WAR isolation in 3.2.2
Hi,
I'm trying to isolate a WAR file as described on:
http://www.jboss.org/wiki/Wiki.jsp?page=ClassLoadingConfiguration
In my small example I'm trying to force a servlet to a use version of Xerces that I distribute with the servlet (located under WEB-INF/lib). It fails during deployment with the following exception:
10:52:52,967 INFO [STDOUT] JDOM Exception: org.jdom.JDOMException: Could not load default SAX parser: org.apache.xerces
.parsers.SAXParser: SAX2 driver class org.apache.xerces.parsers.SAXParser does not implement XMLReader
10:52:52,967 ERROR [STDERR] org.jdom.JDOMException: Could not load default SAX parser: org.apache.xerces.parsers.SAXPars
er: SAX2 driver class org.apache.xerces.parsers.SAXParser does not implement XMLReader
10:52:52,967 ERROR [STDERR] at org.jdom.input.SAXBuilder.createParser(SAXBuilder.java:495)
10:52:52,967 ERROR [STDERR] at org.jdom.input.SAXBuilder.build(SAXBuilder.java:341)
10:52:52,967 ERROR [STDERR] at org.jdom.input.SAXBuilder.build(SAXBuilder.java:684)
10:52:52,967 ERROR [STDERR] at org.jboss.mx.metadata.XMLMetaData.build(XMLMetaData.java:242)
10:52:52,967 ERROR [STDERR] at org.jboss.mx.modelmbean.XMBean.(XMBean.java:191)
10:52:52,967 ERROR [STDERR] at org.jboss.mx.modelmbean.XMBean.(XMBean.java:218)
10:52:52,967 ERROR [STDERR] at org.jboss.web.tomcat.mbean.ServletInfo.createServletMBean(ServletInfo.java:45)
10:52:52,967 ERROR [STDERR] at org.jboss.web.tomcat.tc4.EmbeddedTomcatService.createWebContext(EmbeddedTomcatService
.java:543)
10:52:52,967 ERROR [STDERR] at org.jboss.web.tomcat.tc4.EmbeddedTomcatService.performDeploy(EmbeddedTomcatService.ja
va:309)
10:52:52,967 ERROR [STDERR] at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:428)
10:52:52,967 ERROR [STDERR] at org.jboss.deployment.MainDeployer.start(MainDeployer.java:832)
10:52:52,967 ERROR [STDERR] at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:642)
10:52:52,967 ERROR [STDERR] at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:605)
10:52:52,977 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor46.invoke(Unknown Source)
10:52:52,977 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
10:52:52,977 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:324)
10:52:52,977 ERROR [STDERR] at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java
:284)
10:52:52,977 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
10:52:52,977 ERROR [STDERR] at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
10:52:52,977 ERROR [STDERR] at $Proxy6.deploy(Unknown Source)
10:52:52,987 ERROR [STDERR] at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:30
2)
10:52:52,987 ERROR [STDERR] at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:476)
10:52:52,987 ERROR [STDERR] at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractD
eploymentScanner.java:201)
10:52:52,997 ERROR [STDERR] at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymen
tScanner.java:274)
10:52:52,997 ERROR [STDERR] at org.jboss.system.ServiceMBeanSupport.start(ServiceMBeanSupport.java:192)
10:52:52,997 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
10:52:52,997 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
10:52:53,007 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:324)
10:52:53,007 ERROR [STDERR] at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java
:284)
10:52:53,007 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
10:52:53,017 ERROR [STDERR] at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:976)
10:52:53,017 ERROR [STDERR] at $Proxy0.start(Unknown Source)
10:52:53,017 ERROR [STDERR] at org.jboss.system.ServiceController.start(ServiceController.java:394)
10:52:53,017 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
10:52:53,027 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
10:52:53,027 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:324)
10:52:53,027 ERROR [STDERR] at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java
:284)
10:52:53,037 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
10:52:53,037 ERROR [STDERR] at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
10:52:53,037 ERROR [STDERR] at $Proxy4.start(Unknown Source)
10:52:53,047 ERROR [STDERR] at org.jboss.deployment.SARDeployer.start(SARDeployer.java:226)
10:52:53,047 ERROR [STDERR] at org.jboss.deployment.MainDeployer.start(MainDeployer.java:832)
10:52:53,047 ERROR [STDERR] at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:642)
10:52:53,047 ERROR [STDERR] at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:605)
10:52:53,057 ERROR [STDERR] at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:589)
10:52:53,057 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
10:52:53,057 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
10:52:53,057 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
10:52:53,067 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:324)
10:52:53,067 ERROR [STDERR] at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java
:284)
10:52:53,067 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:546)
10:52:53,077 ERROR [STDERR] at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
10:52:53,077 ERROR [STDERR] at $Proxy5.deploy(Unknown Source)
10:52:53,077 ERROR [STDERR] at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:384)
10:52:53,077 ERROR [STDERR] at org.jboss.system.server.ServerImpl.start(ServerImpl.java:291)
10:52:53,087 ERROR [STDERR] at org.jboss.Main.boot(Main.java:150)
10:52:53,087 ERROR [STDERR] at org.jboss.Main$1.run(Main.java:395)
10:52:53,087 ERROR [STDERR] at java.lang.Thread.run(Thread.java:536)
10:52:53,087 ERROR [STDERR] Caused by: java.lang.ClassCastException
10:52:53,087 ERROR [STDERR] at org.xml.sax.helpers.XMLReaderFactory.createXMLReader(XMLReaderFactory.java:131)
10:52:53,097 ERROR [STDERR] at org.jdom.input.SAXBuilder.createParser(SAXBuilder.java:487)
10:52:53,097 ERROR [STDERR] ... 57 more
10:52:53,097 ERROR [STDERR] Caused by:
10:52:53,097 ERROR [STDERR] java.lang.ClassCastException
10:52:53,097 ERROR [STDERR] at org.xml.sax.helpers.XMLReaderFactory.createXMLReader(XMLReaderFactory.java:131)
10:52:53,097 ERROR [STDERR] at org.jdom.input.SAXBuilder.createParser(SAXBuilder.java:487)
10:52:53,097 ERROR [STDERR] at org.jdom.input.SAXBuilder.build(SAXBuilder.java:341)
10:52:53,107 ERROR [STDERR] at org.jdom.input.SAXBuilder.build(SAXBuilder.java:684)
10:52:53,107 ERROR [STDERR] at org.jboss.mx.metadata.XMLMetaData.build(XMLMetaData.java:242)
10:52:53,107 ERROR [STDERR] at org.jboss.mx.modelmbean.XMBean.(XMBean.java:191)
10:52:53,107 ERROR [STDERR] at org.jboss.mx.modelmbean.XMBean.(XMBean.java:218)
10:52:53,117 ERROR [STDERR] at org.jboss.web.tomcat.mbean.ServletInfo.createServletMBean(ServletInfo.java:45)
10:52:53,117 ERROR [STDERR] at org.jboss.web.tomcat.tc4.EmbeddedTomcatService.createWebContext(EmbeddedTomcatService
.java:543)
10:52:53,117 ERROR [STDERR] at org.jboss.web.tomcat.tc4.EmbeddedTomcatService.performDeploy(EmbeddedTomcatService.ja
va:309)
However, the application apparently works as intended. It prints out Xerces version 2.6.2 and not 2.0.1 which is bundled with JBoss. But I do not like the exception during deployment. Anyway to get rid of it?
If I tell Tomcat to isolate war files globally (by editing deploy/jbossweb-tomcat41.sar/META-INF/jboss-service.xml) the situation is worse. When the web-console is deployed NullPointerExceptions are thrown. My servlet deploys fine. However, it does not write the correct version of Xerces when I hit the servlet (2.0.1 and not 2.6.2 which is the one I distribute).
My code is below. Any suggestions to what is going on. Is it at all possible to distribute ones own XML parser?
import org.apache.xerces.impl.Version;
import java.io.*;
import javax.servlet.http.*;
import javax.servlet.*;
public class HelloServlet extends HttpServlet {
public void doGet(HttpServletRequest req,
HttpServletResponse res)
throws ServletException, IOException {
PrintWriter out = res.getWriter();
System.out.println("I'm hit. I'm using Xerces version " + Version.fVersion);
out.println("Hello, world!");
out.println("I'm using Xerces version " + Version.fVersion);
out.close();
}
}
My jboss-web.xml looks like this:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE jboss-web PUBLIC "-//JBoss//DTD Web Application 2.3V2//EN" "http://www.jboss.org/j2ee/dtd/jboss-web_3_2.dtd"> <jboss-web> <class-loading java2ClassLoadingCompliance="false" > <loader-repository> jboss.cl.test:loader=JBossCLExample.war <loader-repository-config> java2ParentDelegaton=false </loader-repository-config> </loader-repository> </class-loading> </jboss-web>
My web.xml looks like this:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"> <web-app> <servlet> <servlet-name>hello</servlet-name> <servlet-class>HelloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>hello</servlet-name> <url-pattern>/hello</url-pattern> </servlet-mapping> </web-app>