You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@tomcat.apache.org by Tuomas <tu...@mithlond.net> on 2007/08/13 19:41:24 UTC
suddenly I cannot run servlets anymore
Hi!
With the advice I got from
<http://www.coreservlets.com/Apache-Tomcat-Tutorial/tomcat-5.5.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-sun-1.6.0.00
$ 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@mithlond.net
http://tuope.mithlond.net
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
RE: suddenly I cannot run servlets anymore
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Tuomas [mailto:tuope@mithlond.net]
> Subject: RE: suddenly I cannot run servlets anymore
>
> I got my copy from
> http://tomcat.apache.org/download-55.cgi.
That's the proper place.
> Can file permissions play a role here?
Yes.
> Should *.class file be executable (for instance, 755)?
No, they are not directly executable; they're simply read by the JVM.
> Should all the class files I put in
> /usr/local/bin/tomcat/shared/classes, be owned by
> root?
It's a bad idea to run Tomcat (or any application) as root - too much
potential for doing accidental damage. Tomcat does need at least read
access to all files it will be accessing.
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
RE: suddenly I cannot run servlets anymore
Posted by Tuomas <tu...@mithlond.net>.
> Get rid of the CLASSPATH variable - it shouldn't be
> used. (For that
> matter, it never should have been invented.)
>
> Are you using a real Tomcat download, or some
> 3rd-party repackeged mess?
I got my copy from
http://tomcat.apache.org/download-55.cgi.
I shut down the computer, then turned it on again.
Issued
$ sudo sh /usr/local/bin/tomcat/bin/startup.sh. Bingo.
EVERYTHING is working again. I dont know why.
Can file permissions play a role here? Should *.class
file be executable (for instance, 755)? (I run Linux
(Ubuntu 7.04).)
$ ls -ld apache-tomcat-5.5.23/
drwxr-xr-x 11 root root 4096 2007-08-13 19:11
apache-tomcat-5.5.23/
*.class file are owned by my user account (tuope). My
umask settings give them a '-rw-------' permission
mode by default. Should all the class files I put in
/usr/local/bin/tomcat/shared/classes, be owned by
root?
Thanks for your time!
Tuomas
--
tuope@mithlond.net
http://tuope.mithlond.net
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
RE: suddenly I cannot run servlets anymore
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Tuomas [mailto:tuope@mithlond.net]
> Subject: suddenly I cannot run servlets anymore
>
> $ echo $CLASSPATH
> /usr/local/bin/tomcat/common/lib/jsp-api.jar:/usr/local/bin/to
> mcat/common/lib/servlet-api.jar:/home/tuope/src/web/servlets:.
Get rid of the CLASSPATH variable - it shouldn't be used. (For that
matter, it never should have been invented.)
Are you using a real Tomcat download, or some 3rd-party repackeged mess?
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org