One of your servlet's methods is throwing an unchecked exception (very possibly, from the init() method itself), causing the container to trash the instance of your servlet and construct a new one (verify by printing out System.identityHashCode(this) in your log message), Most likely, your init(ServletConfig) doens't call super.init(sc) and some other method ultimately invoking GenericServlet.getServletConfig() is failing with a NPE, but the call comes from an odd spot and is being swallowed by tomcat instead of being logged, or is being logged at a threshold below that which is configured in logging.properties.
cheers, David. *David Bullock Machaira Enterprises Pty Ltd * PO Box 31 Canowindra NSW 2804 02 6344 1100 http://machaira.com.au/ On 23 October 2013 09:57, Richard Pierce <rpie...@empoweredbenefits.com>wrote: > The init() method of all of my servlets is being called every 10 seconds > or so. I verified this by adding a System.out to the init() methods of my > servlets. However, the server is not restarting- just init gets recalled, > even with no load on the box at all. I have no idea where to begin > debugging this, but it does appear to be affecting performance. > > The API states "The servlet container calls the init method exactly once > after instantiating the servlet." > > I added an instance and static variable to the servlet, to see whether the > init method was being called multiple times on the same instance or if new > instances were being created. > > Initialized: 1 times (local), 28 total (static); > Thead=http-127.0.0.1-51443-1 Time: Tue Oct 22 18:40:36 EDT 2013 > Initialized: 1 times (local), 29 total (static); > Thead=http-127.0.0.1-51443-1 Time: Tue Oct 22 18:40:41 EDT 2013 > Initialized: 1 times (local), 30 total (static); > Thead=http-127.0.0.1-51443-1 Time: Tue Oct 22 18:40:46 EDT 2013 > Initialized: 1 times (local), 31 total (static); > Thead=http-127.0.0.1-51443-1 Time: Tue Oct 22 18:40:51 EDT 2013 > > Obviously it is happening every 5 seconds, but WHAT is happening? > > > Tomcat version: Apache Tomcat/6.0.35 > OS: Linux version 2.6.18-194.11.3.el5 > > > Richard Pierce | Software Architect > Empowered Benefits > rpie...@empoweredbenefits.com<mailto:rpie...@empoweredbenefits.com> >
