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From "Kyle A. Boyd" <kb...@brit.com>
Subject Tomcat 5.0.27 -- Servlet.service() for servlet invoker threw exception
Date Thu, 05 Aug 2004 16:40:48 GMT
I recently upgraded from Tomcat 5.0.25 to Tomcat 5.0.27. Now at times my 
client application is getting a "500 Internal Server Error".

I found the following exception in localhost_log.2004-08-05.txt. Does 
anyone know what is causing the exception considering the same code 
works fine under Tomat 5.0.25.

2004-08-05 09:20:47 StandardWrapperValve[invoker]: Servlet.service() for 
servlet invoker threw exception
java.lang.AbstractMethodError
        at com.brit.MiniRIS.Servlet.DB.executeBatch(DB.java:423)
        at com.brit.MiniRIS.Servlet.UserDB.updateUser(UserDB.java:1395)
        at 
com.brit.MiniRIS.Servlet.MRISServlet.updateUser(MRISServlet.java:9249)
        at 
com.brit.MiniRIS.Servlet.MRISServlet.doPost(MRISServlet.java:2432)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at 
org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:419)
        at 
org.apache.catalina.servlets.InvokerServlet.doPost(InvokerServlet.java:169)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
        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.valves.RequestDumperValve.invoke(RequestDumperValve.java:169)
        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.ContainerBase.invoke(ContainerBase.java:929)
        at 
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
        at 
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:300)
        at 
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:374)
        at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:743)
        at 
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:675)
        at 
org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:866)
        at 
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
        at java.lang.Thread.run(Thread.java:479)

Thanks,
Kyle


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