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Python language server crashes with large files open #3011

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Python language server crashes with large files open#3011
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area-intellisenseLSP-related functionality: auto-complete, docstrings, navigation, refactoring, etc.bugIssue identified by VS Code Team member as probable bug

Description

@pankajp
Pankaj Pandey (pankajp)
opened on Oct 25, 2018

Environment data

  • VS Code version: 1.28.2 (User Setup)
  • Extension version (available under the Extensions sidebar): 2018.9.1
  • OS and version: Windows 10
  • Python version (& distribution if applicable, e.g. Anaconda): Anaconda, python 3.7.0
  • Type of virtual environment used (N/A | venv | virtualenv | conda | ...): conda root env
  • Relevant/affected Python packages and their versions: -

Actual behavior

Python language server continually crashes (I have some pretty large python files open) and a window frequently pops up with following message.
image

Carried forward from: #2108

Expected behavior

Thing should run normally, if a file cannot be handled it should inform me as such and at least not crash.

Steps to reproduce:

  1. Open VSCode with files

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Starting Microsoft Python language server.
Downloading https://pvsc.blob.core.windows.net/python-language-server-stable/Python-Language-Server-win-x64.0.1.48.nupkg... complete.
Unpacking archive... done.
Microsoft Python Language Server version 0.1.48.0
Initializing for C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\python.exe
Reloading modules... 
done.
Reloading modules... 

Process is terminating due to StackOverflowException.
[Info  - 10:15:09 PM] Connection to server got closed. Server will restart.
Microsoft Python Language Server version 0.1.48.0
Initializing for C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\python.exe

Process is terminating due to StackOverflowException.
[Info  - 10:17:00 PM] Connection to server got closed. Server will restart.
Microsoft Python Language Server version 0.1.48.0
Initializing for C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\python.exe

Process is terminating due to StackOverflowException.
[Info  - 10:18:18 PM] Connection to server got closed. Server will restart.
Microsoft Python Language Server version 0.1.48.0
Initializing for C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\python.exe
##########Linting Output - pylint##########
************* Module opt_recipes
5128,0,warning,W0301:Unnecessary semicolon
5177,0,warning,W0301:Unnecessary semicolon
17519,0,warning,W0301:Unnecessary semicolon

...


10618,8,warning,W0612:Unused variable 'index'
10626,16,warning,W0612:Unused variable 'lindex'
10922,8,warning,W0612:Unused variable 'm'

Process is terminating due to StackOverflowException.
[Info  - 10:19:18 PM] Connection to server got closed. Server will restart.
Microsoft Python Language Server version 0.1.48.0
Initializing for C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\python.exe

Process is terminating due to StackOverflowException.
[Info  - 10:20:23 PM] Connection to server got closed. Server will restart.
Microsoft Python Language Server version 0.1.48.0
Initializing for C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\python.exe

Process is terminating due to StackOverflowException.
[Info  - 10:21:27 PM] Connection to server got closed. Server will restart.
Microsoft Python Language Server version 0.1.48.0
Initializing for C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\python.exe

[...repeats indefinitely...]

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4274 Overwriting grammar scope name to file mapping for scope text.html.django.
Old grammar file: file:///c%3A/Users/ppandey/.vscode/extensions/batisteo.vscode-django-0.17.0/syntaxes/django-html.tmLanguage.json.
New grammar file: file:///c%3A/Users/ppandey/.vscode/extensions/bibhasdn.django-html-1.2.0/syntaxes/django-html.json
e.register @ /C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4274
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4274 Overwriting grammar scope name to file mapping for scope source.python.
Old grammar file: file:///c%3A/Users/ppandey/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/extensions/python/syntaxes/MagicPython.tmLanguage.json.
New grammar file: file:///c%3A/Users/ppandey/.vscode/extensions/magicstack.magicpython-1.1.0/grammars/MagicPython.tmLanguage
e.register @ /C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4274
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:1409  INFO no standard startup: not just one window
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] activating extension
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] starting language server
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:1409   ERR File(s) not opened on this client.

/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] rejected promise not handled within 1 second
t.log @ /C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Traceback (most recent call last):
  File "C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\Scripts\jupyter-notebook-script.py", line 6, in <module>
    from notebook.notebookapp import main
  File "C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\lib\site-packages\notebook\notebookapp.py", line 46, in <module>
    from zmq.eventloop import ioloop
  File "C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\lib\site-packages\zmq\__init__.py", line 47, in <module>
    from zmq import backend
  File "C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\lib\site-packages\zmq\backend\__init__.py", line 40, in <module>
    reraise(*exc_info)
  File "C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\lib\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise
    raise value
  File "C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\lib\site-packages\zmq\backend\__init__.py", line 27, in <module>
    _ns = select_backend(first)
  File "C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\lib\site-packages\zmq\backend\select.py", line 27, in select_backend
    mod = __import__(name, fromlist=public_api)
  File "C:\Users\ppandey\AppData\Local\Continuum\Anaconda3\lib\site-packages\zmq\backend\cython\__init__.py", line 6, in <module>
    from . import (constants, error, message, context,
ImportError: DLL load failed: The specified module could not be found.

t.log @ /C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Python Extension: Listing Nuget Packages, Arg 1: "https://pvsc.blob.core.windows.net", Arg 2: "python-language-server-stable", Arg 3: "Python-Language-Server-win-x64"
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Python Extension: Get latest language server nuget package version, , Return Value: {"package":"Python-Language-Server-win-x64.0.1.48.nupkg","uri":"https://pvsc.blob.core.windows.net/python-language-server-stable/Python-Language-Server-win-x64.0.1.48.nupkg","version":{"loose":true,"raw":"0.1.48","major":0,"minor":1,"patch":48,"prerelease":[],"build":[],"version":"0.1.48"}}
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Python Extension: Get latest version of Language Server, , Return Value: {"package":"Python-Language-Server-win-x64.0.1.48.nupkg","uri":"https://pvsc.blob.core.windows.net/python-language-server-stable/Python-Language-Server-win-x64.0.1.48.nupkg","version":{"loose":true,"raw":"0.1.48","major":0,"minor":1,"patch":48,"prerelease":[],"build":[],"version":"0.1.48"}}
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Python Extension: Get language server folder name, , Return Value: "languageServer.0.1.48"
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Python Extension: Listing Nuget Packages, Arg 1: "https://pvsc.blob.core.windows.net", Arg 2: "python-language-server-stable", Arg 3: "Python-Language-Server-win-x64"
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Python Extension: Get latest language server nuget package version, , Return Value: {"package":"Python-Language-Server-win-x64.0.1.48.nupkg","uri":"https://pvsc.blob.core.windows.net/python-language-server-stable/Python-Language-Server-win-x64.0.1.48.nupkg","version":{"loose":true,"raw":"0.1.48","major":0,"minor":1,"patch":48,"prerelease":[],"build":[],"version":"0.1.48"}}
/C:/Users/ppandey/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Python Extension: Get latest version of Language Server, , Return Value: {"package":"Python-Language-Server-win-x64.0.1.48.nupkg","uri":"https://pvsc.blob.core.windows.net/python-language-server-stable/Python-Language-Server-win-x64.0.1.48.nupkg","version":{"loose":true,"raw":"0.1.48","major":0,"minor":1,"patch":48,"prerelease":[],"build":[],"version":"0.1.48"}}

Activity

  1. Brett Cannon (brettcannon)
    self-assigned this
    on Oct 25, 2018
  2. Brett Cannon (brettcannon)
    added
    triage
    on Oct 25, 2018

  3. brettcannon commented on Oct 25, 2018

    @brettcannon
    Brett Cannon (brettcannon)
    on Oct 25, 2018
    Member

    Can you help give us a concept of what "large" and "some" is? Are we talking 10,000 lines of code? A million? And do you have 3 such files open? 20? Any chance you can share the files with us?

    FYI I've opened a relevant issue with the language server if you want to answer the questions over there.

  4. Brett Cannon (brettcannon)
    added
    bugIssue identified by VS Code Team member as probable bug
    area-intellisenseLSP-related functionality: auto-complete, docstrings, navigation, refactoring, etc.
    upstream-language server
    needs upstream fix
    and removed
    triage
    on Oct 25, 2018
  5. Brett Cannon (brettcannon)
    removed their assignment
    on Oct 25, 2018

  6. MikhailArkhipov commented on Oct 25, 2018

    @MikhailArkhipov
    Mikhail Arkhipov (MikhailArkhipov)
    on Oct 25, 2018

    Pankaj Pandey (@pankajp) - did it happen before or it is new in the .48?

  7. pankajp commented on Oct 26, 2018

    @pankajp
    Pankaj Pandey (pankajp)
    on Oct 26, 2018
    Author

    This is not a new issue. Moving further discussion to the upstream gh issue created by Brett ( microsoft/python-language-server#309 ). Thanks

  8. luabud commented on Sep 11, 2019

    @luabud
    Luciana Abud (luabud)
    on Sep 11, 2019
    Member

    Fixed upstream (microsoft/python-language-server#309)

  9. Luciana Abud (luabud)
    closed this as completedon Sep 11, 2019
  10. ghost removed
    needs upstream fix
    on Sep 11, 2019
  11. lock
    locked as resolved and limited conversation to collaborators on Sep 18, 2019
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