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http://issues.apache.org/bugzilla/show_bug.cgi?id=32952

           Summary: Internal server problem
           Product: Tomcat 4
           Version: 4.0.1 Final
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Servlet & JSP API
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: [EMAIL PROTECTED]


Does somebody know how to solve this problem:

Apache Tomcat/4.0.1 - HTTP Status 500 - Internal Server Error

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

type Exception report

message Internal Server Error

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

exception 

javax.servlet.ServletException: Cannot allocate servlet instance for 
path /servlet/bv.bv_question
        at org.apache.catalina.servlets.InvokerServlet.serveRequest
(InvokerServlet.java:415)
        at org.apache.catalina.servlets.InvokerServlet.doGet
(InvokerServlet.java:180)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationDispatcher.invoke
(ApplicationDispatcher.java:679)
        at org.apache.catalina.core.ApplicationDispatcher.doForward
(ApplicationDispatcher.java:431)
        at org.apache.catalina.core.ApplicationDispatcher.forward
(ApplicationDispatcher.java:355)
        at bv.start.forwardPage(start.java:96)
        at bv.start.doGet(start.java:31)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:247)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:243)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:201)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.valves.CertificatesValve.invoke
(CertificatesValve.java:246)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.core.StandardContext.invoke
(StandardContext.java:2344)
        at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:164)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.valves.ErrorDispatcherValve.invoke
(ErrorDispatcherValve.java:170)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:170)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.valves.AccessLogValve.invoke
(AccessLogValve.java:462)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:163)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.connector.http.HttpProcessor.process
(HttpProcessor.java:1011)
        at org.apache.catalina.connector.http.HttpProcessor.run
(HttpProcessor.java:1106)
        at java.lang.Thread.run(Thread.java:534)


root cause 

java.lang.UnsupportedClassVersionError: bv/bv_question (Unsupported major.minor 
version 8237.8195)
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
        at java.security.SecureClassLoader.defineClass
(SecureClassLoader.java:123)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal
(WebappClassLoader.java:1534)
        at org.apache.catalina.loader.WebappClassLoader.findClass
(WebappClassLoader.java:852)
        at org.apache.catalina.loader.WebappClassLoader.loadClass
(WebappClassLoader.java:1273)
        at org.apache.catalina.loader.WebappClassLoader.loadClass
(WebappClassLoader.java:1156)
        at org.apache.catalina.core.StandardWrapper.load
(StandardWrapper.java:801)
        at org.apache.catalina.core.StandardWrapper.allocate
(StandardWrapper.java:615)
        at org.apache.catalina.servlets.InvokerServlet.serveRequest
(InvokerServlet.java:396)
        at org.apache.catalina.servlets.InvokerServlet.doGet
(InvokerServlet.java:180)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationDispatcher.invoke
(ApplicationDispatcher.java:679)
        at org.apache.catalina.core.ApplicationDispatcher.doForward
(ApplicationDispatcher.java:431)
        at org.apache.catalina.core.ApplicationDispatcher.forward
(ApplicationDispatcher.java:355)
        at bv.start.forwardPage(start.java:96)
        at bv.start.doGet(start.java:31)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:247)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:243)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:201)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.valves.CertificatesValve.invoke
(CertificatesValve.java:246)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.core.StandardContext.invoke
(StandardContext.java:2344)
        at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:164)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.valves.ErrorDispatcherValve.invoke
(ErrorDispatcherValve.java:170)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:170)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.valves.AccessLogValve.invoke
(AccessLogValve.java:462)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:163)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.connector.http.HttpProcessor.process
(HttpProcessor.java:1011)
        at org.apache.catalina.connector.http.HttpProcessor.run
(HttpProcessor.java:1106)
        at java.lang.Thread.run(Thread.java:534)

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