Hi,
i'm a little bit confused. Just migrated from JBoss 4.0.3 SP1 to 4.0.4 GA and
all my reflection-using Servlets exploded with the following exception...
| 19:45:53,263 ERROR [STDERR] java.lang.IllegalArgumentException
| 19:45:53,263 ERROR [STDERR] at
sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:37)
| 19:45:53,263 ERROR [STDERR] at
sun.reflect.UnsafeIntegerFieldAccessorImpl.set(UnsafeIntegerFieldAccessorImpl.java:57)
| 19:45:53,263 ERROR [STDERR] at
java.lang.reflect.Field.set(Field.java:656)
| 19:45:53,263 ERROR [STDERR] at
de.sung.servlet.ReflectionTest.doGet(ReflectionTest.java:28)
| 19:45:53,263 ERROR [STDERR] at
javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
| 19:45:53,263 ERROR [STDERR] at
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
| 19:45:53,323 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| 19:45:53,323 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| 19:45:53,323 ERROR [STDERR] at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| 19:45:53,323 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| 19:45:53,323 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| 19:45:53,323 ERROR [STDERR] at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| 19:45:53,323 ERROR [STDERR] at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| 19:45:53,323 ERROR [STDERR] at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| 19:45:53,323 ERROR [STDERR] at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| 19:45:53,323 ERROR [STDERR] at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| 19:45:53,323 ERROR [STDERR] at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| 19:45:53,323 ERROR [STDERR] at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| 19:45:53,323 ERROR [STDERR] at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| 19:45:53,323 ERROR [STDERR] at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
| 19:45:53,323 ERROR [STDERR] at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
| 19:45:53,323 ERROR [STDERR] at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
| 19:45:53,323 ERROR [STDERR] at
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
| 19:45:53,323 ERROR [STDERR] at java.lang.Thread.run(Thread.java:595)
| 19:45:53,323 INFO [STDOUT] value: 0
|
Normally I deploy my WAR within an EAR but I built a simple WAR for testing
those fuzzy reflection exceptions.
the servlet
| package de.sung.servlet;
|
| import java.io.IOException;
| import java.lang.reflect.Field;
|
| import javax.servlet.ServletException;
| import javax.servlet.http.HttpServlet;
| import javax.servlet.http.HttpServletRequest;
| import javax.servlet.http.HttpServletResponse;
|
| public class ReflectionTest extends HttpServlet {
|
| private int valueToSetByReflection;
|
| @Override
| protected void doGet(HttpServletRequest arg0, HttpServletResponse arg1)
throws ServletException, IOException {
| Field fields[] = this.getClass().getDeclaredFields();
|
| for ( Field field : fields ) {
|
| if ( field.getName().equals("valueToSetByReflection") )
{
|
| if ( ! field.isAccessible() ) {
| field.setAccessible( true );
| }
|
| try {
| field.set("valueToSetByReflection", new
Integer(1337) );
| } catch (IllegalArgumentException e) {
| e.getMessage();
| e.printStackTrace();
| } catch (IllegalAccessException e) {
| e.getMessage();
| e.printStackTrace();
| }
| }
|
| }
|
| System.out.println("value: " + valueToSetByReflection);
| }
|
| }
|
the web.xml
| <web-app version="1.0">
|
| <display-name>Reflection Servlet Test</display-name>
| <description>Test for showing Reflection problems</description>
|
| <servlet>
| <servlet-name>ReflectionTest</servlet-name>
| <servlet-class>de.sung.servlet.ReflectionTest</servlet-class>
| <display-name>Reflection Test</display-name>
| </servlet>
|
| <servlet-mapping>
| <servlet-name>ReflectionTest</servlet-name>
| <url-pattern>/test</url-pattern>
| </servlet-mapping>
|
| </web-app>
|
the war-file
| reflectiontest.war
| | META-INF
| | |_ MANIFEST.MF
| |
| | WEB-INF
| | |_ web.xml
| | |_ classes
| | |_ de.sung.servlet.ReflectionTest.class
|
I hope you've some hints about that strange behaviour... Is it maybe a bug in
the Tomcat?
Regards,
Hauke
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