suddenly I cannot run servlets anymore

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suddenly I cannot run servlets anymore

suddenly I cannot run servlets anymore

2007-08-13 - By Tuomas

Back

Reply: 1 2 3 4

Hi!

With the advice I got from
<http://www.coreservlets.com/Apache-Tomcat-Tutorial/tomcat-5 (See http://cat-5.ora-code.com).5.html>,
I successfully installed Tomcat 5.5 on my computer
(Ubuntu 7.04). I verified that I can a) start the
server, b) access my own HTML and JSP pages, and c)
compile and run simple servlets.

I created a development dir in my home directory,
/home/tuope/src/web/servlets. I have created, too,
some shortcuts there:
catalina.sh -> /usr/local/bin/tomcat/bin/catalina.sh
shutdown.sh -> /usr/local/bin/tomcat/bin/shutdown.sh
startup.sh -> /usr/local/bin/tomcat/bin/startup.sh

Having done the tests mentioned above, I issued
$ sudo sh ./shutdown.sh
and then
$ sudo sh ./startup.sh

The result was that *I can no longer run any
servlets*. I get this message

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error
() that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Cannot allocate
servlet instance for path
/servlet/coreservlets.HelloServlet2

org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java
:389)

org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:134)

javax.servlet.http.HttpServlet.service(HttpServlet.java:690)

javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

root cause

java.lang.NoClassDefFoundError:
javax/servlet/http/HttpServlet
java.lang.ClassLoader.defineClass1(Native Method)

java.lang.ClassLoader.defineClass(ClassLoader.java:620)

java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)

java.net.URLClassLoader.defineClass(URLClassLoader.java:260)

java.net.URLClassLoader.access$000(URLClassLoader.java:56)

java.net.URLClassLoader$1.run(URLClassLoader.java:195)
java.security.AccessController.doPrivileged(Native
Method)

java.net.URLClassLoader.findClass(URLClassLoader.java:188)
java.lang.ClassLoader.loadClass(ClassLoader.java:306)

sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
java.lang.ClassLoader.loadClass(ClassLoader.java:251)

org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java
:1274)

org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java
:1205)

org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java
:370)

org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:134)

javax.servlet.http.HttpServlet.service(HttpServlet.java:690)

javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

note The full stack trace of the root cause is
available in the Apache Tomcat/5.5.23 logs.

I rebooted the computer. Didn't help.

$ echo $JAVA_HOME
/usr/lib/jvm/java-6 (See http://ava-6.ora-code.com)-sun-1 (See http://sun-1.ora-code.com).6.0.00
$ echo $CLASSPATH
/usr/local/bin/tomcat/common/lib/jsp-api.jar:/usr/local/bin/tomcat/common/lib
/servlet-api.jar:/home/tuope/src/web/servlets:.

Does anyone know what might be causing this odd
behavior? I am unarmed. :-(

Tuomas

--
tuope@(protected)
http://tuope.mithlond.net

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