Re: [thredds] Bad chunk sizes error with netcdf4 & ncss

• To: tom cook <tmcook@xxxxxxxx>
• Subject: Re: [thredds] Bad chunk sizes error with netcdf4 & ncss
• From: Sean Arms <sarms@xxxxxxxx>
• Date: Wed, 15 Aug 2018 16:48:59 -0600

Greetings Tom!

I'm not sure which version of netCDF-C the docker image uses, so that might
be an issue (Julien, do you know off the top of your head)?. More likely is
that there is a bug related to netCDF-4 file writing in the netCDF-Java
library, which relies on the netCDF-C library underneath. When you switch
to accept=netcdf, you are then using a pure java netCDF file writer to
produce a netCDF-3 file, and so the problematic code path isn't used.
Dennis - any ideas?

Cheers,

Sean


On Sun, Aug 12, 2018 at 12:00 PM Thomas Cook <tmcook@xxxxxxxx> wrote:

> HI
> I'm having an issue with Netcdf Subset and Netcdf4
> For instance, when I do the following
>
> http://hfrnet-tds.ucsd.edu/thredds/ncss/HFR/USWC/6km/hourly/RTV/HFRADAR_US_West_Coast_6km_Resolution_Hourly_RTV_best.ncd?var=u&var=v&north=35&west=-120&east=-116&south=31&horizStride=1&time=2018-08-12T15%3A00%3A00Z&addLatLon=true&accept=netcdf4
>
> I get
>
> NetCDF: Bad chunk sizes. nc_def_var_chunking on variable u
>
> If I replace "accept=netcdf" in the above URL, I get a valid dataset and
> all is good.
>
> I'm using the thredds-docker Version 4.6.12-SNAPSHOT -
> 2018-01-26T10:29:32+0000 image and not quite sure the best way at
> troubleshooting this.
>
> Thanks
> Tom
>
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