issue_comments: 778838527

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https://github.com/pydata/xarray/issues/3961#issuecomment-778838527 https://api.github.com/repos/pydata/xarray/issues/3961 778838527 MDEyOklzc3VlQ29tbWVudDc3ODgzODUyNw== 2560426 2021-02-14T20:40:38Z 2021-02-14T20:40:38Z NONE

Also seeing this as of version 0.16.1.

In some cases, I need lock=False otherwise I'll run into hung processes a certain percentage of the time. ds.load() prior to to_netcdf() does not solve the problem.

In other cases, I need lock=None otherwise I'll consistently get RuntimeError: NetCDF: Not a valid ID.

Is the current recommended solution to set lock=False and retry until success? Or, is it to keep lock=None and use zarr instead? @dcherian 

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