services, for
example we can hold the references to XMLReader-s with weak references that can
be garbage collected when memory runs low.
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