This is interesting:

python import resource print(resource.getrlimit(resource.RLIMIT_NOFILE)) On Mac: ```pycon

print(resource.getrlimit(resource.RLIMIT_NOFILE)) (256, 9223372036854775807) On Ubuntu (in a Docker `ubuntu:22.04` container):pycon resource.getrlimit(resource.RLIMIT_NOFILE) (1048576, 1048576) ```

The refactor in the following issue did NOT prevent this error from occurring when I try to run the full pytest suite on my Mac laptop:

• 1959

I have a nasty feeling the cleaner solution for this would involve porting my entire test suite from def test_blah(app_client) sync functions (which work due to a @async_to_sync call in TestClient) to async def test_blah(async_fixture): functions instead.

I've been using that latter pattern for new tests (and plugin tests) for quite a while now, but I never took on the job of refactoring all of the old ones.

A search for (app_client): across the whole project currently returns 194 results which might be a reasonable target to try switching to the new pattern as a starting point.

No idea if it will have much impact on the "Too many open files" errors though.

I'll still use on-disk test databases for is_immutable=True, but not for the majority of tests.

When I initially built this test suite Datasette didn't have the memory_name= mechanism for creating persistent in-memory databases.

I'm going to see if I can switch to that for the majority of Datasette's tests. Might find that doing so both fixes this "too many open files" issue AND gives me a significant speed improvement to the test site too!

Hopefully I can do most of the work on that in this big ugly function:

https://github.com/simonw/datasette/blob/dc18f62089e5672d03176f217d7840cdafa5c447/tests/fixtures.py#L104-L173

I've been seeing this error again:

ERROR tests/test_api_write.py::test_create_table[input16-400-expected_response16] - OSError: [Errno 24] Too ... ERROR tests/test_api_write.py::test_create_table[input17-400-expected_response17] - OSError: [Errno 24] Too ... ERROR tests/test_api_write.py::test_create_table[input18-400-expected_response18] - OSError: [Errno 24] Too ...

It doesn't happen in CI, and it turns out that's because CI runs pytest -n auto which splits the tests across multiple parallel processes.

I've been working around the error on my laptop using pytest -n auto there too, but I'd rather not have to do that.

This is also getting in my way when I try to debug other issues, like this one:

• 1955

Docs for the new db.close() method: https://docs.datasette.io/en/latest/internals.html#db-close

I added extra debug info to /-/threads to see this for myself:

diff diff --git a/datasette/app.py b/datasette/app.py index 02bd38f1..16579e28 100644 --- a/datasette/app.py +++ b/datasette/app.py @@ -969,6 +969,13 @@ class Datasette: "threads": [ {"name": t.name, "ident": t.ident, "daemon": t.daemon} for t in threads ], + "file_connections": { + db.name: [ + [dict(r) for r in conn.execute("pragma database_list").fetchall()] + for conn in db._all_file_connections + ] + for db in self.databases.values() + }, } # Only available in Python 3.7+ if hasattr(asyncio, "all_tasks"): Output after hitting refresh on a few /fixtures tables to ensure more threads started:

"file_connections": { "_internal": [], "fixtures": [ [ { "seq": 0, "name": "main", "file": "/Users/simon/Dropbox/Development/datasette/fixtures.db" } ], [ { "seq": 0, "name": "main", "file": "/Users/simon/Dropbox/Development/datasette/fixtures.db" } ], [ { "seq": 0, "name": "main", "file": "/Users/simon/Dropbox/Development/datasette/fixtures.db" } ] ] }, I decided not to ship this feature though as it leaks the names of internal database files.

Confirmed that calling conn.close() on each SQLite file-based connection is the way to fix this problem.

I'm adding a db.close() method (sync, not async - I tried async first but it was really hard to cause every thread in the pool to close its threadlocal database connection) which loops through all known open file-based connections and closes them.

This is affecting me a lot at the moment, on my laptop (runs fine in CI).

Here's a change to conftest.py which highlights the problem - it cause a failure the moment there are more than 5 open files according to psutil:

diff diff --git a/tests/conftest.py b/tests/conftest.py index f4638a14..21d433c1 100644 --- a/tests/conftest.py +++ b/tests/conftest.py @@ -1,6 +1,7 @@ import httpx import os import pathlib +import psutil import pytest import re import subprocess @@ -192,3 +193,8 @@ def ds_unix_domain_socket_server(tmp_path_factory): yield ds_proc, uds # Shut it down at the end of the pytest session ds_proc.terminate() + + +def pytest_runtest_teardown(item: pytest.Item) -> None: + open_files = psutil.Process().open_files() + assert len(open_files) < 5 The first error I get from this with pytest --pdb -x is here:

``` tests/test_api.py ............E

traceback >>>>>

item = <Function test_sql_time_limit>

def pytest_runtest_teardown(item: pytest.Item) -> None:
    open_files = psutil.Process().open_files()

  assert len(open_files) < 5

E AssertionError: assert 5 < 5 E + where 5 = len([popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpfglrt4p2/fixtures.db', fd=14), popenfile(... fd=19), popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmphdi5b250/fixtures.dot.db', fd=20)])

/Users/simon/Dropbox/Development/datasette/tests/conftest.py:200: AssertionError

entering PDB >>>>>

PDB post_mortem (IO-capturing turned off) >>>>> /Users/simon/Dropbox/Development/datasette/tests/conftest.py(200)pytest_runtest_teardown() -> assert len(open_files) < 5 ``` That's this test:

https://github.com/simonw/datasette/blob/2ec5583629005b32cb0877786f9681c5d43ca33f/tests/test_api.py#L656-L673

Which uses this fixture:

https://github.com/simonw/datasette/blob/2ec5583629005b32cb0877786f9681c5d43ca33f/tests/fixtures.py#L228-L231

Which calls this function:

https://github.com/simonw/datasette/blob/2ec5583629005b32cb0877786f9681c5d43ca33f/tests/fixtures.py#L105-L122

So now I'm suspicious that, even though the fixture is meant to be session scoped, the way I'm using with tempfile.TemporaryDirectory() as tmpdir: is causing a whole load of files to be created and held open which are not later closed.

This time I'm suspicious that there are open SQLite files tucked away in thread locals hidden inside my thread pool executor:

https://github.com/simonw/datasette/blob/c7dd76c26257ded5bcdfd0570e12412531b8b88f/datasette/database.py#L24

https://github.com/simonw/datasette/blob/c7dd76c26257ded5bcdfd0570e12412531b8b88f/datasette/database.py#L204-L214

Just saw this error again!

This seems to have fixed it.

Maybe I need to explicitly close those SQLite connections held by the Datasette instance after this line: https://github.com/simonw/datasette/blob/79aa0de083d38a9975915d5a4cc68ca6c74fbe3d/tests/fixtures.py#L165

Extracted a TIL: https://til.simonwillison.net/python/too-many-open-files-psutil

I did pip install psutil and then ran this in the debugger for one of these errors:

python import psutil for f in psutil.Process().open_files(): print(f) The output looked like this:

popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpq31d2af1/fixtures.db', fd=11) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpoxdpxj6w/fixtures.db', fd=12) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpfd3oyo10/fixtures.dot.db', fd=13) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpezwfu7w8/fixtures.db', fd=14) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpq31d2af1/fixtures.db', fd=15) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpq31d2af1/fixtures.db', fd=16) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpz6e2anqw/fixtures.db', fd=17) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpoxdpxj6w/fixtures.db', fd=18) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpdp4we7hb/fixtures.db', fd=19) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpfd3oyo10/fixtures.dot.db', fd=20) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp4ljq_ai0/fixtures.db', fd=21) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpezwfu7w8/fixtures.db', fd=22) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp907xmnzb/fixtures.db', fd=24) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpz6e2anqw/extra database.db', fd=25) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpz6e2anqw/fixtures.db', fd=26) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpzlwn6bqm/fixtures.db', fd=27) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpdp4we7hb/fixtures.db', fd=28) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp42e6vyj_/fixtures.db', fd=29) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp4ljq_ai0/fixtures.db', fd=31) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpw32vwkjq/fixtures.db', fd=32) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp907xmnzb/extra database.db', fd=33) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp907xmnzb/fixtures.db', fd=34) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpw32vwkjq/fixtures.db', fd=35) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpzlwn6bqm/foo-bar.db', fd=36) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpzlwn6bqm/foo.db', fd=37) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpzlwn6bqm/fixtures.db', fd=38) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpcl1edmyv/fixtures.db', fd=39) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp42e6vyj_/fixtures.db', fd=40) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpoxdpxj6w/fixtures.db', fd=41) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp0w5jugqk/fixtures.db', fd=42) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpmb9y9fba/fixtures.db', fd=43) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpfwsbx941/fixtures.db', fd=44) popenfile(path='/Users/simon/Dropbox/Development/datasette/tests/spatialite.db', fd=45) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp0w5jugqk/fixtures.db', fd=46) popenfile(path='/Users/simon/Dropbox/Development/datasette/tests/spatialite.db', fd=47) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpmb9y9fba/fixtures.db', fd=48) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_serve_create0/does_not_exist_yet.db', fd=49) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpfwsbx941/data.db', fd=92) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpfwsbx941/fixtures.db', fd=93) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpfwsbx941/data.db', fd=94) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_serve_duplicate_database_0/db.db', fd=95) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_serve_duplicate_database_0/nested/db.db', fd=99) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_serve_deduplicate_same_da0/db.db', fd=100) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_weird_database_names_test0/test-database (1).sqlite', fd=101) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_weird_database_names_test0/test-database (1).sqlite', fd=102) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_serve_duplicate_database_0/db.db', fd=103) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_serve_duplicate_database_0/nested/db.db', fd=104) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_weird_database_names_data0/database (1).sqlite', fd=105) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_weird_database_names_data0/database (1).sqlite', fd=106) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_weird_database_names_test0/test-database (1).sqlite', fd=107) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_weird_database_names_test0/test-database (1).sqlite', fd=109) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_weird_database_names_data0/database (1).sqlite', fd=111) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test_weird_database_names_data0/database (1).sqlite', fd=113) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmppju9w34z/fixtures.db', fd=117) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpky1jamnv/fixtures.db', fd=118) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_0.db', fd=119) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/config-dir0/demo.db', fd=120) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/config-dir0/immutable.db', fd=121) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/config-dir0/k.sqlite', fd=122) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/config-dir0/j.sqlite3', fd=123) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_1.db', fd=124) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmppju9w34z/extra database.db', fd=125) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmppju9w34z/fixtures.db', fd=126) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmppju9w34z/extra database.db', fd=127) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmppju9w34z/fixtures.db', fd=128) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_2.db', fd=129) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_3.db', fd=130) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_4.db', fd=131) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_5.db', fd=132) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_6.db', fd=133) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_7.db', fd=134) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_8.db', fd=135) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_9.db', fd=136) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_0.db', fd=137) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_1.db', fd=138) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_2.db', fd=139) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_3.db', fd=140) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_4.db', fd=141) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_5.db', fd=142) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_6.db', fd=143) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_7.db', fd=144) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_8.db', fd=145) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_9.db', fd=146) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_10.db', fd=147) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpmzu4jbdx/fixtures.db', fd=148) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpskyh32wh/fixtures.db', fd=149) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp966705ec/fixtures.db', fd=150) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_0.db', fd=151) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_1.db', fd=152) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_2.db', fd=153) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_3.db', fd=154) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_4.db', fd=155) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_5.db', fd=156) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_6.db', fd=157) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_7.db', fd=158) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_8.db', fd=159) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_9.db', fd=160) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_10.db', fd=161) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_0.db', fd=162) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_1.db', fd=163) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_2.db', fd=164) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_3.db', fd=165) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_4.db', fd=166) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_5.db', fd=167) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_6.db', fd=168) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_7.db', fd=169) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_8.db', fd=170) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/dbs0/db_9.db', fd=171) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpky1jamnv/fixtures.db', fd=172) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpwmewpy8e/fixtures.db', fd=173) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpmzu4jbdx/fixtures.db', fd=174) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpkyn60obe/fixtures.db', fd=175) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpskyh32wh/fixtures.db', fd=176) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpcl1edmyv/fixtures.db', fd=177) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp966705ec/fixtures.db', fd=178) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp4gctb4i6/fixtures.db', fd=179) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpwmewpy8e/fixtures.db', fd=180) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp4gctb4i6/fixtures.db', fd=181) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpkyn60obe/fixtures.db', fd=182) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp4gctb4i6/fixtures.db', fd=183) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmps7p_ee_e/fixtures.db', fd=184) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpf3_6i1d6/fixtures.db', fd=185) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp6_9vzq4o/fixtures.db', fd=187) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpqtubcoah/fixtures.db', fd=188) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmps7p_ee_e/extra database.db', fd=189) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmps7p_ee_e/fixtures.db', fd=190) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp2gauogmy/fixtures.db', fd=191) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpf3_6i1d6/fixtures.db', fd=192) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmprh373nt1/fixtures.db', fd=193) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp6_9vzq4o/fixtures.db', fd=197) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmprh373nt1/extra database.db', fd=198) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpqtubcoah/fixtures.db', fd=211) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmprh373nt1/fixtures.db', fd=212) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp2gauogmy/fixtures.db', fd=215) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpd2tleqni/fixtures.db', fd=216) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpd2tleqni/fixtures.db', fd=217) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmplpdc3wfl/fixtures.db', fd=219) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpdnsscl5v/fixtures.db', fd=222) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmptjayd3pn/fixtures.db', fd=223) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp4u5oo5ne/fixtures.db', fd=224) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp0dgqc4wx/fixtures.db', fd=225) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpdnsscl5v/fixtures.db', fd=226) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpoehh1_tg/fixtures.db', fd=227) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp4u5oo5ne/fixtures.db', fd=247) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmp0dgqc4wx/fixtures.db', fd=251) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmpoehh1_tg/fixtures.db', fd=253) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/tmptjayd3pn/fixtures.db', fd=254) popenfile(path='/private/var/folders/wr/hn3206rs1yzgq3r49bz8nvnh0000gn/T/pytest-of-simon/pytest-14/test-view-names0/fixtures.db', fd=255) Clearly something is bad with the way fixtures work in the tests - a huge number of fixtures.db database files are being created and left open!