[thredds] THREDDS, ncWMS and Java 7

• To: thredds community <thredds@xxxxxxxxxxxxxxxx>
• Subject: [thredds] THREDDS, ncWMS and Java 7
• From: Pauline Mak <Pauline.Mak@xxxxxxxxxxx>
• Date: Tue, 22 Jan 2013 00:00:58 +0000

Hi all,

I'm experiencing problems with a GetFeatureInfo request on THREDDS.

Here's the setup details:

java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.5) (6b24-1.11.5-0ubuntu1~12.04.1)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)

THREDDS Version 4.2.10 - 20120417.2151

Tomcat 7

I'm getting a null pointer exception when I make a GetFeatureInfo request for 
the CARS dataset, e.g. 

http://thredds.aodn.org.au/thredds/wms/climatology/CARS/2009/silicate_cars2009.nc?LAYERS=mean&ELEVATION=0&TIME=2013-01-22T10%3A48%3A24Z&TRANSPARENT=true&STYLES=boxfill%2Frainbow&CRS=EPSG%3A4326&COLORSCALERANGE=-50%2C50&NUMCOLORBANDS=20&LOGSCALE=false&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetFeatureInfo&EXCEPTIONS=XML&FORMAT=image%2Fpng&BBOX=-180%2C-133.125%2C180%2C148.125&I=228&J=242&INFO_FORMAT=text%2Fxml&QUERY_LAYERS=mean&WIDTH=512&HEIGHT=400&url=http%3A%2F%2Fthredds.aodn.org.au%2Fthredds%2Fwms%2Fclimatology%2FCARS%2F2009%2Fsilicate_cars2009.nc&server=http%3A%2F%2Fthredds.aodn.org.au%2Fthredds%2Fwms%2Fclimatology%2FCARS%2F2009%2Fsilicate_cars2009.nc

I get the following exception in threddsServlet.log (with all *wms debugging 
turned on)

2013-01-22T10:48:29.885 +1100 [   4393322][      92] ERROR - 
thredds.server.wms.ThreddsWmsController - dispatchWmsRequest(): Exception:
java.lang.NullPointerException
        at java.util.TreeMap.compare(TreeMap.java:1188)
        at java.util.TreeMap.put(TreeMap.java:531)
        at 
uk.ac.rdg.resc.ncwms.controller.AbstractWmsController.getFeatureInfo(AbstractWmsController.java:616)
        at 
thredds.server.wms.ThreddsWmsController.dispatchWmsRequest(ThreddsWmsController.java:181)
        at 
uk.ac.rdg.resc.ncwms.controller.AbstractWmsController.handleRequestInternal(AbstractWmsController.java:195)
        at 
org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
        at 
org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
        at 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
        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:621)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at 
thredds.servlet.filter.RequestQueryFilter.doFilter(RequestQueryFilter.java:122)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at 
thredds.servlet.filter.RequestPathFilter.doFilter(RequestPathFilter.java:105)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
        at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
        at 
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
        at 
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
        at 
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)

Interestingly…. If I downgrade the Java version to 1.6.0, it works fine.  Has 
anyone else seen this problem?  I've searched the mailing list, but failed to 
come up with anything useful.  Only seems to be an issue with the CARS dataset, 
and does work for, maybe one or two variables, but the majority is not working. 
 A fix for this would be great, but I can run Java 6 for now.  The dataset can 
be downloaded here:

http://thredds.aodn.org.au/thredds/catalog/climatology/CARS/catalog.html

I've tried something else too.  If I run ncWMS-1.0, using Tomcat 7 and Java 7 
(on laptop, running Mac OS X), GetFeatureInfo works properly! 

I'm really stumped for ideas, so any suggestions would be a great help.

Cheers,

-Pauline.

-- 
Pauline Mak
Programmer

AODN Development Office
University of Tasmania
Private Bag 21
HOBART TAS 7001

Ph:  (03) 6226 8586
Fax: (03) 6226 8575
pauline.mak@xxxxxxxxxxx

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  • Re: [thredds] THREDDS, ncWMS and Java 7
    • From: Marcos Hermida