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Ran 23 Mar 2017 07:26PM UTC

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Committed 23 Mar 2017 07:20PM UTC coverage: 75.512% (-0.7%) from 76.189%

Job # CONDA_ENV=py27-min

Build Type

push

travis-ci

Committed by

shoyer

Commit Message

Fixes open_mfdataset too many open file error (#1198)

Includes testing to demonstrate an OSError associated
with opening too many files as encountered
using open_mfdataset.

Fixed for the following backends:
 * netCDF4 backend
 * scipy backend
 * pynio backend

Open/close operations on h5netcdf appear to have an
error associated with the h5netcdf library following
correspondence with @shoyer.
Thus, there are still challenges with h5netcdf;
hence, support for h5netcdf is currently disabled.

Note, by default `autoclose=False` for open_mfdataset so standard
behavior is unchanged unless `autoclose=True`.

This choice of default is to select standard xarray performance over
general removal of the OSError associated with opening too many files as
encountered using open_mfdataset.

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