Hi All,
Here is a brief follow-up on some new progress I've made on this problem:
Because of the error from TDS 4.2, I have returned to TDS 4.1 for now but at
least found a workaround for the _FillValue mismatch. Because FMRC is returning
NaN for _FillValue, I have set this to NaN with NcML in my TDS config file for
these datasets. As I stated below, this was not working for me at first because
I was making the modification within the aggregation tag. Placing this
modification prior to the aggregation tag instead now gives me the expected
results: the metadata on the TDS OPeNDAP page and the OPeNDAP output now both
have NaN for _FillValue so there is no longer a mismatch causing errors for me
in visualization applications such as LAS.
Cheers,
John Maurer
Hawaii Ocean Observing System (HiOOS)
----- Original Message -----
From: "John Maurer, IV" <jmaurer@xxxxxxxxxx>
Date: Thursday, June 17, 2010 4:10 pm
Subject: TDS 4.2 FMRC catalogInit error: Name is null
To: thredds@xxxxxxxxxxxxxxxx
> Hi All,
> I'm working with the latest development release of TDS (4.2) in order to take
> advantage of the FMRC refactor. However, I get an error for each of my FMRC
> datasets in my TDS catalogInit.log that says something like the following:
>
> readCatalog(): Exception on
> catalog=/usr/local/tomcat/content/thredds/idd/atm_mod.xml Name is null
> log=null catalog
> java.lang.NullPointerException: Name is null
>
> I do not see where "Name" is supposed to be used in the documentation, and I
> already have lower-case "name" settings in place. Any ideas what's going on
> here? I realize this is not a stable release yet, so my apologies if I'm
> jumping the gun. Here is the URL to our THREDDS catalog:
>
> http://oos.soest.hawaii.edu/thredds/catalog.html
>
> Go to "Ocean Model Output" or "Atmosphere Model Output" and you will get an
> HTTP Status 404 - Not Found that results from this problem.
>
> A little background on why I care:
>
> Because of the way FMRC used to work, I am getting NaN for _FillValue in my
> Best Time Series even though the source NetCDF dataset files have _FillValue
> set to 1.0E37 in their metadata. This discrepency is causing problems when
> displaying my data in LAS 7.1.1: the metadata say one thing, but TDS delivers
> another. I have tried using NcML to get the two in sync but without any
> success. From my understanding in talking with others, this is a known bug in
> TDS that will be fixed in 4.2. I have converted all my FMRC catalogs from the
> old datasetScan syntax to the new featureCollection syntax as described here:
> http://www.unidata.ucar.edu/projects/THREDDS/tech/tds4.2/reference/collections/FeatureCollections.html.
> I have attached one example.
>
> Thanks for your time!
> Cheers,
> John Maurer
> Hawaii Ocean Observing System (HiOOS)
