vmware/pyvmomi

Pickling pyvmomi class using multiprocessing

Open

#817 opened on Jul 23, 2019

View on GitHub
 (2 comments) (0 reactions) (0 assignees)Python (807 forks)batch import
help wantedquestion

Repository metrics

Stars
 (2,141 stars)
PR merge metrics
 (No merged PRs in 30d)

Description

Hi folk, I try do use python multiprocessing module to parallelize some data gathering from vcenter. Unfortunately i have faced with following problem during starting parallel processes:

_pickle.PicklingError: Can't pickle <class 'pyVmomi.VmomiSupport.vim.VirtualMachine'>: attribute lookup vim.VirtualMachine on pyVmomi.VmomiSupport failed

So the question is, it's that true, that pymomi doesn't support "right pickling"? Thanks, and appreciate.

Contributor guide

Research direction
Investigate the pickling mechanism in pyvmomi, specifically how classes like vim.VirtualMachine are defined. Check if there are any custom reduce or getstate methods. Consider implementing reduce or using cloudpickle as a workaround. Trace the error to understand why attribute lookup fails.
Tech stack
python
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Pythonpyvmomi
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40