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_collectionname#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.