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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) > > _______________________________________________ > thredds mailing list > thredds@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/
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