[thredds] over written file has old global attributes

[John Caron]

The other possibility is caching in your browser. It can be tricky to be absolutely sure you are getting a fresh copy. I like using the "Live HTTP Headers" plugin for firefox. But perhaps Shift-Refresh might work also. An independent test is the ToolsUI application, which never caches:

  http://www.unidata.ucar.edu/software/netcdf-java/v2.2/webstart-dev/index.html

If you still see the problem, then it is caching on the server. It occurs to me that "overwriting the file" may be the problem. You should be writing a new file, and deleting the old. What exactly are you doing?

Roy Mendelssohn wrote:
> Hi jean: '
> 
> My guess is you are getting the cached information, which hasn't been  
> updated.  You can set the frequency of update in the catalog xml  
> file.  Also, usually if you touch the file  (i.e. do something that  
> causes to Thredds to access the data( that  usually also updates the  
> info.
> 
> -Roy M.
> 
> 
> On Nov 5, 2007, at 4:51 PM, Jean.C.Newman at noaa.gov wrote:
> 
>> I have a set of netcdf files that are being accessed via OpenDAP  
>> and are
>> regularly overwritten. Most of the files, 29 sets of 31, update  
>> correctly
>> but in 2 file sets the "Global Attributes" don't update to the new
>> information although the "data" does. "ncdump -h" shows the correct
>> information, :history = "MOST v2.080 11-05-2007  16:09:22" ;
>>               :title = "Aleutian-Cascadia: Mwt 8.4, 21.00*b65" ;
>>   in the headers but when I look at it in a browser,
>> http://sift.pmel.noaa.gov/thredds/dodsC/data/crescent_runup_ha.nc.html
>> I see the old file attributes,
>> history: "MOST v2.080 11-05-2007  11:49:33"
>> title: "Aleutian-Cascadia: Mwt 8.5, 29.00*b25".
>> If I restart tomcat then the correct information shows up.
>> I'm new at thredds so I may very well be doing something stupid but I
>> could find no information. Below is the change I made to
>> $tomcat_home/content/thredds/catalog.xml. Any suggestion?
>> Thank you, Jean
>> <service name="ncdods" serviceType="OpenDAP" base="/thredds/dodsC/" />
>>    <datasetScan name="MOST tsunami model data" ID="mostDatasetScan"
>>         path="sims" location="/home/tg15/data/sims"  
>> serviceName="ncdods">
>>      <metadata inherited="true">
>>        <serviceName>ncdods</serviceName>
>>      </metadata>
>>      <filter>
>>        <include wildcard="*.nc"/>
>>      </filter>
>>      <sort>
>>        <lexigraphicByName increasing="true" />
>>      </sort>
>>    </datasetScan>
>>   ___________________________________________________________
>>    Jean Newman                             Tel: 206-526-6531
>>    NOAA Center for Tsunami Research
>>    NOAA/PMEL/OERD2 - UW/JISAO              FAX: 206-526-6485
>>    7600 Sand Point Way NE, Bldg. 3    jean.c.newman at noaa.gov
>>    Seattle, WA 98115-6349               jcn at u.washington.edu
>>   _________________________. URL: http://nctr.pmel.noaa.gov/
>>                           (__________________________________
>> _______________________________________________
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> 
> **********************
> "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 at noaa.gov (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."
> 
> 
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