Hi Jon,
Sounds good. I'll grab that change and get a snapshot of TDS out on Monday.
Ethan
On 4/15/2011 10:10 AM, Jon Blower wrote:
> Hi Roland, all,
>
> I think I know what's going on here. The WMS code uses different strategies
> to read data from disk, depending upon whether the data are
> compressed/uncompressed, local/remote. It probably can't figure out a
> strategy for this "virtual" dataset. I didn't anticipate this so apologies
> for the unhelpful error message.
>
> I'm pretty sure the error is precisely here:
> http://www.resc.rdg.ac.uk/trac/ncWMS/browser/branches/tds4.2-20101102/src/java/uk/ac/rdg/resc/ncwms/cdm/CdmUtils.java#L221
>
> String fileType = nc.getFileTypeId();
> return fileType.equals("netCDF") || fileType.equals("HDF4")
> ? DataReadingStrategy.SCANLINE
> : DataReadingStrategy.BOUNDING_BOX;
>
> I guess getFileTypeId() returns null in this case. Ethan, in the next bugfix
> release could you change this to:
>
> return "netCDF".equals(fileType)|| "HDF4".equals(fileType)
> ? DataReadingStrategy.SCANLINE
> : DataReadingStrategy.BOUNDING_BOX;
>
> I've just changed this on my tds-refactor branch of ncWMS (but not actually
> tested it!), so you (Ethan) might just be able to sync your code with mine.
> It's already changed on ncWMS trunk.
>
> Cheers, Jon
>
>
>
> --------------------------------------------------------------------------
> On Apr 15, 2011, at 8:30 AM, Roland Schweitzer wrote:
>
>> Hi,
>>
>> I'd like to take up this conversation again and really this is a question
>> for Jon Blower and the ncWMS folks.
>>
>> Benno reported privately that the previous example had a few problems with
>> just the raw data, so I've put up what I hope is a very simple example we
>> can use to work through the issues.
>>
>> The data URL is:
>> http://cirrus.handwx.com:8080/thredds/dodsC/examples/average.jnl
>> which consists of a monthly climatology and one transformed variable
>> (sst_average) a dynamically generated average of all 12 months of the sst
>> variable.
>>
>> We can plot the sst_average with our standard tools (Ferret, toolsUI, etc),
>> but the WMS request for GetCapabilities fails (just following the link in
>> the browser) with the following error.
>>
>> Jon, any suggestions for how to track down this error?
>>
>> Roland
>>
>> 2011-04-15T15:15:20.028 +0000 [ 14083][ 19] INFO -
>> thredds.server.wms.ThreddsWmsController - Remote host: 74.192.0.105 -
>> Request: "GET /thredds/wms
>> /examples/average.jnl?service=WMS&version=1.3.0&request=GetCapabilities
>> HTTP/1.1"
>> 2011-04-15T15:15:20.939 +0000 [ 14994][ 19] ERROR -
>> thredds.server.wms.ThreddsWmsController - dispatchWmsRequest(): Exception:
>> java.lang.NullPointerException
>> at
>> uk.ac.rdg.resc.ncwms.cdm.CdmUtils.getOptimumDataReadingStrategy(CdmUtils.java:221)
>> at thredds.server.wms.ThreddsDataset.<init>(ThreddsDataset.java:102)
>> at
>> thredds.server.wms.ThreddsWmsController.dispatchWmsRequest(ThreddsWmsController.java:164)
>
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