webMathematica™ Wolfram - Wolfram Research

186 webMathematica User Guidedocumentation. If the log file is empty, it may indicate that the user running the servlet containerdoes not have permission to write to the log file directory.The log file records serious errors; if your system does not function correctly at startup time, itwould be good to look here. For example, if the configuration file is not found or the kernelcannot be launched, this will be recorded in the log file. Later, if there is a serious error thatrequires shutting down a kernel, this is also recorded.Note that the server logs do not show webMathematica specific logging. This comes in thewebMathematica logging system.The Kernel MonitorThe kernel monitor is a servlet that collects information on the running of your site. You shouldbe able to find the monitor via the URL http://localhost:8080/webMathematica/Resources/Tools/KernelMonitor.jsp. (You may have some different URL for accessing your server.) Uponaccess, the monitor brings up a page showing the current status of webMathematica, describingvarious parameters of the site, and giving status information for each kernel. If you look at thispage, access some JSPs, and then look at the page again, you should see updates, such as achange in the number of times kernels have been accessed.For security purposes it would be sensible to restrict access to the kernel monitor. If the servletengine is accessed via an Apache web server, access can be restricted in the server configurationfiles. The section on Apache and Tomcat describes how this can be done.Reporting ProblemsIf you have been unable to resolve your problem, and you are eligible for support, you shouldprepare the following information. The more detailed the information, the easier it will be totrack down the problem.1. The version of webMathematica you are using2. The version of Mathematica you are using3. Your computer operating system version (e.g., Windows 2000)4. The servlet engine you are using