Xerces consuming memory when reusing parser 2003-03-13 - By sandygao@(protected)
Does seem like a bug. Where the objects are allocated would be extremely
useful. Could you also provide your xml/xsd files. Thx.
Sandy Gao
Software Developer, IBM Canada
(1-905) 413-3255
sandygao@(protected)
Rob Griffin
<rob.griffin@(protected) To: xerces-j-user@(protected)
.apache.org
uest.com> cc:
Subject: Xerces consuming
memory when reusing parser
03/11/2003 08:31
PM
Please respond to
xerces-j-user
Hi,
I have a problem with Xerces 2.3.0 consuming memory in a long running
application.
Here's my setup code:
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance
();
factory.setValidating(true);
factory.setIgnoringComments(true);
factory.setNamespaceAware(true);
factory.setAttribute("
http://apache.org/xml/features/dom/defer-node-expansion", Boolean.FALSE);
factory.setAttribute("
http://xml.org/sax/features/external-parameter-entities", Boolean.FALSE);
factory.setAttribute("
http://apache.org/xml/features/validation/schema", Boolean.TRUE);
I am using an XML Schema for validation.
I then get one instance of DocumentBuilder from this factory and use it to
repeatedly validate documents.
Last night I ran it overnight with another process feeding in a small XML
document ( < 10 elements) every
ten seconds. This morning I see more than 260,000 instances of
org.apache.xerces.impl.xs.XSAttributeUseImpl.
Forcing a garbage collection does not free these objects. There are no
other objects with anywhere near this count.
The resulting document is being used to create a Java object, but in this
case that object is almost
immediately deferenced. I can see the count of that type fall to zero
periodically, which is what I expect.
Is this a bug? If so I can give more details about where these objects are
being allocated.
As a workaround I am now periodically creating a new DocumentBuilderFactory
and DocumentBuilder and this
fixes the problem, but I'd rather not have to do this.
Regards,
Rob Griffin
Software Engineer
Quest Software
2/293 Camberwell Road
Camberwell, Victoria 3124
Australia
Phone: +613 98118021
Fax: +613 9811 8099
http://www.quest.com
---------------------------------------------------------------------
To unsubscribe, e-mail: xerces-j-user-unsubscribe@(protected)
For additional commands, e-mail: xerces-j-user-help@(protected)
|
|
