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Re: More on WCS and THREDDS 3.16.36



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: address@hidden (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"


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