Hi all,
I am using currently using Tomcat 4.1.12 for an application I have
developed. I have a report that displays a large list of records retrieved from
a database. The report is generated using a JSP. This operation seems to take a
very long time and I assumed initially the time was spent in the data
retrieval. However I have generated a number of stack traces while my
application is "hanging" and the thread creating the report seems to be
consistently waiting on a condition within the Jasper functionality. The
generated stack trace from the thread creating the report is as follows:
"Thread-6" daemon prio=5 tid=0x24f92788 nid=0x714 waiting on condition
[25afe000..25affd88]
at
org.apache.jasper.runtime.BodyContentImpl.reAllocBuff(BodyContentImpl.java:82)
at
org.apache.jasper.runtime.BodyContentImpl.write(BodyContentImpl.java:144)
at
org.apache.jasper.runtime.BodyContentImpl.write(BodyContentImpl.java:155)
at
org.apache.jasper.runtime.BodyContentImpl.print(BodyContentImpl.java:291)
at
org.apache.struts.util.ResponseUtils.writePrevious(ResponseUtils.java:184)
at
org.apache.struts.taglib.logic.IterateTag.doAfterBody(IterateTag.java:412)
at
org.apache.struts.taglib.nested.logic.NestedIterateTag.doAfterBody(NestedIterateTag.java:160)
at
org.apache.jsp.ViewInvoiceByProduct_jsp._jspService(ViewInvoiceByProduct_jsp.java:275)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:92)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:204)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:289)
at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:575)
at
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:498)
at
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:768)
at
org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:359)
at
org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:703)
at
org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:814)
at
org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:467)
at
org.apache.jsp.classicLayout_jsp._jspx_meth_tiles_insert_1(classicLayout_jsp.java:145)
at
org.apache.jsp.classicLayout_jsp._jspService(classicLayout_jsp.java:85)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:92)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:204)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:289)
at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:432)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:356)
at
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1033)
at
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:268)
at
org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:248)
at
org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:302)
at
org.apache.struts.action.RequestProcessor.processActionForward(RequestProcessor.java:401)
at
ie.mcps.framework.web.McpsiRequestProcessor.processActionForward(McpsiRequestProcessor.java:83)
at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279)
at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1339)
at
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:489)
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
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:527)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:380)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
at java.lang.Thread.run(Thread.java:534)
I have generated a number of thread dumps and each time Thread-6 is
waiting on the same condition until eventually the report is displayed. I am
currently executing the tests on my Windows 2000 machine.
I have tested the same functionality using Tomcat 5.5.9 and the report
is generated instantaneously. However it is not an option for me to update to
the latest version of Tomcat so I need to try find a way of resolving these
problems. Any ideas?
Cheers,
Leonard
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