Java Stack Traces

Java Stack Traces

• 1.
  Debugging with JavaStack Traces Daryl Banttari Analytics, Inc.
• 2.
  About Daryl ITProfessional since 1986 ColdFusion since 1997 Java since 2003 Allaire/Macromedia Consulting 2000-2005 Webapper (SeeFusion!) Current: Analytics, Inc.
• 3.
  Agenda Java andColdFusion What is a "Stack Trace"? Reading a Stack Trace Debugging with Stack Traces Gathering Stack Traces
• 4.
  Java and ColdFusionColdFusion is a Java J2EE Application Servlet Engine (JRun) ColdFusion (cfmservlet) Request Threads (your application)
• 5.
  Java Stack TracesSnapshot in Time Shows Calls, Not Data Multiple Needed to Show Motion
• 6.
  "jrpp-352" runnable atjava.lang.Double.parseDouble(Double.java:220)? at coldfusion.runtime.CFDouble.parseDouble(CFDouble.java:23)? at coldfusion.runtime.CfJspPage.internalIsBoolean(CfJspPage.java:707)? at coldfusion.runtime.CfJspPage._compare(CfJspPage.java:273)? at cfApplication2ecfm726408707._factor5(D:\Websites\redacted.com\Application.cfm:3)? at cfApplication2ecfm726408707.runPage(D:\Websites\redacted.com\Application.cfm:521)? at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:147)? at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:357)? at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:62)? at coldfusion.filter.CfincludeFilter.include(CfincludeFilter.java:30)? at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:93)? at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:48)? at coldfusion.filter.PathFilter.invoke(PathFilter.java:80)? at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:47)? at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28)? at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:35)? at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:43)? at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22)? at coldfusion.CfmServlet.service(CfmServlet.java:105)? at jrun.servlet.FilterChain.doFilter(FilterChain.java:86)? at com.seefusion.Filter.doFilter(Filter.java:49)? at com.seefusion.SeeFusion.doFilter(SeeFusion.java:1494)? at jrun.servlet.FilterChain.doFilter(FilterChain.java:94)? at jrun.servlet.FilterChain.service(FilterChain.java:101)? at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:91)? at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)? at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:249)? at jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:527)? at jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:192)? at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:348)? at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:451)? at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:294)? at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)?
• 7.
  Debugging with StackTraces Examples
• 8.
  Recognizing Stack ElementsJrun.* - Jrun Ignore: jrun.servlet.jrpp.ProxyEndpoint.readFully Suspect: jrun.servlet.jrpp.JrppOutputStream$SpillStream.write Coldfusion.* Functions: coldfusion.runtime.CfJspPage.* Tags: coldfusion.tagext.sql.QueryTag Probably Innocent Java java.util.* java.lang.* Suspicious Java java.net.* java.io.* Your Code! cfApplication2ecfm726408707.runPage(D:\Websites\redacted.com\Application.cfm:577)?
• 9.
  Gathering Stack TracesSeeFusion / SeeStack CF8 Enterprise Server Monitor jstack
• 10.
  Summary Stack Tracesare snapshots of threads Multiple traces may be needed to diagnose slow/hung threads Read thread stacks from bottom to top Look for code line numbers and keywords
• 11.
  Q&A Daryl BanttariAnalytics, Inc.