[ http://jira.jboss.com/jira/browse/JBAS-1283?page=comments#action_12316709 ] Scott M Stark commented on JBAS-1283: -------------------------------------
Attach an example that illustrates your particular xml override scenario as I have tested being able to override the xml parser implementation in 4.0.2RC1 and it works as expected. There are some classes that cannot be overriden such as commons-logging currently, but the xml parser is not one of them. > Tomcat Unable to Compile JSPs when Separate ClassLoader Namespace Used for > Webapp > --------------------------------------------------------------------------------- > > Key: JBAS-1283 > URL: http://jira.jboss.com/jira/browse/JBAS-1283 > Project: JBoss Application Server > Type: Bug > Components: Web (Tomcat) service > Versions: JBossAS-3.2.6 Final > Environment: Stock JBoss 3.2.6 running on Linux (kernel 2.4.26), Sun JDK and > JRE version 1.4.2_04 > Reporter: Jeremy Brown > Assignee: Anil Saldhana > Priority: Minor > Attachments: test.war > > > See my initial forum post at > "http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3861452#3861452". > The dom4j libs provided by JBoss do not work correctly with my web > application, so I attempted to configure my webapp's "jboss-web.xml"--as per > the wiki page at > "http://www.jboss.org/wiki/Wiki.jsp?page=ClassLoadingConfiguration"--so that > my webapp would essentially be in a different classloader namspace and would > be able to override the server dom4j implementation with its own. Now, > Tomcat bails out during JSP compilation with a dom4j-related > ClassCastException, leading me to believe there might some problem with the > sort of setup I'm trying to attempt...for example, Tomcat's JSP compiler > might be trying to link with the dom4j in my application's namespace while > its classes have been loaded next to (and probably are already using) dom4j > in the server namespace. > I'll attach a .war file exhibiting this behavior to this bug report. > Here's the specific exception for this .war file: > java.lang.ClassCastException > at > javax.xml.parsers.DocumentBuilderFactory.newInstance(DocumentBuilderFactory.java:93) > at > org.apache.jasper.xmlparser.ParserUtils.parseXMLDocument(ParserUtils.java:91) > at > org.apache.jasper.compiler.JspConfig.processWebDotXml(JspConfig.java:70) > at org.apache.jasper.compiler.JspConfig.init(JspConfig.java:188) > at > org.apache.jasper.compiler.JspConfig.findJspProperty(JspConfig.java:240) > at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:160) > at org.apache.jasper.compiler.Compiler.compile(Compiler.java:470) > at org.apache.jasper.compiler.Compiler.compile(Compiler.java:451) > at org.apache.jasper.compiler.Compiler.compile(Compiler.java:439) > at > org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511) > at > org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295) > at > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) > at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) > at > org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) > at > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > at > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > at > org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198) > at > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > at > org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:66) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) > at > org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:158) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) > at > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > at > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > at > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) > at > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > at > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > at > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > at > org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929) > at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160) > at > org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) > at > org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) > at > org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) > at > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) > at java.lang.Thread.run(Thread.java:534) > Interestingly enough, I can copy my app-specific "dom4j-full.jar" over the > JBoss-provided "dom4j.jar" in "/lib", and everything works great. -- This message is automatically generated by JIRA. - 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