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Simple application error

Varun Nayudu

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Posts: 160

posted 14 years ago

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I am getting this error message . I dont know what to do?

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: Wrapper cannot find servlet class com.servlet.registration or a class it depends on
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
	org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:793)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:702)
	org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:571)
	org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
	java.lang.Thread.run(Thread.java:619)

root cause

java.lang.ClassNotFoundException: com.servlet.registration
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1340)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1189)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
	org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:793)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:702)
	org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:571)
	org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
	java.lang.Thread.run(Thread.java:619)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.25 logs.

--------------------------------------------------------------------------------

Apache Tomcat/5.0.25

index.jsp

web.xml

servlet.java

SCJP 1.5, SCWCD 1.5

Ulf Dittmer

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Posts: 43081

posted 14 years ago

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Where is the file "registration.class"?

Assuming it is in WEB-INF/classes/com/servlet, have you restarted the web app since putting it there?

Varun Nayudu

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Posts: 160

posted 14 years ago

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Ulf Dittmer wrote:Where is the file "registration.class"?

Assuming it is in WEB-INF/classes/com/servlet, have you restarted the web app since putting it there?

I have tried to restart the web app , but no effect . Its still showing the same error message ..............

SCJP 1.5, SCWCD 1.5

Ulf Dittmer

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posted 14 years ago

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Have you looked at the log file, like the error message suggest?

Varun Nayudu

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posted 14 years ago

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Ulf Dittmer wrote:Have you looked at the log file, like the error message suggest?

This the log file

I even changed my folder from com.classes to just classes.servlet1
And made all the changes in the web.xml and jsp as well Still dont know what is the issue with this application from running

2010-01-16 20:34:42 StandardWrapperValve[servlet1.do]: Allocate exception for servlet servlet1.do
javax.servlet.ServletException: Wrapper cannot find servlet class classes.servlet1 or a class it depends on
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:964)
	at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:687)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:144)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
	at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:793)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:702)
	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:571)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
	at java.lang.Thread.run(Thread.java:619)
----- Root Cause -----
java.lang.ClassNotFoundException: classes.servlet1
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1340)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1189)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:954)
	at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:687)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:144)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
	at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:793)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:702)
	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:571)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
	at java.lang.Thread.run(Thread.java:619)

SCJP 1.5, SCWCD 1.5

William Brogden

Author and all-around good cowpoke

Posts: 13078

posted 14 years ago

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Like the error message says Tomcat cant find some essential class file.

A typical Tomcat installation includes a "class-loader-howto.html" file which explains in detail how Tomcat finds and loads classes. Study it.

IF your class name is registration (small initial character - bad practice, use initial Cap to keep classes clearly differentiated from packages)
THEN under WEB-INF/classes, tomcat expects a com subdirectory having a servlet subdirectory having a registration.class file.

Furthermore, under WEB-INF there must be the valid web.xml file.

Why did you try such odd-ball things as a com/classes directory or classes/servlet1 when the package appears to be "com.servlet"

Bill