Dear all,
Just a warning to anyone using xerces in their web app.
The current version of xerces shipped with orion sort of leaks memory
(xerces issue, not orions).
org.w3c.Document objects continue to hold a reference to any
org.w3c.traversal.TreeWalker objects created so if the TreeWalker goes out
of scope it's not garbage collected.
The latest release of Xerces, Document doesn't hold a reference to
TreeWalker.
In a scenario where:
1. your web app through a servlet or jsp loads a xml config file as a static
variable
2. on subsequent posts or gets creates a TreeWalker to go over the Document
you will be *leaking memory* unless you manually call removeTreeWalker in a
xerces specific way.
If orion shipped the latest xerces/xalan then this problem would go away and
we'd have access to better transformation libraries, etc.
We've tried replacing xerces.jar with the latest version. It fixes the
memory leak problem but xalan falls over
Greg.
----- Original Message -----
From: "Ted R. Rice" <[EMAIL PROTECTED]>
To: "Orion-Interest" <[EMAIL PROTECTED]>
Sent: Saturday, March 10, 2001 4:58 AM
Subject: RE: How about the latest xerces.jar and xalan.jar?
> i've experience similar issues with orion 1.4.7 and
> saxon 6.2.1.
>
> if you update the versions of xerces to 1.3 and xalan
> to 2.0, you will get the MethodNotFound error when
> doing any javax.xml package calls. only way i got
> around it was:
>
> 1. remove jaxp.jar from the orion dir
> 2. open up xalan.jar and remove all the javax.xml classes
>
> additionally, we use UTF-8 encoding on all of XML/XSLT
> files to support localization. if you set the default-charset in
> the global-web-applicaiton.xml to be UTF-8 it will not work
> as it complains about unrecognized UTF-8 characters in the
> XML files. hoewever, the second you remove the default-charset
> it works perfectly.
>
> everything i've mentioned was never a problem until 1.4.7. none
> of our code has changed and it never had an issue with the
> default-charset,
> jaxp, or xalan/xerces.
>
> ted rice
>
> -----Original Message-----
> From: Duffey, Kevin
> Sent: Fri 3/9/2001 9:42 AM
> To: Orion-Interest
> Cc:
> Subject: How about the latest xerces.jar and xalan.jar?
>
>
>
> Orion team (and whoever else is interested),
>
> I am working on a small framework that uses Saxon and requires
> the latest
> xerces.jar file. I just did an autoupdate and it downloaded
> xerces.jar into
> the orion folder (I deleted the one that was there because of
> the problem I
> am about to describe). When I started my app, the MethodNotFound
> error I got
> when I left the 589KB version of xerces.jar in the Orion folder
> came back.
> So two things. First, can you please add the latest xerces
> 1.3.0. Its 1.5MB
> in size, but it adds a lot of new functionality that some of us
> are now
> using. Secondly, why is it when xerces.jar is in the Orion
> folder, Orion
> does NOT use the version I have in the WEB-INF/lib folder? I
> thought (sorry
> if I don't recall what the specs say on this) that libraries in
> the
> WEB-INF/lib of a web-app override the ones in a server dir?
>
> Thanks.
>
>
>
>
