I have a Struts / Tomcat 5 setup and I use the same JDK 1.4.1 to compile classes as Tomcat uses to run.
I have the following code in the action class DBConnectionFactory db = (DBConnectionFactory)getServlet().getServletContext().getAttribute("db"); Connection c = db.getConnection(); c.setCatalog("cat"); Statement s = c.createStatement(); ResultSet rs = s.executeQuery("SELECT * FROM Users"); ... c.close(); s.close(); rs.close(); And in the JSP DBConnectionFactory db = (DBConnectionFactory)application.getAttribute("db"); Connection c = db.getConnection(); c.setCatalog("cat"); Statement s = c.createStatement(); ResultSet rs = s.executeQuery("SELECT * FROM Users"); ... c.close(); s.close(); rs.close(); The JSP version runs just fine and I get a list of users. In the class, I get the following error, and I seem to have narrowed it down to using the ResultSet. I have recompiled ALL my code with the same JDK that Tomcat is using. In any case, it works in the JSP. Any ideas? ResultSet rs = s.executeQuery("SELECT * FROM Users"); SEVERE: An exception or error occurred in the container during the request processing java.lang.IncompatibleClassChangeError: org.apache.log4j.spi.ThrowableInformation at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1265) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1225) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315) at org.apache.log4j.spi.LoggingEvent.<init>(LoggingEvent.java:145) at org.apache.log4j.Category.forcedLog(Category.java:372) at org.apache.log4j.Category.log(Category.java:864) at org.apache.commons.logging.impl.Log4JLogger.error(Log4JLogger.java:192) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:287) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:562) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:974) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:205) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:562) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:974) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:177) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:562) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:974) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:156) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:562) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:974) at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:203) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:637) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:488) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:568) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:631) at java.lang.Thread.run(Thread.java:536) <FONT SIZE=1 FACE="VERDANA,ARIAL" COLOR=BLUE> ------------------------------------------------------- QAS Ltd. Developers of QuickAddress Software <a href="http://www.qas.com">www.qas.com</a> Registered in England: No 2582055 Registered in Australia: No 082 851 474 ------------------------------------------------------- </FONT> --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]