SERVLET ERROR

SERVLET ERROR

message

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

exception

javax.servlet.ServletException: Error instantiating servlet class ServletDemo org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) java.lang.Thread.run(Thread.java:619)

root cause

java.lang.ClassNotFoundException: ServletDemo org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) java.lang.Thread.run(Thread.java:619)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.12 logs.

Apache Tomcat/7.0.12

View Answers

September 30, 2011 at 11:35 AM

Do servlet mapping in web.xml:

<servlet>
    <servlet-name>ServletDemo</servlet-name>
    <servlet-class>ServletDemo</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>ServletDemo</servlet-name>
    <url-pattern>/ServletDemo</url-pattern>
</servlet-mapping>

September 30, 2011 at 11:37 AM

Server is not getting the path of Servlet.Either the problem may be in servlet name or in servlet mapping.

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