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From "Vernon Wu" <v...@hotmail.com>
Subject RE: The 4.0b5 doesn't recognize a servlet class
Date Wed, 18 Jul 2001 19:00:09 GMT
<html><DIV>
<P>Hi, </P>
<P>&nbsp;</P>
<P>As you suggested, I moved the j2ee.jar from the web-inf\lib to common\lib. And then
I restarted the Tomcat 4.0b5. Here is what I got:</P>
<P>Catalina.start: LifecycleException:&nbsp; start: :&nbsp; java.lang.NoSuchMethodError<BR>LifecycleException:&nbsp;
start: :&nbsp; java.lang.NoSuchMethodError<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.loader.StandardLoader.start(StandardLoader.java:6<BR>49)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1100)</P>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.apache.catalina.core.StandardContext.start(StandardContext.java:3<BR>189)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)</P>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)</P>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:278<BR>)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.core.StandardService.start(StandardService.java:3<BR>53)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.core.StandardServer.start(StandardServer.java:458<BR>)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.startup.Catalina.start(Catalina.java:725)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.startup.Catalina.execute(Catalina.java:647)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.startup.Catalina.process(Catalina.java:177)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at java.lang.reflect.Method.invoke(Native Method)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:196)<BR>----- Root Cause
-----<BR>java.lang.NoSuchMethodError<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.loader.StandardLoader.start(StandardLoader.java:6<BR>27)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1100)</P>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.apache.catalina.core.StandardContext.start(StandardContext.java:3<BR>189)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)</P>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)</P>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:278<BR>)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.core.StandardService.start(StandardService.java:3<BR>53)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.core.StandardServer.start(StandardServer.java:458<BR>)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.startup.Catalina.start(Catalina.java:725)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.startup.Catalina.execute(Catalina.java:647)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.startup.Catalina.process(Catalina.java:177)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at java.lang.reflect.Method.invoke(Native Method)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:196)</P>
<P>&nbsp;</P>
<P>If I don't relocate the j2ee.jar file, when I try to open up the main page which
doesn't call any servlet instance. What I get is the followings:</P>
<H3>Exception Report:</H3><PRE>javax.servlet.ServletException: Class org.apache.jasper.servlet.JspServlet
is not a Servlet</PRE><PRE>...</PRE><PRE><H3>Root Cause:</H3><PRE>java.lang.ClassCastException:
org.apache.jasper.servlet.JspServlet</PRE><PRE>...<BR></PRE><PRE>Please
advise what steps I shall take</PRE><PRE>&nbsp;</PRE><PRE>Thanks.<BR></PRE></PRE></DIV>
<DIV></DIV>
<DIV></DIV>----Original Message Follows---- 
<DIV></DIV>From: Wells Tiedeman <JWTIEDEMAN@YOUCENTRIC.COM>
<DIV></DIV>Reply-To: tomcat-user@jakarta.apache.org 
<DIV></DIV>To: "'tomcat-user@jakarta.apache.org'" <TOMCAT-USER@JAKARTA.APACHE.ORG>
<DIV></DIV>Subject: RE: The 4.0b5 doesn't recognize a servlet class 
<DIV></DIV>Date: Tue, 17 Jul 2001 16:06:10 -0400 
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<DIV></DIV>From tomcat-user-return-41410-vwu0 Tue, 17 Jul 2001 13:11:00 -0700

<DIV></DIV>Mailing-List: contact tomcat-user-help@jakarta.apache.org; run by ezmlm

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<DIV></DIV>
<DIV></DIV>Any of the jars/classes containing the packages java.*, com.sun.*,
javax.*, 
<DIV></DIV>etc. If any of these are included in your /WEB-INF/lib directory the
class 
<DIV></DIV>loaders get confused. 
<DIV></DIV>
<DIV></DIV>-Wells 
<DIV></DIV>
<DIV></DIV>-----Original Message----- 
<DIV></DIV>From: Vernon Wu [mailto:vwu0@hotmail.com] 
<DIV></DIV>Sent: Tuesday, July 17, 2001 3:49 PM 
<DIV></DIV>To: tomcat-user@jakarta.apache.org 
<DIV></DIV>Subject: The 4.0b5 doesn't recognize a servlet class 
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>Hi, Wells, 
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>Thanks for your response. 
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>It took me awhile trying to figure how the CLASSPATH relates with the

<DIV></DIV>problem. I build up the JSP application using Tomcat 3.x with the standard

<DIV></DIV>procedure. Nothing inside the project is set up in the CLASSPATH. I
don't 
<DIV></DIV>know what you means by "all j2ee platform classes". Are the classes
used 
<DIV></DIV>j2ee APIs? 
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>Thx. 
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>Vernon 
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>----Original Message Follows---- 
<DIV></DIV>From: Wells Tiedeman 
<DIV></DIV>Reply-To: tomcat-user@jakarta.apache.org 
<DIV></DIV>To: "'tomcat-user@jakarta.apache.org'" 
<DIV></DIV>Subject: RE: ServletException in 4.0b5 
<DIV></DIV>Date: Tue, 17 Jul 2001 08:46:44 -0400 
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<DIV></DIV>From tomcat-user-return-41367-vwu0 Tue, 17 Jul 2001 05:52:26 -0700

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<DIV></DIV>I experienced the same problem. It's due to a class loader issue. Multiple

<DIV></DIV>class loaders have been introduced in V4.0 to implement the requirements

<DIV></DIV>found in Section 9.6.2 of the Servlet 2.3 Spec. These class loaders
are 
<DIV></DIV>used to load all of the jars and classes rather than using the CLASSPATH.

<DIV></DIV>I was able to resolve this problem as follows : 
<DIV></DIV>- Add all supporting jars for your web application (except J2EE jars)
to 
<DIV></DIV>the /WEB-INF/lib directory rather than including them in the CLASSPATH

<DIV></DIV>- Add all of the required classes for your web application to the 
<DIV></DIV>/WEB-INF/classes directory rather than including them in the CLASSPATH

<DIV></DIV>- Add the j2ee.jar from the /j2sdkee1.3/lib directory to the 
<DIV></DIV>TOMCAT_HOME/common/lib directory. All J2EE platform classes must be
placed 
<DIV></DIV>in the common/lib or common/classes directories rather than with the
web 
<DIV></DIV>application. 
<DIV></DIV>-Wells 
<DIV></DIV>Wells Tiedeman 
<DIV></DIV>YOUcentric, Inc. 
<DIV></DIV>P: 704.401.1109 
<DIV></DIV>F: 704.401.1240 
<DIV></DIV>jwtiedeman@youcentric.com 
<DIV></DIV>For more information on YOUcentric, please visit our web site at 
<DIV></DIV>www.youcentric.com 
<DIV></DIV>-----Original Message----- 
<DIV></DIV>From: Vernon Wu [mailto:vwu0@hotmail.com] 
<DIV></DIV>Sent: Monday, July 16, 2001 7:53 PM 
<DIV></DIV>To: tomcat-user@jakarta.apache.org 
<DIV></DIV>Subject: ServletException in 4.0b5 
<DIV></DIV>I move one our small JSP application from 3.x to 4.0b5 for the reason
of 
<DIV></DIV>using servlet 2.3 specification: ServletContextListener, HttpSessionListener

<DIV></DIV>
<DIV></DIV>be more specific. 
<DIV></DIV>I get the exception under the 4.0b5 with the following messages: 
<DIV></DIV>Exception Report: 
<DIV></DIV>javax.servlet.ServletException: Class abc.control.ControllerServlet
is not a 
<DIV></DIV>
<DIV></DIV>Servlet 
<DIV></DIV>.... 
<DIV></DIV>Root Cause: 
<DIV></DIV>java.lang.ClassCastException: abc.control.ControllerServlet 
<DIV></DIV>... 
<DIV></DIV>There is not any indication that anywhere my code is not approprt.
What I 
<DIV></DIV>shall do at this situation? 
<DIV></DIV>I believe that I encounter the similar situation in the 3.x, and it
can be 
<DIV></DIV>resolved by recycle the Tomcat server. That method doesn't work for
4.0b5. 
<DIV></DIV>Thanks. 
<DIV></DIV>Vernon 
<DIV></DIV>_____ 
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