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Date: Tue, 10 Jan 2012 18:28:05 +0000 (GMT)
From: Alastair Baldwin <alastairgbaldwin@yahoo.co.uk>
Reply-To: Alastair Baldwin <alastairgbaldwin@yahoo.co.uk>
Subject: SEVERE: Allocate exception for servlet helloworld Apache-Tomcat
 7.0.23
To: "users@tomcat.apache.org" <users@tomcat.apache.org>
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Dear users=0A=0AI'm unable to get a Hello World Servlet running from my bro=
wser.=A0=0A=0AConfiguration:=0AWindows XP Version 2002 service pack 3=0AApa=
che-tomcat-7.0.23-windows-x86=0ACATALINA_HOME =3D c:\apache-tomcat-7.0.23-w=
indows-x86\apache-tomcat-7.0.23=0ACLASSPATH=3D=A0.;c:\apache-tomcat-7.0.23-=
windows-x86\apache-tomcat-7.0.23\servlet-api.jar=A0=0A=A0JAVA_HOME=3Dc:\Pro=
gram Files\jdk1.7.0=0A=0A=0Acompiling as javac HelloWorldServlet.java -cp C=
ATALINA_HOME/lib/servlet-api.jar=A0=0A=0AI manually copy =A0HelloWorldServl=
et.class=A0 to the apress directory under webapps=0A=0Aand the web.xml to w=
ebapps/apress/WEB-INF=0A=0AI start Tomcat from CATALINA_HOME\bin as catalin=
a start=0A=0AI get the following output:=0AJan 09, 2012 12:40:51 AM org.apa=
che.catalina.startup.HostConfig deployDirectory=A0=0AINFO: Deploying web ap=
plication directory C:\apache-tomcat-7.0.23-windows-x86\apache-tomcat-7.0.2=
3\webapps\apress=A0=0AINFO: Server startup in 1017 ms=A0=0A=0A=0AIn Google =
chrome I type:=A0=0Ahttp://localhost:8080/apress/hello.html=0A=0AI get the =
following output in my browser:=A0=0A=0A=0A-HTTP Status 500 -=A0=0Atype Exc=
eption report=A0=0Amessage=A0=0Adescription The server encountered an inter=
nal error () that prevented it from fulfilling this request.=A0=0Aexception=
=A0=0Ajavax.servlet.ServletException: Error instantiating servlet class Hel=
loWorldServlet=A0=0Aorg.apache.catalina.authenticator.AuthenticatorBase.inv=
oke(AuthenticatorBase.java:472)=A0=A0=0A=0A=0Aand this is the logs:=A0=0A=
=0AINFO: ContextListener: attributeAdded('org.apache.jasper.compiler.TldLoc=
ationsCache', 'org.apache.jasper.compiler.TldLocationsCache@4ded8e')=A0=0AJ=
an 09, 2012 12:40:49 PM org.apache.catalina.core.ApplicationContext log=A0=
=0AINFO: Marking servlet helloworld as unavailable=A0=0AJan 09, 2012 12:40:=
49 PM org.apache.catalina.core.StandardWrapperValve invoke=A0=0ASEVERE: All=
ocate exception for servlet helloworld=A0=0Ajava.lang.ClassNotFoundExceptio=
n: HelloWorldServlet=A0=0Aat org.apache.catalina.loader.WebappClassLoader.l=
oadClass(WebappClassLoader.java:1688)=A0=A0=0A=0A=0A=0AThanks in advance=0A=
=0AAlastair=A0=A0

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