Richfaces creates a org.apache.xerces.jaxp.DocumentBuilder instance for each request in ResponseWriterContentHandler.java, which causes bad performance. -------------------------------------------------------------------------------------------------------------------------------------------------------- Key: RF-10035 URL: https://issues.jboss.org/browse/RF-10035 Project: RichFaces Issue Type: Bug Security Level: Public (Everyone can see) Reporter: Gary Hu The thread dump shows that the Richfaces creates a org.apache.xerces.jaxp.DocumentBuilder instance for each request. # "ajp-10.176.196.243-48009-166" daemon prio=3 tid=0x0000000104c2cc00 nid=0x739 waiting for monitor entry [0xfffffffe2d0f6000..0xfffffffe2d0ff540] # java.lang.Thread.State: BLOCKED (on object monitor) # at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) # - waiting to lock <0xfffffffe700000e0> (a sun.misc.Launcher$AppClassLoader) # at java.lang.ClassLoader.loadClass(Unknown Source) # at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1299) # at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1229) # at org.apache.xerces.impl.dv.ObjectFactory.findProviderClass(Unknown Source) # at org.apache.xerces.impl.dv.ObjectFactory.newInstance(Unknown Source) # at org.apache.xerces.impl.dv.DTDDVFactory.getInstance(Unknown Source) # at org.apache.xerces.impl.dv.DTDDVFactory.getInstance(Unknown Source) # at org.apache.xerces.parsers.XML11Configuration.<init>(Unknown Source) # at org.apache.xerces.parsers.XIncludeAwareParserConfiguration.<init>(Unknown Source) # at org.apache.xerces.parsers.XIncludeAwareParserConfiguration.<init>(Unknown Source) # at sun.reflect.GeneratedConstructorAccessor5.newInstance(Unknown Source) # at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) # at java.lang.reflect.Constructor.newInstance(Unknown Source) # at java.lang.Class.newInstance0(Unknown Source) # at java.lang.Class.newInstance(Unknown Source) # at org.apache.xerces.parsers.ObjectFactory.newInstance(Unknown Source) # at org.apache.xerces.parsers.ObjectFactory.createObject(Unknown Source) # at org.apache.xerces.parsers.ObjectFactory.createObject(Unknown Source) # at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source) # at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source) # at org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(Unknown Source) # at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown Source) # at org.ajax4jsf.context.ResponseWriterContentHandler.<init>(ResponseWriterContentHandler.java:48) # at org.ajax4jsf.context.ViewResources$HeadResponseWriter.<init>(ViewResources.java:259) The creation of the org.apache.xerces.jaxp.DocumentBuilder instance is very expensive. We should reuse the org.apache.xerces.jaxp.DocumentBuilder instance and call the DocumentBuilder's reset() method to initialize it. -- This message is automatically generated by JIRA. - For more information on JIRA, see: http://www.atlassian.com/software/jira