id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
212646769,MDU6SXNzdWUyMTI2NDY3Njk=,1302,Opening multiple OpenDAP paths with open_mfdataset fails,319297,closed,0,,,5,2017-03-08T06:12:09Z,2019-03-10T12:53:34Z,2019-03-10T12:53:34Z,NONE,,,,"I'm trying to open multiple NetCDF files hosted on OpenDAP on a THREDDS server, using `xarray.open_mfdataset()`, but I get an error. If I open only one file (but still with `open_mfdataset()`), it works, if I open two, it doesn't.

For example, this works just fine:

    import xarray as xr
    chunks = {'time' : 1, 'depth' : 1}
    paths  = [
        'http://thredds.met.no/thredds/dodsC/fou-hi/norkyst800m-1h/NorKyst-800m_ZDEPTHS_his.an.2017022000.nc',
        ]
    d = xr.open_mfdataset(paths, chunks = chunks)

while this doesn't:

    import xarray as xr
    chunks = {'time' : 1, 'depth' : 1}
    paths  = [
        'http://thredds.met.no/thredds/dodsC/fou-hi/norkyst800m-1h/NorKyst-800m_ZDEPTHS_his.an.2017022000.nc',
        'http://thredds.met.no/thredds/dodsC/fou-hi/norkyst800m-1h/NorKyst-800m_ZDEPTHS_his.an.2017022100.nc',
        ]
    d = xr.open_mfdataset(paths, chunks = chunks)

I'm running this in a jupyter notebook, and I don't get any output in the notebook, it just keeps running, while in the terminal it prints the following 

    CURL Error: Failed initialization
    curl error details:
    CURL Error: Failed initialization
    CURL Error: Failed initialization
    CURL Error: Failed initialization
    syntax error, unexpected WORD_WORD, expecting SCAN_ATTR or SCAN_DATASET or SCAN_ERROR
    context: !�zF^@L������@L�Ы�J�@L�y@L�G`Lp@L�X�ڭ@L�/��a@L���@L��{�:@@L�Hl�D@L���i@L�f���@L�>����@L�x��f@L��DA�h@L�����@L��ڭ�M@L�u���@M
    CURL Error: Failed initialization
    curl error details:
    CURL Error: Failed initialization
    CURL Error: Failed initialization
    syntax error, unexpected WORD_WORD, expecting $end
    context: Dataset { Structure { Float64 lon[Y = 902][X = 2602]; } lon;} fou-hi/norkyst800m-1h/NorKyst-800m_ZDEPTHS_his.an.2017022100.nc;Data^:
    CURL Error: Failed initialization
    CURL Error: Failed initialization
    CURL Error: Failed initialization
    syntax error, unexpected WORD_WORD, expecting SCAN_ATTR or SCAN_DATASET or SCAN_ERROR
    context: �@��&��D^@�h�N�{@��I$�@B�

and from there on, it just degenerates into printing more garbage.

Isn't this supposed to work just fine?

I'm not sure if this is relevant, as I don't know if xarray and netCDF4 use the same backends, but in any case, the following works just fine. At least that suggests the problem isn't at the server side.


    import netCDF4 as nc
    d = nc.MFDataset([
        'http://thredds.met.no/thredds/dodsC/fou-hi/norkyst800m-1h/NorKyst-800m_ZDEPTHS_his.an.2017022000.nc',
        'http://thredds.met.no/thredds/dodsC/fou-hi/norkyst800m-1h/NorKyst-800m_ZDEPTHS_his.an.2017022100.nc',
    ])

I'm running xarray version 0.9.1, and netCDF4 version 1.2.4, and python 3.5.1, all installed with Anaconda, on a Mac.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/1302/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed,13221727,issue