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Re: [Fwd: Re: problems reading GFS data from NOMADS-HD; DConnect]

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  • Subject: Re: [Fwd: Re: problems reading GFS data from NOMADS-HD; DConnect]
  • Date: Mon, 19 Apr 2010 08:44:59 -0600
gerald, can you try hitting datasets on http://motherlode.ucar.edu/thredds/ and see if you have any problems? 

Gerald Spreitzhofer wrote:

Hi John,
Thanks for answering my mail last Friday that quickly. Problems still
persist, but it looks like they are not permanent (sometimes in between
GFS data can be read without problems). Maybe the error messages below
help (they were produced this morning around 8 UTC).
Best Regards, Gerald

===== Reading 3d-variable 58: pressfc=====
java.net.SocketException: Connection reset
        at java.net.SocketInputStream.read(SocketInputStream.java:168)
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
        at java.io.BufferedInputStream.read1(BufferedInputStream.java:222)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:277)
        at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:741)
        at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:702)
        at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:712)
        at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:583)
        at dods.dap.DConnect.openConnection(DConnect.java:174)
        at dods.dap.DConnect.getDataFromUrl(DConnect.java:380)
        at dods.dap.DConnect.getData(DConnect.java:339)
        at dods.dap.DConnect.getData(DConnect.java:522)
        at ucar.nc2.dods.DODSNetcdfFile.readDODSData(DODSNetcdfFile.java:536)
        at ucar.nc2.dods.DODSVariable.readDODSData(DODSVariable.java:497)
        at ucar.nc2.dods.DODSVariable.read(DODSVariable.java:393)
        at SEVIS.NetcdfUtil.readNcArrayLayer(NetcdfUtil.java:1846)
        at SEVIS.NetcdfUtil.readNcArray(NetcdfUtil.java:1708)
        at SEVIS.NetcdfUtil.readNcArray_0MedAdapted(NetcdfUtil.java:1659)
        at SEVIS.DODSReader.writeNcVariables(DODSReader.java:825)
        at SEVIS.DODSReader.createNetcdfFile(DODSReader.java:676)
        at SEVIS.DODSReader.<init>(DODSReader.java:159)
        at SEVIS.SuperDataFile.getDodsFile(SuperDataFile.java:2526)
        at SEVIS.SuperDataFile.getSpecifiedNetcdfFile(SuperDataFile.java:2344)
        at SEVIS.MainFrame.forecastUpdate(MainFrame.java:2131)
        at 
SEVIS.MainFrame.jButtonDataUpdate_actionPerformed(MainFrame.java:2163)


------------------------ Ursprüngliche Nachricht ------------------------
Betreff: Re: problems reading GFS data from NOMADS-HD; DConnect
Von:     "Glenn Rutledge" <address@hidden>
Datum:   Fr, 16.04.2010, 19:41
An:      "John Caron" <address@hidden>
Cc:      "Gerald Spreitzhofer" <address@hidden>
         address@hidden
--------------------------------------------------------------------------

Thanks John,
We don't seem to be experiencing any issues.  I've cc:ed Dan Swank here
and he might be able to track down this issue.
Regards, Glenn

John Caron said the following on 4/16/2010 1:01 PM:

Hi gerald: im not having any trouble with that URL. is it still
happening (11 am MST) ?

On 4/16/2010 10:15 AM, Gerald Spreitzhofer wrote:

Hi John,
I am operationally reading GFS 0.5deg data from the NOMADS-HD server via
DODS and the Java/NetCDF library. I did not change anything in my code
during the last couple of months, but recently (for instance the last 20
hours) there have been some errors reading data from there (see the
protocol below). I think I remember that there was a similar problem
last
fall, and the reason was a change in some security or firewall
setting on
NOMADS, just concerning this protocol. Do you know what the reason
for the
messages can be or who might be responsible? Thanks, Gerald


===== Reading 3d-variable 28: hgtsfc=====
DConnect getData failed; retry (1,100)
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20100415/gfs_hd_18z.dods?hgtsfc[5:5][250:299][704:719]

DConnect getData failed; retry (2,200)
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20100415/gfs_hd_18z.dods?hgtsfc[5:5][250:299][704:719]

DConnect getData failed; retry (3,400)
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20100415/gfs_hd_18z.dods?hgtsfc[5:5][250:299][704:719]

DConnect getData failed; retry (4,800)
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20100415/gfs_hd_18z.dods?hgtsfc[5:5][250:299][704:719]

DConnect getData failed; retry (5,1600)
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20100415/gfs_hd_18z.dods?hgtsfc[5:5][250:299][704:719]

DConnect getData failed; retry (1,100)
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20100415/gfs_hd_18z.dods?hgtsfc[0:0][250:299][0:66]

DConnect getData failed; retry (2,200)
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20100415/gfs_hd_18z.dods?hgtsfc[0:0][250:299][0:66]

DConnect getData failed; retry (3,400)
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20100415/gfs_hd_18z.dods?hgtsfc[0:0][250:299][0:66]

DConnect getData failed; retry (4,800)
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20100415/gfs_hd_18z.dods?hgtsfc[0:0][250:299][0:66]

DConnect getData failed; retry (5,1600)
http://nomads.ncep.noaa.gov:9090/dods/gfs_hd/gfs_hd20100415/gfs_hd_18z.dods?hgtsfc[0:0][250:299][0:66]




-----------------------------------------
Dr. Gerald Spreitzhofer, Researcher
Institute of Meteorology and Geophysics
University of Vienna
A-1090 Vienna, Althanstrasse 14, UZA2
Tel.: +43-1-4277-537 33
email: address@hidden
-----------------------------------------