Nathan - the underlying data files are on both our TDS and our OPeNDAP Hyrax
server… the aggregation NCML currently points explicitly to the Hyrax service
endpoints.
Thanks to Bob Simmons, we see that at least one specific file in the
aggregation is failing. We determined that it is because a version 2 of the
file replaced the version 2 pointed to by the aggregation. The newer file has
a "v02" in the file name instead of the "v01"… there may be more failures but
suspect this is at the root of our problem… simply failing to ensure that our
aggregation NCMLs are always pointing to the most up-to-date files and file
names.
This failure explains why the data requests fail sometimes and not others… if
your requested time period doesn't include the updated files it works… if it
does then the request fails.
Ken
On Mar 25, 2013, at 12:19 PM, Nathan Potter <ndp@xxxxxxxxxxx> wrote:
>
>
> Li,
>
> It's odd this error you have. All of the source URL's are from an instance of
> the TDS, and work, at least to a certain extent. For example the second
> dataset's DDS can be seen with no problem here:
>
>
> http://data.nodc.noaa.gov/thredds/dodsC/testdata/ghrsst_ncml/fullAgg/aggregate__ghrsst_L4_GLOB_NCDC_AVHRR_AMSR_OI.ncml.dds
>
> Adding the constraint expression produces the correct result:
>
> http://data.nodc.noaa.gov/thredds/dodsC/testdata/ghrsst_ncml/fullAgg/aggregate__ghrsst_L4_GLOB_NCDC_AVHRR_AMSR_OI.ncml.dds?analysed_sst%5B0:1:1439%5D%5B360%5D%5B720%5D
>
> But the ASCII data request fails:
>
> http://data.nodc.noaa.gov/thredds/dodsC/testdata/ghrsst_ncml/fullAgg/aggregate__ghrsst_L4_GLOB_NCDC_AVHRR_AMSR_OI.ncml.ascii?analysed_sst%5B0:1:1439%5D%5B360%5D%5B720%5D
>
> (My requests for this URL time out with no response.)
>
> However the error you submitted:
>
>> Error {
>> code = 500;
>> message = "
>> http://data.nodc.noaa.gov/opendap/hyrax/ghrsst/L4/GLOB/NCDC/AVHRR_AMSR_OI/2003/348/20031214-NCDC-L4LRblend-GLOB-v01-fv01_0-AVHRR_AMSR_OI.nc.bz2
>> is not a valid URL, return status=404";
>> };
>>
>
> is unrelated to the TDS in that the referenced dataset URL:
> http://data.nodc.noaa.gov/opendap/hyrax/ghrsst/L4/GLOB/NCDC/AVHRR_AMSR_OI/2003/348/20031214-NCDC-L4LRblend-GLOB-v01-fv01_0-AVHRR_AMSR_OI.nc.bz2
>
> References a different dataset on an instance of a Hyrax server, not a TDS.
>
> I'm thinking there may be some copy/paste confusion happening that's mudding
> the waters here...
>
>
> Nathan
>
>
>
> On Mar 25, 2013, at 6:43 AM, Yuanjie Li - NOAA Affiliate wrote:
>
>> We are trying to pull out time series values in ASCII format through TDS.
>>
>> e.g.
>> http://data.nodc.noaa.gov/thredds/dodsC/testdata/ghrsst_ncml/fullAgg/aggregate__ghrsst_L4_GLOB_NCDC_AVHRR_AMSR_OI.ncml.ascii?analysed_sst[0:1:365][360][720]
>>
>> Worked fine..
>>
>> But when we tried:
>>
>> http://data.nodc.noaa.gov/thredds/dodsC/testdata/ghrsst_ncml/fullAgg/aggregate__ghrsst_L4_GLOB_NCDC_AVHRR_AMSR_OI.ncml.ascii?analysed_sst[0:1:1439][360][720]
>>
>> we got:
>>
>> Error {
>> code = 500;
>> message = "
>> http://data.nodc.noaa.gov/opendap/hyrax/ghrsst/L4/GLOB/NCDC/AVHRR_AMSR_OI/2003/348/20031214-NCDC-L4LRblend-GLOB-v01-fv01_0-AVHRR_AMSR_OI.nc.bz2
>> is not a valid URL, return status=404";
>> };
>>
>> Please advise us if this is a problem with our TDS server?
>>
>> The version of our server: TDS 4.2.9
>>
>> Thanks in advance,
>> Li
>> _______________________________________________
>> thredds mailing list
>> thredds@xxxxxxxxxxxxxxxx
>> For list information or to unsubscribe, visit:
>> http://www.unidata.ucar.edu/mailing_lists/
>
> = = =
> Nathan Potter ndp at opendap.org
> OPeNDAP, Inc. +1.541.231.3317
>
>
>
>
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