Disable pytest-xdist because it seems to be causing intermittent failures (#7069)

requirements/common.txt

@@ -76,13 +76,13 @@ blessings==1.7 \
     --hash=sha256:b1fdd7e7a675295630f9ae71527a8ebc10bfefa236b3d6aa4932ee4462c17ba3 \
     --hash=sha256:caad5211e7ba5afe04367cdd4cfc68fa886e2e08f6f35e76b7387d2109ccea6e
     # via mozlog
-boto3==1.17.33 \
-    --hash=sha256:0cac2fffc1ba915f7bb5ecee539318532db51f218c928a228fafe3e501e9472e \
-    --hash=sha256:3306dad87f993703b102a0a70ca19c549b7f41e7f70fa7b4c579735c9f79351d
+boto3==1.17.36 \
+    --hash=sha256:16ca7a34eb88138e0d1ae2532e17975eef578aa1754e2d209ad41a8dfce059ce \
+    --hash=sha256:75f59fb3d764a381bb0108cb5036b398d0c8a1cf719e6b5aadbc5a53a1fd735e
     # via mozci
-botocore==1.20.33 \
-    --hash=sha256:a33e862685259fe22d9790d9c9f3567feda8b824d44d3c62a3617af1133543a4 \
-    --hash=sha256:e355305309699d3aca1e0050fc21d48595b40db046cb0d2491cd57ff5b26920b
+botocore==1.20.36 \
+    --hash=sha256:148f5d7d48c54ed450831e5dd4d13284b2418955b6d99db23a3d9c4c6cb515c8 \
+    --hash=sha256:9ce33bd4175d58c5fdeb8e35052aa370aff74b347227e65ddc3f4fa01ef0686f
     # via
     #   boto3
     #   s3transfer
@@ -423,9 +423,9 @@ pycryptodome==3.10.1 \
     --hash=sha256:f977cdf725b20f6b8229b0c87acb98c7717e742ef9f46b113985303ae12a99da \
     --hash=sha256:fc7489a50323a0df02378bc2fff86eb69d94cc5639914346c736be981c6a02e7
     # via python-jose
-pyflakes==2.3.0 \
-    --hash=sha256:910208209dcea632721cb58363d0f72913d9e8cf64dc6f8ae2e02a3609aba40d \
-    --hash=sha256:e59fd8e750e588358f1b8885e5a4751203a0516e0ee6d34811089ac294c8806f
+pyflakes==2.3.1 \
+    --hash=sha256:7893783d01b8a89811dd72d7dfd4d84ff098e5eed95cfa8905b22bbffe52efc3 \
+    --hash=sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db
     # via flake8
 pyrsistent==0.17.3 \
     --hash=sha256:2e636185d9eb976a18a8a8e96efce62f2905fea90041958d8cc2a189756ebf3e

requirements/dev.in

@@ -16,9 +16,6 @@ pre-commit
 pytest-testmon
 pytest-watch
 
-# parallelize tests
-pytest-xdist
-
 # Required by django-extension's runserver_plus command.
 flake8
 pytest-django

requirements/dev.txt

@@ -4,10 +4,6 @@
 #
 #    pip-compile --allow-unsafe --generate-hashes --output-file=requirements/dev.txt requirements/dev.in
 #
-apipkg==1.5 \
-    --hash=sha256:37228cda29411948b422fae072f57e31d3396d2ee1c9783775980ee9c9990af6 \
-    --hash=sha256:58587dd4dc3daefad0487f6d9ae32b4542b185e1c36db6993290e7c41ca2b47c
-    # via execnet
 appdirs==1.4.4 \
     --hash=sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41 \
     --hash=sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128
@@ -134,10 +130,6 @@ django==3.1.4 \
 docopt==0.6.2 \
     --hash=sha256:49b3a825280bd66b3aa83585ef59c4a8c82f2c8a522dbe754a8bc8d08c85c491
     # via pytest-watch
-execnet==1.8.0 \
-    --hash=sha256:7a13113028b1e1cc4c6492b28098b3c6576c9dccc7973bfe47b342afadafb2ac \
-    --hash=sha256:b73c5565e517f24b62dea8a5ceac178c661c4309d3aa0c3e420856c072c411b4
-    # via pytest-xdist
 filelock==3.0.12 \
     --hash=sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59 \
     --hash=sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836
@@ -211,16 +203,14 @@ pre-commit==2.11.1 \
 py==1.10.0 \
     --hash=sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3 \
     --hash=sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a
-    # via
-    #   pytest
-    #   pytest-forked
+    # via pytest
 pycodestyle==2.7.0 \
     --hash=sha256:514f76d918fcc0b55c6680472f0a37970994e07bbb80725808c17089be302068 \
     --hash=sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef
     # via flake8
-pyflakes==2.3.0 \
-    --hash=sha256:910208209dcea632721cb58363d0f72913d9e8cf64dc6f8ae2e02a3609aba40d \
-    --hash=sha256:e59fd8e750e588358f1b8885e5a4751203a0516e0ee6d34811089ac294c8806f
+pyflakes==2.3.1 \
+    --hash=sha256:7893783d01b8a89811dd72d7dfd4d84ff098e5eed95cfa8905b22bbffe52efc3 \
+    --hash=sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db
     # via flake8
 pyparsing==2.4.7 \
     --hash=sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1 \
@@ -242,10 +232,6 @@ pytest-django==4.1.0 \
     --hash=sha256:10e384e6b8912ded92db64c58be8139d9ae23fb8361e5fc139d8e4f8fc601bc2 \
     --hash=sha256:26f02c16d36fd4c8672390deebe3413678d89f30720c16efb8b2a6bf63b9041f
     # via -r requirements/dev.in
-pytest-forked==1.3.0 \
-    --hash=sha256:6aa9ac7e00ad1a539c41bec6d21011332de671e938c7637378ec9710204e37ca \
-    --hash=sha256:dc4147784048e70ef5d437951728825a131b81714b398d5d52f17c7c144d8815
-    # via pytest-xdist
 pytest-freezegun==0.4.2 \
     --hash=sha256:19c82d5633751bf3ec92caa481fb5cffaac1787bd485f0df6436fd6242176949 \
     --hash=sha256:5318a6bfb8ba4b709c8471c94d0033113877b3ee02da5bfcd917c1889cde99a7
@@ -256,10 +242,6 @@ pytest-testmon==1.1.0 \
 pytest-watch==4.2.0 \
     --hash=sha256:06136f03d5b361718b8d0d234042f7b2f203910d8568f63df2f866b547b3d4b9
     # via -r requirements/dev.in
-pytest-xdist==2.2.1 \
-    --hash=sha256:2447a1592ab41745955fb870ac7023026f20a5f0bfccf1b52a879bd193d46450 \
-    --hash=sha256:718887296892f92683f6a51f25a3ae584993b06f7076ce1e1fd482e59a8220a2
-    # via -r requirements/dev.in
 pytest==6.2.2 \
     --hash=sha256:9d1edf9e7d0b84d72ea3dbcdfd22b35fb543a5e8f2a60092dd578936bf63d7f9 \
     --hash=sha256:b574b57423e818210672e07ca1fa90aaf194a4f63f3ab909a2c67ebb22913839
@@ -267,11 +249,9 @@ pytest==6.2.2 \
     #   pytest-asyncio
     #   pytest-cov
     #   pytest-django
-    #   pytest-forked
     #   pytest-freezegun
     #   pytest-testmon
     #   pytest-watch
-    #   pytest-xdist
 python-dateutil==2.8.1 \
     --hash=sha256:73ebfe9dbf22e832286dafa60473e4cd239f8592f699aa5adaf10050e6e1823c \
     --hash=sha256:75bb3f31ea686f1197762692a9ee6a7550b59fc6ca3a1f4b5d7e32fb98e2da2a

tox.ini

@@ -17,7 +17,7 @@ commands =
     {toxinidir}/manage.py check
     sh -c "SITE_URL=https://treeherder.dev TREEHERDER_DEBUG=False ./manage.py check --deploy --fail-level WARNING"
     # Running slow tests (DB required)
-    pytest tests/ --runslow -n auto
+    pytest tests/ --runslow
 commands_post =
     # This is to deal with running the containers with --detached
     docker-compose down
@@ -70,7 +70,7 @@ whitelist_externals=
 commands_pre =
     docker-compose build
 commands =
-    docker-compose run -e TREEHERDER_DEBUG=False backend bash -c "pytest --cov --cov-report=xml tests/ --runslow -n auto"
+    docker-compose run -e TREEHERDER_DEBUG=False backend bash -c "pytest --cov --cov-report=xml tests/ --runslow"
 
 [flake8]
 per-file-ignores = treeherder/model/models.py:E402