Compression Filter Exceptions

[Lior Shliechkorn <li...@yahoo.com>]

Hello, I created a servlet that has a compression filter applied to it (from http://www.javaworld.com/javaworld/jw-06-2001/jw-0622-filters_p.html if anyone is interested). I get no errors generated, and the filter seems to be working on until I check the log for my webapp and I see all this errors that were thrown. The error from the file is below:---------------------------------------------------------------------------2003-04-22 16:05:42 /refcoapp/servlet/ZR/ProcessReport: 14521ms
2003-04-22 16:05:42 StandardWrapper[/refcoapp:org.apache.catalina.INVOKER.ZR]: Marking servlet org.apache.catalina.INVOKER.ZR as unavailable
2003-04-22 16:05:42 invoker: Cannot allocate servlet instance for path /refcoapp/servlet/ZR/images/grey_line.gif
javax.servlet.ServletException: Wrapper cannot find servlet class ZR or a class it depends on
 at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:873)
 at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:655)
 at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:407)
 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.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
 at kz.filters.compression.CompressionFilter.doFilter(CompressionFilter.java:53)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
 at kz.filters.AuthenticationFilter.doFilter(AuthenticationFilter.java:32)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
 at kz.filters.ConnectionFilter.doFilter(ConnectionFilter.java:82)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
 at kz.filters.TimerFilter.doFilter(TimerFilter.java:22)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
 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:190)
 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.StandardContext.invoke(StandardContext.java:2347)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
 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:468)
 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:174)
 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.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:371)
 at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:424)
 at java.lang.Thread.run(Thread.java:479)
----- Root Cause -----
java.lang.ClassNotFoundException: ZR
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1406)
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1254)
 at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:867)
 at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:655)
 at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:407)
 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.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
 at kz.filters.compression.CompressionFilter.doFilter(CompressionFilter.java:53)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
 at kz.filters.AuthenticationFilter.doFilter(AuthenticationFilter.java:32)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
 at kz.filters.ConnectionFilter.doFilter(ConnectionFilter.java:82)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
 at kz.filters.TimerFilter.doFilter(TimerFilter.java:22)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
 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:190)
 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.StandardContext.invoke(StandardContext.java:2347)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
 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:468)
 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:174)
 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.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:371)
 at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:424)
 at java.lang.Thread.run(Thread.java:479)
------------------------------------------------------------------- The first line shows me how long it took to process the servlet, which is correct (it's another filter I implemented to check the times for loading from the same url above), but then it should not try to load up the images as servlets. Any ideas why this is happening. Thank you,Lior


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