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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 44086] New: - Bad errror reporting for abstract class as servlet
Date Mon, 17 Dec 2007 19:44:18 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=44086

           Summary: Bad errror reporting for abstract class as servlet
           Product: Tomcat 6
           Version: 6.0.14
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: minor
          Priority: P2
         Component: Catalina
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: miguel.griffa@gmail.com


When a servlet is an abstract class, an error will occur while trying to access
the servlet (not at initialization time, parse of web.xml) and no clear message
about the problem can be found, except this stack trace:

java.lang.InstantiationException
        at
sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:30)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at java.lang.Class.newInstance0(Class.java:355)
        at java.lang.Class.newInstance(Class.java:308)
        at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1104)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:981)
        at
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4045)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4351)
        at
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
        at
org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
        at
org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
        at
org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
        at
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
        at org.apache.catalina.core.StandardService.start(StandardService.java:516)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)


IMHO, I'd be desirable to have servlet classes validated for not being abstract

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