Pylance fails with a too many open files issue

[jdwestbrook]

Issue Type: Bug

With the latest release of v2021.2.1 of Pylance and
Insiders build.

Version: 1.54.0-insider
Commit: 93f705ab40b37aade9d3b5165ed09114a8c87ac9
Date: 2021-02-11T05:43:26.672Z
Electron: 11.2.3
Chrome: 87.0.4280.141
Node.js: 12.18.3
V8: 8.7.220.31-electron.0
OS: Darwin x64 20.3.0

The following traceback is displayed in the Terminal Problems Tab when multiple vsode window are open. The open file
issue is not observed when editing a single simple repo.

{
"resource": "/Users/jwest/MY_FILES/Developing/RCSB/py-rcsb_utils_chemref/rcsb/utils/tests-chemref/testRcsbLigandScoreProvider.py",
"owner": "generated_diagnostic_collection_name#0",
"severity": 8,
"message": "An internal error occurred while parsing file "/Users/jwest/MY_FILES/Developing/RCSB/py-rcsb_utils_chemref/rcsb/utils/tests-chemref/testRcsbLigandScoreProvider.py": Error: EMFILE: too many open files, scandir '/Users/jwest/MY_FILES/Developing/RCSB/py-rcsb_utils_chemref'\n at Object.readdirSync (fs.js:959:3)\n at h.readdirEntriesSync (/Users/jwest/.vscode-insiders/extensions/ms-python.vscode-pylance-2021.2.1/dist/pyright.bundle.js:1:609711)\n at B._getFilesInDirectory (/Users/jwest/.vscode-insiders/extensions/ms-python.vscode-pylance-2021.2.1/dist/pyright.bundle.js:1:160020)\n at B.resolveAbsoluteImport (/Users/jwest/.vscode-insiders/extensions/ms-python.vscode-pylance-2021.2.1/dist/pyright.bundle.js:1:152915)\n at B._resolveBestAbsoluteImport (/Users/jwest/.vscode-insiders/extensions/ms-python.vscode-pylance-2021.2.1/dist/pyright.bundle.js:1:155203)\n at B.resolveImport (/Users/jwest/.vscode-insiders/extensions/ms-python.vscode-pylance-2021.2.1/dist/pyright.bundle.js:1:147689)\n at t.SourceFile._resolveImports (/Users/jwest/.vscode-insiders/extensions/ms-python.vscode-pylance-2021.2.1/dist/pyright.bundle.js:1:255546)\n at /Users/jwest/.vscode-insiders/extensions/ms-python.vscode-pylance-2021.2.1/dist/pyright.bundle.js:1:247540\n at i.timeOperation (/Users/jwest/.vscode-insiders/extensions/ms-python.vscode-pylance-2021.2.1/dist/pyright.bundle.js:1:631349)\n at /Users/jwest/.vscode-insiders/extensions/ms-python.vscode-pylance-2021.2.1/dist/pyright.bundle.js:1:247507",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 1
}

Extension version: 2021.2.1
VS Code version: Code - Insiders 1.54.0-insider (93f705ab40b37aade9d3b5165ed09114a8c87ac9, 2021-02-11T05:43:26.672Z)
OS version: Darwin x64 20.3.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i9-8950HK CPU @ 2.90GHz (12 x 2900)
GPU Status	2d_canvas: enabled gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on protected_video_decode: unavailable_off rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled webgl: enabled webgl2: enabled
Load (avg)	2, 2, 2
Memory (System)	32.00GB (7.30GB free)
Process Argv	. --crash-reporter-id b92874fa-6087-44b6-a84a-b516454ef044
Screen Reader	no
VM	0%

A/B Experiments

vsliv695:30137379
vsins829:30139715
vsliv368:30146709
vsreu685:30147344
python383:30185418
vspyt653:30253241
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstry244:30244315
pythonvsdeb440:30224570
pythonvsded773:30223139
vstes627:30244334
pythonvspyt875:30251590
core-portspanelcf:30233468
coreuntitledfile:30249963

[jdwestbrook]

As a follow up, I am seeing failure and the traceback even in simple repos with a few hundred files in a single vscode session.

[jakebailey]

Duplicate of #936.