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
>>
>>
>>
>> _______________________________________________
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>> thredds@xxxxxxxxxxxxxxxx
>> For list information or to unsubscribe, visit:
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>
> _______________________________________________
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--
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
