[Solr Wiki] Update of "SolrResin" by KenKrugler

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The following page has been changed by KenKrugler:
http://wiki.apache.org/solr/SolrResin

The comment on the change is:
Add note about Resin issue with XML parsing

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  </web-app>
  }}}
  
+ 
+ === Resin's XML Parsing Problems ===
+ 
+ Note that many versions of Resin have shipped with an XML parser implementation that's a bit sketchy.
+ 
+ This typically shows up with you get an error during schema parsing.
+ 
+ There's a section near the beginning of the {{{web.xml}}} file, which (if uncommented) switches the XML parser to Xerces.
+ 
+ {{{
+   <!-- Uncomment if you are trying to use a Resin version before 3.0.19.
+     Their XML implementation isn't entirely compatible with Xerces.
+     Below are the implementations to use with Sun's JVM.
+   <system-property javax.xml.xpath.XPathFactory=
+              "com.sun.org.apache.xpath.internal.jaxp.XPathFactoryImpl"/>
+   <system-property javax.xml.parsers.DocumentBuilderFactory=
+              "com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl"/>
+   <system-property javax.xml.parsers.SAXParserFactory=
+              "com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl"/>
+    -->
+ }}}
+ 
+ Note that versions after 3.0.19 have also been reported as having issues with parsing of odd (but still legal) XML.
+