Re: [netcdf-java] ArrayIndexOutOfBoundsException reading from NcML/OPeNDAP dataset

• To: Jon Blower <jdb@xxxxxxxxxxxxxxxxxxxx>
• Subject: Re: [netcdf-java] ArrayIndexOutOfBoundsException reading from NcML/OPeNDAP dataset
• From: John Caron <caron@xxxxxxxxxxxxxxxx>
• Date: Mon, 12 Jan 2009 10:55:22 -0700

Hi Jon:

Can you give me the exact version.date on the jar? I did fix some bugs there 
recently. You could also try the release i made friday (4.0.29) and see if its 
still happening.

Jon Blower wrote:
> Hi all,
> 
> I'm getting a strange problem when reading data from a certain
> dataset.  The NcML is attached (it's from Rich Signell at USGS) and it
> essentially aggregates a few OPeNDAP endpoints.  The CDL for the
> variable in question looks OK:
> 
> short water_temp(time=32, depth=34, lat=561, lon=401);
>      :_CoordinateAxes = "time depth lat lon ";
>      :long_name = "Water Temperature";
>      :units = "degC";
>      :NAVO_code = 15; // int
>      :_FillValue = -30000s; // short
>      :missing_value = -30000s; // short
>      :scale_factor = 0.0010f; // float
>      :add_offset = 20.0f; // float
> 
> (generated using ToolsUI-4.0).  I can read the metadata from this
> variable without a problem.  However, when I try to read actual data I
> get a problem at the line:
> 
> GridDatatype subset = grid.makeSubset(null, null, tRange, zRange,
> yRange, xRange);
> 
> "grid" is a GridDatatype object representing the un-subsetted
> water_temp variable, whose shape is [32, 34, 561, 401] as expected.
> The values of the various Ranges at this point are:
>   tRange: 31:31
>   zRange: 0:0
>   yRange: 1:559
>   zRange: 1:399
> 
> These all look fine, and are within the range of the various axis
> lengths.  However I get the following exception:
> 
> java.lang.ArrayIndexOutOfBoundsException: 1
>       at 
> ucar.nc2.dataset.CoordinateAxis1D.readValues(CoordinateAxis1D.java:636)
>       at ucar.nc2.dataset.CoordinateAxis1D.doRead(CoordinateAxis1D.java:569)
>       at 
> ucar.nc2.dataset.CoordinateAxis1D.getCoordName(CoordinateAxis1D.java:116)
>       at ucar.nc2.dt.grid.GridCoordSys.makeTimes(GridCoordSys.java:1290)
>       at ucar.nc2.dt.grid.GridCoordSys.<init>(GridCoordSys.java:463)
>       at ucar.nc2.dt.grid.GeoGrid.subset(GeoGrid.java:750)
>       at ucar.nc2.dt.grid.GeoGrid.makeSubset(GeoGrid.java:757)
> 
>  I am using a very recent download of the netcdf-4.0.jar from the web.
>  Can anyone help?  Is this a problem in my code or is it a bug in
> nj4.0?
> 
> Thanks in advance,
> Jon
> 
> 
> 
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