Servlet 2.2 conformity of web-app deployment?

Question

Hi,
          I am having quite a bit of difficulty getting a standard Servlet 2.2 app
          that runs in Resin, Tomcat and Orion app server just fine, to work at all on
          WebLogic. Is there some sort of trick? I installed WebLogic 5.1 trial via
          the download on my Win2K box. I set the weblogic.properties to use a webApp.
          When I hit the web-app via html pages..its fine. When I try to display JSP
          pages I get problems. I then figured out that for some reason WebLogic
          couldn't find tools.jar to compile JSP pages, so I added that to my System
          Environment classpath. Why it needs to be set there..and its not
          automatically done by the install I don't know. It seems obvious to me that
          to display JSP pages they have to be compiled, so tools.jar is needed.
          Anyways, the pages started converting into .java files, but when compiling I
          am getting some compile-time errors and thus the .class isn't showing up.
          I have:
          weblogic.httpd.webApp.myapp=c:/applications/bm/www
          in weblogic.properties. I am not trying clustering yet, so this is just to
          deploy a single instance of weblogic to run our site. I also commented out
          the docRoot=/public or whatever the line is..since I only want to run a
          Servlet 2.2 web-app, not a simple web-site.
          Below is the output of the console. I am not sure why it is giving me a
          class loader error. I am going to try the SP4 patch, but for some reason the
          wlconfig utility doesn't change the settings that I keep applying to it. I
          am trying to add a path to the classpath with wlconfig.
          Anyways..if anyone can shed some light I would be much appreciated.
          Thank you.
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: init
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param verbose
          ini
          tialized to: true
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          packagePref
          ix initialized to: jsp_servlet
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          compileComm
          and initialized to: javac
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          srcCompiler
          initialized to weblogic.jspc
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          superclass
          initialized to null
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          workingDir
          initialized to: C:\applications\bm\www\_tmp_war
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          pageCheckSe
          conds initialized to: 1
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp:
          initialization co
          mplete
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp:
          pageCheckSeconds over-ruled in JSPServlet to : 1
          Mon Aug 14 11:02:55 PDT 2000:<E> <ServletContext-myapp> error checking JSP
          'jsp_
          servlet._index' for freshness, forcing re-compile
          java.lang.LinkageError: Class javax/servlet/ServletConfig violates loader
          constr
          aints
          at java.lang.ClassLoader.defineClass0(Native Method)
          at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
          at java.lang.ClassLoader.defineClass(ClassLoader.java:426)
          at
          weblogic.utils.classloaders.GenericClassLoader.findLocalClass(Generic
          ClassLoader.java:415)
          at
          weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
          cClassLoader.java:316)
          at
          weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader$Slave.
          loadClass(RecursiveReloadOnModifyClassLoader.java:234)
          at
          weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
          Loader.java:146)
          at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
          at jsp_servlet._index._isStale(_index.java:45)
          at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:158)
          at
          weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.
          java:164)
          at
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          pl.java:99)
          at
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          pl.java:123)
          at
          weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          textImpl.java:742)
          at
          weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          textImpl.java:686)
          at
          weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
          ContextManager.java:247)
          at
          weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
          a:361)
          at
          weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:261)
          at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
          Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> Generated java file:
          C:\
          applications\bm\www\_tmp_war\jsp_servlet\_index.java
          Mon Aug 14 11:02:58 PDT 2000:<E> <ServletContext-myapp> Servlet failed with
          Exce
          ption
          java.lang.LinkageError: Class javax/servlet/ServletConfig violates loader
          constr
          aints
          at java.lang.ClassLoader.defineClass0(Native Method)
          at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
          at java.lang.ClassLoader.defineClass(ClassLoader.java:426)
          at
          weblogic.utils.classloaders.GenericClassLoader.findLocalClass(Generic
          ClassLoader.java:415)
          at
          weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
          cClassLoader.java:316)
          at
          weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader$Slave.
          loadClass(RecursiveReloadOnModifyClassLoader.java:234)
          at
          weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
          Loader.java:146)
          at
          weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader.findLo
          calClass(RecursiveReloadOnModifyClassLoader.java:109)
          at
          weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
          cClassLoader.java:316)
          at
          weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
          Loader.java:172)
          at
          weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
          Loader.java:146)
          at weblogic.servlet.jsp.OneOffJspLoader.loadClass(JspStub.java:429)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
          at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
          at jsp_servlet._index._jspService(_index.java:58)
          at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
          at
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          pl.java:105)
          at
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          pl.java:123)
          at
          weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          textImpl.java:742)
          at
          weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          textImpl.java:686)
          at
          weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
          ContextManager.java:247)
          at
          weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
          a:361)
          at
          weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:261)
          at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
          

Answer 1

Thanks. Playing with this now. The initial running does the same thing. I
          get the same ClassLoader problem. I sent you an email about editing these
          and I figured it out. Didn't find the .cmd files originally. Anyways,
          another problem I have..I had to set in the Win2K classpath the location of
          tools.jar. Is this not allowed to be distributed in the JRE? I am surprised
          if WebLogic (and other app servers too) need access to the javac compiler,
          why it is not part of JRE so they can access it. I set that in my
          environment. Are you saying I shouldn't need to set any environment
          variables..not to my WEB-INF\classes, \ib, or any JAVA dir? That instead I
          can just set it in the .cmd script to start the server?
          Lastly, I will need to run WebLogic as a service. I have a Java as NT
          service utility that works pretty easily..so can I just use that?
          Thanks.
          "Roberto Nanamura" <[email protected]> wrote in message
          news:[email protected]...
          > Hi Kevin,
          >
          > WebLogic should work just fine without setting any environment variables
          but
          > setting them in the startWebLogic.cmd script (I am supposing you are
          starting WL
          > through the command line). Look for the first lines in the
          startWebLogic.cmd
          > script like that:
          >
          > if "%JAVA_HOME%" == "" set JAVA_HOME=.\jre1_2\jre
          > set JAVA_HOME=.\jre1_2\jre
          >
          > And see if the JAVA_HOME is already set up and if the value is where your
          jre
          > 1.2 should be. That should take care of the 'tools.jar' problem.
          >
          > Try to run it again and see if the problem still persists.
          >
          > Hope this will help,
          >
          > Roberto N Nanamura
          > Technical Consultant
          > Summa Technologies
          >
          > Kevin Duffey wrote:
          > >
          > > Hi,
          > >
          > > I am having quite a bit of difficulty getting a standard Servlet 2.2 app
          > > that runs in Resin, Tomcat and Orion app server just fine, to work at
          all on
          > > WebLogic. Is there some sort of trick? I installed WebLogic 5.1 trial
          via
          > > the download on my Win2K box. I set the weblogic.properties to use a
          webApp.
          > > When I hit the web-app via html pages..its fine. When I try to display
          JSP
          > > pages I get problems. I then figured out that for some reason WebLogic
          > > couldn't find tools.jar to compile JSP pages, so I added that to my
          System
          > > Environment classpath. Why it needs to be set there..and its not
          > > automatically done by the install I don't know. It seems obvious to me
          that
          > > to display JSP pages they have to be compiled, so tools.jar is needed.
          > > Anyways, the pages started converting into .java files, but when
          compiling I
          > > am getting some compile-time errors and thus the .class isn't showing
          up.
          > >
          > > I have:
          > >
          > > weblogic.httpd.webApp.myapp=c:/applications/bm/www
          > >
          > > in weblogic.properties. I am not trying clustering yet, so this is just
          to
          > > deploy a single instance of weblogic to run our site. I also commented
          out
          > > the docRoot=/public or whatever the line is..since I only want to run a
          > > Servlet 2.2 web-app, not a simple web-site.
          > >
          > > Below is the output of the console. I am not sure why it is giving me a
          > > class loader error. I am going to try the SP4 patch, but for some reason
          the
          > > wlconfig utility doesn't change the settings that I keep applying to it.
          I
          > > am trying to add a path to the classpath with wlconfig.
          > >
          > > Anyways..if anyone can shed some light I would be much appreciated.
          > >
          > > Thank you.
          > >
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: init
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          verbose
          > > ini
          > > tialized to: true
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          > > packagePref
          > > ix initialized to: jsp_servlet
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          > > compileComm
          > > and initialized to: javac
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          > > srcCompiler
          > > initialized to weblogic.jspc
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          > > superclass
          > > initialized to null
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          > > workingDir
          > > initialized to: C:\applications\bm\www\_tmp_war
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp: param
          > > pageCheckSe
          > > conds initialized to: 1
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp:
          > > initialization co
          > > mplete
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> *.jsp:
          > > ######
          > > ########
          > > ############
          > > ##############
          > > pageCheckSeconds over-ruled in JSPServlet to : 1
          > > ##############
          > > ############
          > > ########
          > > ######
          > >
          > > Mon Aug 14 11:02:55 PDT 2000:<E> <ServletContext-myapp> error checking
          JSP
          > > 'jsp_
          > > servlet._index' for freshness, forcing re-compile
          > > java.lang.LinkageError: Class javax/servlet/ServletConfig violates
          loader
          > > constr
          > > aints
          > > at java.lang.ClassLoader.defineClass0(Native Method)
          > > at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
          > > at java.lang.ClassLoader.defineClass(ClassLoader.java:426)
          > > at
          > > weblogic.utils.classloaders.GenericClassLoader.findLocalClass(Generic
          > > ClassLoader.java:415)
          > > at
          > > weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
          > > cClassLoader.java:316)
          > > at
          > > weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader$Slave.
          > > loadClass(RecursiveReloadOnModifyClassLoader.java:234)
          > > at
          > > weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
          > > Loader.java:146)
          > > at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
          > > at jsp_servlet._index._isStale(_index.java:45)
          > > at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:158)
          > > at
          > > weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.
          > > java:164)
          > > at
          > > weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          > > pl.java:99)
          > > at
          > > weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          > > pl.java:123)
          > > at
          > > weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          > > textImpl.java:742)
          > > at
          > > weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          > > textImpl.java:686)
          > > at
          > > weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
          > > ContextManager.java:247)
          > > at
          > > weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
          > > a:361)
          > > at
          > > weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:261)
          > >
          > > at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
          > >
          > > Mon Aug 14 11:02:55 PDT 2000:<I> <ServletContext-myapp> Generated java
          file:
          > > C:\
          > > applications\bm\www\_tmp_war\jsp_servlet\_index.java
          > > Mon Aug 14 11:02:58 PDT 2000:<E> <ServletContext-myapp> Servlet failed
          with
          > > Exce
          > > ption
          > > java.lang.LinkageError: Class javax/servlet/ServletConfig violates
          loader
          > > constr
          > > aints
          > > at java.lang.ClassLoader.defineClass0(Native Method)
          > > at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
          > > at java.lang.ClassLoader.defineClass(ClassLoader.java:426)
          > > at
          > > weblogic.utils.classloaders.GenericClassLoader.findLocalClass(Generic
          > > ClassLoader.java:415)
          > > at
          > > weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
          > > cClassLoader.java:316)
          > > at
          > > weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader$Slave.
          > > loadClass(RecursiveReloadOnModifyClassLoader.java:234)
          > > at
          > > weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
          > > Loader.java:146)
          > > at
          > > weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader.findLo
          > > calClass(RecursiveReloadOnModifyClassLoader.java:109)
          > > at
          > > weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
          > > cClassLoader.java:316)
          > > at
          > > weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
          > > Loader.java:172)
          > > at
          > > weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
          > > Loader.java:146)
          > > at
          weblogic.servlet.jsp.OneOffJspLoader.loadClass(JspStub.java:429)
          > > at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
          > > at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
          > > at jsp_servlet._index._jspService(_index.java:58)
          > > at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
          > > at
          > > weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          > > pl.java:105)
          > > at
          > > weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          > > pl.java:123)
          > > at
          > > weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          > > textImpl.java:742)
          > > at
          > > weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          > > textImpl.java:686)
          > > at
          > > weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
          > > ContextManager.java:247)
          > > at
          > > weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
          > > a:361)
          > > at
          > > weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:261)
          > >
          > > at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)