issues: 638241779

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association pull_request body repo type active_lock_reason
638241779 MDU6SXNzdWU2MzgyNDE3Nzk= 846 "Too many open files" error running tests 9599 closed 0     6 2020-06-13T22:11:40Z 2020-06-14T00:26:31Z 2020-06-14T00:26:31Z OWNER  

I got this on my laptop:

...
/Users/simon/.local/share/virtualenvs/datasette-AWNrQs95/lib/python3.7/site-packages/jinja2/loaders.py:171: in get_source
    f = open_if_exists(filename)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

filename = '/Users/simon/Dropbox/Development/datasette/datasette/templates/400.html', mode = 'rb'

    def open_if_exists(filename, mode='rb'):
        """Returns a file descriptor for the filename if that file exists,
        otherwise `None`.
        """
        try:
>           return open(filename, mode)
E           OSError: [Errno 24] Too many open files: '/Users/simon/Dropbox/Development/datasette/datasette/templates/400.html'

/Users/simon/.local/share/virtualenvs/datasette-AWNrQs95/lib/python3.7/site-packages/jinja2/utils.py:154: OSError

Based on the conversation in https://github.com/pytest-dev/pytest/issues/2970 I'm worried that my tests are opening too many files without closing them.

In particular... I call sqlite3.connect(filepath) a LOT - and I don't ever call conn.close() on those opened connections:

https://github.com/simonw/datasette/blob/cf7a2bdb404734910ec07abc7571351a2d934828/datasette/database.py#L58-L60

Could this be resulting in my tests eventually opening too many unclosed file handles? How could I confirm this?

107914493 issue  

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