[jetty-users] Jetty server periodically looses Freemarker template

[Paul Houle <ontology2@xxxxxxxxx>]

I have a Jetty Server that normally works well but hiccups every few
days,  causing a service to go down.  I could use some help tracking
the problem down.

This server has two web applications that live on two different
name-based virtual hosts,  each of these is packaged in a separate WAR
file.  One of these services runs like a champ and never has problems,
 even when the other one fails.  The problem goes away for a while if
I restart jetty.

When the one that fails fails,  I see this exception over and over
again in the logs:

2014-01-07 00:00:52.912:WARN:oejs.ServletHandler:qtp1562043751-17:
/adserver/ookaboo/14498892
java.io.FileNotFoundException: Template "ad160.ftl" not found.
        at freemarker.template.Configuration.getTemplate(Configuration.java:742)
        at freemarker.template.Configuration.getTemplate(Configuration.java:673)
        at org.springframework.web.servlet.view.freemarker.FreeMarkerView.getTemplate(FreeMarkerView.java:348)
        at org.springframework.web.servlet.view.freemarker.FreeMarkerView.getTemplate(FreeMarkerView.java:334)
        at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:283)
        at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:233)
        at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167)
        at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:263)
        at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
        at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:735)
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
        at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:698)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1509)
        at com.ontology2.adserver3.CorsFilter.doFilterInternal(CorsFilter.java:29)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1489)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:517)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:138)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:564)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:213)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1097)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:446)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:175)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1031)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:136)
        at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:200)
        at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:109)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
        at org.eclipse.jetty.server.Server.handle(Server.java:445)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:269)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:229)
        at org.eclipse.jetty.io.AbstractConnection$ReadCallback.run(AbstractConnection.java:358)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:601)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:532)
        at java.lang.Thread.run(Thread.java:744)

Any idea what I can do to track a problem like this down?


-- 
Paul Houle
Expert on Freebase, DBpedia, Hadoop and RDF
(607) 539 6254    paul.houle on Skype   ontology@xxxxxxxxx