Re: Problems with Tomcat4, Reflection Classloading
Hi all, I am using Tomcat 4.0 final, JDK 1.4 beta 3, Win98 for dev. I am using a automatic bean population class to automatically populate bean based on request object just like in Struts. Ok, now the problem comes during population when I receive the following exception. java.lang.IllegalArgumentException: object is not an instance of declaring class at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:42 ) I notice this problem when Tomcat is left unused for sometime also when a class when compiled is re-loaded by tomcat. since some property is not set its validation fails is sent back to form page with the errors highlighted. I also get the error with the HEAD of Tomcat, and Slide (both during init, and the error occurs all the time). If I continue sending request or try to refresh the page it then gives the the following error Root Cause: java.lang.NoClassDefFoundError: sun/reflect/MethodAccessorImpl at sun.misc.Unsafe.defineClass(Native Method) at sun.reflect.ClassDefiner.defineClass(ClassDefiner.java:49) at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:384) This seems to be a serious error in classloading mechanism or in reflection. I am using exactly same logic as in struts so should not be wrong, coz the bean population etc works fine for a long time perfectly well until the server is kept idle for some time or reloading of classes. Once again my config is Tomcat 4.0 final, Win98, JDK 1.4 beta 3. There's also a tester failure with JDK 1.4, which doesn't happen with other JDKs. Until proven wrong, I'll assume both are a JDK issue. If I were you, I would try a different JDK (1.3.1 looks like a good choice). Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Problems with Tomcat4, Reflection Classloading
Hi all, I am using Tomcat 4.0 final, JDK 1.4 beta 3, Win98 for dev. I am using a automatic bean population class to automatically populate bean based on request object just like in Struts. Ok, now the problem comes during population when I receive the following exception. java.lang.IllegalArgumentException: object is not an instance of declaring class at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:42) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:28) at java.lang.reflect.Method.invoke(Method.java:327) at com.co.util.FormUtil.populateBean(FormUtil.java:66) at com.co.util.FormUtil.populateBean(FormUtil.java:18) at DomcnoEtppServlet.doGet(Unknown Source) at DomcnoEtppServlet.doPost(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at MVCServlet.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown Source) at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source) at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContextValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.valves.CertificatesValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContext.invoke(Unknown Source) at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.valves.AccessLogValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardEngineValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.connector.http.HttpProcessor.process(Unknown Source) at org.apache.catalina.connector.http.HttpProcessor.run(Unknown Source) at java.lang.Thread.run(Thread.java:539) I notice this problem when Tomcat is left unused for sometime also when a class when compiled is re-loaded by tomcat. since some property is not set its validation fails is sent back to form page with the errors highlighted. If I continue sending request or try to refresh the page it then gives the the following error Root Cause: java.lang.NoClassDefFoundError: sun/reflect/MethodAccessorImpl at sun.misc.Unsafe.defineClass(Native Method) at sun.reflect.ClassDefiner.defineClass(ClassDefiner.java:49) at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:384) at java.security.AccessController.doPrivileged(Native Method) at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:380) at sun.reflect.MethodAccessorGenerator.generateMethod(MethodAccessorGenerator.java:62) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:31) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:28) at java.lang.reflect.Method.invoke(Method.java:327) at com.co.util.FormUtil.populateBean(FormUtil.java:66) at com.co.util.FormUtil.populateBean(FormUtil.java:18) at AuthenticationServlet.doGet(Unknown Source) at AuthenticationServlet.doPost(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at MVCServlet.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.servlets.InvokerServlet.serveRequest(Unknown Source) at org.apache.catalina.servlets.InvokerServlet.doPost(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at
