Re: More on WCS and THREDDS 3.16.36

[John Caron <caron@xxxxxxxxxxxxxxxx>]

aha!

I think the problem is that the tomcat user (however tomcat is started) doesnt 
have write permission in the WCS cache directory:

      File dir = new File( getDiskCache().getRootDirectory());
      File tifFile = File.createTempFile("WCS", ".tif", dir);  <<< fails here

you may be using the default; to set it explicitly, use the "dir" element in WCS 
section of content/thredds/ThreddsConfig.xml, eg:

  <WCS>
    <allow>false</allow>
    <dir>/data/tmp/thredds/wcsCache/</dir>
    <scour>15 min</scour>
    <maxAge>30 min</maxAge>
  </WCS>

see:

http://www.unidata.ucar.edu/projects/THREDDS/tech/reference/ThreddsConfigXMLFile.html

We changed it in latest version because old way was not thread-safe, if 2 
requests for the same dataset came in at the same time.

let me know if that works...

Roy Mendelssohn wrote:
> Hi John:
>
> We have set up ftp files that should allow you to reproduce the error we 
> get.  This was set up on a different machine, that is very clean with 
> what is going on.  As before, the GetCapabilities works and the 
> DescribeCoverage works, but when I try to GetCoverage the file I get 
> back is:
>
> > <ServiceExceptionReport version='1.2.0'>
> >   <ServiceException code='Invalid Dataset'>
> > Permission denied
> >   </ServiceException>
> > </ServiceExceptionReport>
>
> The error in the Catalina.out file is:
>
> > 2008-06-18T10:59:24.409 -0700 [    809201][      29] INFO  - 
> > thredds.servlet.ServletUtil - Remote host: 161.55.17.185 - Request: 
> > "GET 
> > /thredds/wcs/satellite/BA/ssta/8day?request=GetCoverage&version=1.0.0&service=WCS&format=GeoTIFF&coverage=BAssta&Vertical=.0&time=2008-06-13T00:00:00Z&bbox=220,20,250,50 
> > HTTP/1.1"
> > 2008-06-18T10:59:24.576 -0700 [    809368][      29] INFO  - 
> > thredds.wcs.servlet.WCSServlet - makeServiceException
> > java.io.IOException: Permission denied
> >     at java.io.UnixFileSystem.createFileExclusively(Native Method)
> >     at java.io.File.checkAndCreate(File.java:1345)
> >     at java.io.File.createTempFile(File.java:1434)
> >     at thredds.wcs.WcsDataset.getCoverage(WcsDataset.java:202)
> >     at thredds.wcs.servlet.WCSServlet.doGet(WCSServlet.java:176)
> >     at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
> >     at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
> >     at 
> > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) 
> >
> >     at 
> > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) 
> >
> >     at 
> > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) 
> >
> >     at 
> > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174) 
> >
> >     at 
> > org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) 
> >
> >     at 
> > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
> >
> >     at 
> > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) 
> >
> >     at 
> > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) 
> >
> >     at 
> > org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) 
> >
> >     at 
> > org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874) 
> >
> >     at 
> > org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) 
> >
> >     at 
> > org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) 
> >
> >     at 
> > org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) 
> >
> >     at 
> > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) 
> >
> >     at java.lang.Thread.run(Thread.java:595)
> > 2008-06-18T10:59:24.577 -0700 [    809369][      29] INFO  - 
> > thredds.servlet.ServletUtil - Request Completed - 400 - -1 - 168
>
>
>
> There are two tar files - the first contains the entire catalog 
> structure - it will be obvious how to drill down to where the "Satellite 
> Datasets" are.  The second are the data files that are aggregated.  
> These are:
>
> ftp://orpheus.pfeg.noaa.gov/outgoing/ldewitt/thredds/Satellite.tar.gz
> ftp://orpheus.pfeg.noaa.gov/outgoing/ldewitt/thredds/BA.tar.gz
>
> My requests were:
>
> http://las.pfeg.noaa.gov:8082/thredds/wcs/satellite/BA/ssta/8day?request=DescribeCoverage&version=1.0.0&service=WCS&coverage=BAssta 
>
>
> http://las.pfeg.noaa.gov:8082/thredds/wcs/satellite/BA/ssta/8day?request=GetCoverage&version=1.0.0&service=WCS&format=GeoTIFF&coverage=BAssta&Vertical=.0&time=2008-06-13T00:00:00Z&bbox=220,20,250,50 
>
>
> I am not certain of the the last request, but a badly formed request 
> usually produces a much different error.
>
> HTH,
>
> -Roy
>
> **********************
> "The contents of this message do not reflect any position of the U.S. 
> Government or NOAA."
> **********************
> Roy Mendelssohn
> Supervisory Operations Research Analyst
> NOAA/NMFS
> Environmental Research Division
> Southwest Fisheries Science Center
> 1352 Lighthouse Avenue
> Pacific Grove, CA 93950-2097
>
> e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address)
> voice: (831)-648-9029
> fax: (831)-648-8440
> www: http://www.pfeg.noaa.gov/
>
> "Old age and treachery will overcome youth and skill."
> "From those who have been given much, much will be expected"