RE: The 4.0b5 doesn't recognize a servlet class

Vernon Wu Wed, 18 Jul 2001 11:35:58 -0700

Hi,

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:

Catalina.start: LifecycleException: start: : java.lang.NoSuchMethodError
LifecycleException: start: : java.lang.NoSuchMethodError
at org.apache.catalina.loader.StandardLoader.start(StandardLoader.java:6
49)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1100)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:3
189)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)

        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:278
)
        at org.apache.catalina.core.StandardService.start(StandardService.java:3
53)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:458
)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:725)
        at org.apache.catalina.startup.Catalina.execute(Catalina.java:647)
        at org.apache.catalina.startup.Catalina.process(Catalina.java:177)
        at java.lang.reflect.Method.invoke(Native Method)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:196)
----- Root Cause -----
java.lang.NoSuchMethodError
        at org.apache.catalina.loader.StandardLoader.start(StandardLoader.java:6
27)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1100)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:3
189)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)

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:

Exception Report:

javax.servlet.ServletException: Class org.apache.jasper.servlet.JspServlet is not a Servlet

...

Root Cause:
java.lang.ClassCastException: org.apache.jasper.servlet.JspServlet
...
Please advise what steps I shall take
 
Thanks.

----Original Message Follows----

From: Wells Tiedeman <[EMAIL PROTECTED]>

Reply-To: [EMAIL PROTECTED]

To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]>

Subject: RE: The 4.0b5 doesn't recognize a servlet class

Date: Tue, 17 Jul 2001 16:06:10 -0400

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Any of the jars/classes containing the packages java.*, com.sun.*, javax.*,

etc. If any of these are included in your /WEB-INF/lib directory the class

loaders get confused.

-Wells

-----Original Message-----

From: Vernon Wu [mailto:[EMAIL PROTECTED]]

Sent: Tuesday, July 17, 2001 3:49 PM

To: [EMAIL PROTECTED]

Subject: The 4.0b5 doesn't recognize a servlet class

Hi, Wells,

Thanks for your response.

It took me awhile trying to figure how the CLASSPATH relates with the

problem. I build up the JSP application using Tomcat 3.x with the standard

procedure. Nothing inside the project is set up in the CLASSPATH. I don't

know what you means by "all j2ee platform classes". Are the classes used

j2ee APIs?

Thx.

Vernon

----Original Message Follows----

From: Wells Tiedeman

Reply-To: [EMAIL PROTECTED]

To: "'[EMAIL PROTECTED]'"

Subject: RE: ServletException in 4.0b5

Date: Tue, 17 Jul 2001 08:46:44 -0400

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

class loaders have been introduced in V4.0 to implement the requirements

found in Section 9.6.2 of the Servlet 2.3 Spec. These class loaders are

used to load all of the jars and classes rather than using the CLASSPATH.

I was able to resolve this problem as follows :

- Add all supporting jars for your web application (except J2EE jars) to

the /WEB-INF/lib directory rather than including them in the CLASSPATH

- Add all of the required classes for your web application to the

/WEB-INF/classes directory rather than including them in the CLASSPATH

- Add the j2ee.jar from the /j2sdkee1.3/lib directory to the

TOMCAT_HOME/common/lib directory. All J2EE platform classes must be placed

in the common/lib or common/classes directories rather than with the web

application.

-Wells

Wells Tiedeman

YOUcentric, Inc.

P: 704.401.1109

F: 704.401.1240

[EMAIL PROTECTED]

For more information on YOUcentric, please visit our web site at

www.youcentric.com

-----Original Message-----

From: Vernon Wu [mailto:[EMAIL PROTECTED]]

Sent: Monday, July 16, 2001 7:53 PM

To: [EMAIL PROTECTED]

Subject: ServletException in 4.0b5

I move one our small JSP application from 3.x to 4.0b5 for the reason of

using servlet 2.3 specification: ServletContextListener, HttpSessionListener

be more specific.

I get the exception under the 4.0b5 with the following messages:

Exception Report:

javax.servlet.ServletException: Class abc.control.ControllerServlet is not a

Servlet

....

Root Cause:

java.lang.ClassCastException: abc.control.ControllerServlet

...

There is not any indication that anywhere my code is not approprt. What I

shall do at this situation?

I believe that I encounter the similar situation in the 3.x, and it can be

resolved by recycle the Tomcat server. That method doesn't work for 4.0b5.

Thanks.

Vernon

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RE: The 4.0b5 doesn't recognize a servlet class

Exception Report:

Root Cause:

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