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Hi Ethan, I haven't found out exactly how to duplicate the bug. It suddenly appears, and then disappears as suddenly. In case of failure, the access-log doesn't print the size of the returned message. There is no response header, and firefox wants to save a file containing "0\r\n\r\n", and it takes a while before I get a response. Tomcat version is apache-tomcat-6.0.20, java-version is: java version "1.6.0_17" Java(TM) SE Runtime Environment (build 1.6.0_17-b04) Java HotSpot(TM) 64-Bit Server VM (build 14.3-b01, mixed mode) Running on virtual machine (XEN) with Ubunut 8.04 amd64. This morning, the error even propagated to other web-applications on the same tomcat. The root-webapp is simply a static html-pages served by tomcat, and the complete response it returned now: 131 <html> <head> <title>Thredds@xxxxxx</title> <meta http-equiv="refresh" content="2;url=/thredds/catalog.html"> </head> <body> <h1>Thredds at met.no</h1> You will be redirected to the catalog-pages in 2s. If your browser doesn't support this, press <a href="/thredds/catalog.html">here</a>. </body> </html> 0 and the same error message in logs. These problems first appeared after using ncWMS. It might be a hardware or tomcat problem, since ncWMS is much more demanding, and load sometimes goes up to '20'. I will check this further. If somebody else will try with the same file, it can be downloaded at: http://pastebin.met.no/pastebin/cgi-bin/file?id=013b56d31d0773643db159512845c2a870238477/ice_conc_nh_200911291200_CF.nc Best regards, Heiko On 2010-02-18 04:19, Ethan Davis wrote: > Hi Heiko, > > I'm not having any luck duplicating this problem here. > > The IllegalStateException-s appear to be occurring at the same time as > the empty responses. Interesting that it is happening in the JSP engine; > in the full stack trace you can see that the request has already gone > through Spring and the TDS/ncWMS code (I've included a more complete > snip of the stack trace below). > > I'm not seeing anything in the TDS/ncWMS code that commits the respones > before it hands the ModelAndView to Spring for the hand off to the JSP > engine. > > What version of Tomcat and Java are you running? > > I'm not sure if the NullPointerException from geotools during startup is > related. However, it does sound familiar but I couldn't find any thing > TDS/ncWMS related through Google or in our support archives. Does this > sound familiar to anyone? > > Ethan > > More of the stack trace: >> Feb 15, 2010 4:59:58 PM org.apache.jasper.runtime.JspFactoryImpl >> internalGetPageContext >> SEVERE: Exception initializing page context >> java.lang.IllegalStateException: Cannot create a session after the response >> has been committed >> at org.apache.catalina.connector.Request.doGetSession(Request.java:2313) >> at org.apache.catalina.connector.Request.getSession(Request.java:2074) >> at >> org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:833) >> at >> javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:216) >> at >> org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:544) >> at >> org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:493) >> at >> org.apache.jasper.runtime.PageContextImpl._initialize(PageContextImpl.java:146) >> at >> org.apache.jasper.runtime.PageContextImpl.initialize(PageContextImpl.java:124) >> at >> org.apache.jasper.runtime.JspFactoryImpl.internalGetPageContext(JspFactoryImpl.java:107) >> at >> org.apache.jasper.runtime.JspFactoryImpl.getPageContext(JspFactoryImpl.java:63) >> at >> org.apache.jsp.WEB_002dINF.jsp.wms.capabilities_005fxml_jsp._jspService(capabilities_005fxml_jsp.java:73) >> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) >> at >> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374) >> at >> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) >> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) >> at >> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) >> at >> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) >> at >> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646) >> at >> org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551) >> at >> org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488) >> at >> org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:231) >> at >> org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:252) >> at >> org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1173) >> at >> org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:901) >> at >> org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809) >> at >> org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571) >> at >> org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501) >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) > > > On 2/15/2010 10:34 AM, Heiko Klein wrote: >> Hi, >> >> after running ncWMS on Thredds 4.1.3 (linux) for a while, the >> GetCapabilites document is sometimes empty, i.e. >> >> $ GET >> 'http://dev-vm188/thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities'|wc >> 6065 3509 155870 >> $ GET >> 'http://dev-vm188/thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities'|wc >> 6065 3509 155870 >> $ GET >> 'http://dev-vm188/thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities'|wc >> 2 1 5 >> $ GET >> 'http://dev-vm188/thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities'|wc >> 2 1 5 >> $ GET >> 'http://dev-vm188/thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities'|wc >> 2 1 5 >> $ GET >> 'http://dev-vm188/thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities'|wc >> 6065 3509 155870 >> >> >> This happened at approx 17:01. The access.log file shows: >> >> 157.249.26.172 - - [15/Feb/2010:17:01:00 +0000] "GET >> /thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities >> HTTP/1.1" 200 - "-" "lwp-request/2.08" >> 157.249.26.172 - - [15/Feb/2010:17:01:01 +0000] "GET >> /thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities >> HTTP/1.1" 200 - "-" "lwp-request/2.08" >> 157.249.26.172 - - [15/Feb/2010:17:01:01 +0000] "GET >> /thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities >> HTTP/1.1" 200 - "-" "lwp-request/2.08" >> 157.249.26.172 - - [15/Feb/2010:17:01:06 +0000] "GET >> /thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities >> HTTP/1.1" 200 155870 "-" "lwp-request/2.08" >> 157.249.26.172 - - [15/Feb/2010:17:01:08 +0000] "GET >> /thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities >> HTTP/1.1" 200 155870 "-" "lwp-request/2.08" >> 157.249.26.172 - - [15/Feb/2010:17:01:08 +0000] "GET >> /thredds/wms/osisaf/met.no/ice/ice_conc_nh_200911291200_CF.nc?service=WMS&version=1.3.0&request=GetCapabilities >> HTTP/1.1" 200 - "-" "lwp-request/2.08" >> >> >> The catalina.out file says very often: >> Feb 15, 2010 5:00:00 PM org.apache.jasper.runtime.JspFactoryImpl >> internalGetPage >> Context >> SEVERE: Exception initializing page context >> java.lang.IllegalStateException: Cannot create a session after the >> response has >> been committed >> at >> org.apache.catalina.connector.Request.doGetSession(Request.java:2313) >> at >> org.apache.catalina.connector.Request.getSession(Request.java:2074) >> at >> org.apache.catalina.connector.RequestFacade.getSession(RequestFacade. >> java:833) >> ... >> >> There is another NullPointerException during startup: >> Feb 15, 2010 4:01:32 PM org.geotools.util.WeakCollectionCleaner remove >> WARNING: NullPointerException >> java.lang.NullPointerException >> at >> org.geotools.referencing.cs.DefaultCoordinateSystemAxis.hashCode(Defa >> ultCoordinateSystemAxis.java:1250) >> at >> org.geotools.referencing.cs.AbstractCS.hashCode(AbstractCS.java:642) >> at >> org.geotools.referencing.crs.AbstractCRS.hashCode(AbstractCRS.java:17 >> 8) >> >> which might be due to 'jai' installation, which ncWMS complained about >> previously. >> >> I'm attaching the log-files. >> >> >> >> Best regards, >> >> Heiko >> >> >> >> _______________________________________________ >> thredds mailing list >> thredds@xxxxxxxxxxxxxxxx >> For list information or to unsubscribe, visit: >> http://www.unidata.ucar.edu/mailing_lists/ > > _______________________________________________ > thredds mailing list > thredds@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ -- Dr. Heiko Klein Tel. + 47 22 96 30 00 Development Section / IT Department Fax. + 47 22 69 63 55 Norwegian Meteorological Institute http://www.met.no P.O. Box 43 Blindern 0313 Oslo NORWAY
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