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Error loading WebappClassLoader delegate: false

 
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If i give the url for example http://IPName/Servlet


then i 'm getting the error in log which is shown below.
though i had specified the servlet in web.xml


java.lang.ClassNotFoundException: com.XXX.YYY.Servlet
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at org.apache.catalina.core.StandardWrapper$1.run(StandardWrapper.java:1077)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1073)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:808)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
[Servlet] - Allocate exception for servlet ervlet
java.lang.ClassNotFoundException: XXXX.YYYY.Servlet
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at org.apache.catalina.core.StandardWrapper$1.run(StandardWrapper.java:1077)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1073)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:808)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

please help me to resolve this error ....
 
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Originally posted by elay Raja:
If i give the url for example http://IPName/Servlet



What is IPName? Can you be a little more specific?
 
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Originally posted by elay Raja:
then i 'm getting the error in log which is shown below.
though i had specified the servlet in web.xml


java.lang.ClassNotFoundException: com.XXX.YYY.Servlet


You need to add the mentioned class to the classpath. Loose classes are to be placed in /WEB-INF/classes and JAR files in /WEB-INF/lib.
 
Bauke Scholtz
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Oh, can you also please elaborate a bit more about the topic title? This sounds very like that you're facing this problem only after changing some setting to false or so.
 
elay Raja
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Let me explain now.....

I'm trying to upload a file from flash to servlet. I had written the flash code using Flex & Actionscript.For server side,i written one servlet to accept the upload file. I had mentioned the above servlet in web.xml.If i click the upload button in flash,i'm getting 500 response from http.

Then i look in to log file, i got the above exception:-

I checked in browser by typing the http://192.1.1.1/UploadServlet

I am getting servlet is not available,though i specified them in xml.I hope you will be clear about my problem now..

please help me....

java.lang.ClassNotFoundException: com.XXX.YYY.Servlet
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at org.apache.catalina.core.StandardWrapper$1.run(StandardWrapper.java:1077)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1073)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:808)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
[Servlet] - Allocate exception for servlet ervlet
java.lang.ClassNotFoundException: XXXX.YYYY.Servlet
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at org.apache.catalina.core.StandardWrapper$1.run(StandardWrapper.java:1077)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1073)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:808)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
[ December 21, 2008: Message edited by: elay Raja ]
 
Bauke Scholtz
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My 1st reply still stands: that class is missing in the classpath.
 
elay Raja
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Yes.You are correct.
Thanks for your reply.
 
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