Parallel execution is unreliable since 2025.5.14 #5451

pietrodn · 2025-06-27T15:46:04Z

pietrodn
Jun 27, 2025

Hi, I'm trying to define a Mise task to run in parallel other tasks. This is my mise.toml reproduction case:

[tasks.process1]
run = "echo 'process1 begin' && sleep 5 && echo 'process1 done'"

[tasks.process2]
run = "echo 'process2 begin' && sleep 5 && echo 'process2 done'"

[tasks.process3]
run = "echo 'process3 begin' && sleep 5 && echo 'process3 done'"

[tasks.process4]
run = "echo 'process4 begin' && sleep 5 && echo 'process4 done'"

[tasks.process5]
run = "echo 'process5 begin' && sleep 5 && echo 'process5 done'"

[tasks.process6]
run = "echo 'process6 begin' && sleep 5 && echo 'process6 done'"

[tasks.run-all]
run = "mise run process1 ::: process2 ::: process3 ::: process4 ::: process5 ::: process6"

What I do

I run mise r run-all

What I expect

$ mise r run-all
[run-all] $ mise run process1 ::: process2 ::: process3 ::: process4 ::: process5 ::: process6
[process6] $ echo 'process6 begin' && sleep 5 && echo 'process6 done'
[process2] $ echo 'process2 begin' && sleep 5 && echo 'process2 done'
[process4] $ echo 'process4 begin' && sleep 5 && echo 'process4 done'
[process3] $ echo 'process3 begin' && sleep 5 && echo 'process3 done'
[process1] $ echo 'process1 begin' && sleep 5 && echo 'process1 done'
[process5] $ echo 'process5 begin' && sleep 5 && echo 'process5 done'
process6 begin
process4 begin
process1 begin
process2 begin
process3 begin
process5 begin
process6 done
process4 done
process1 done
process2 done
process3 done
process5 done
Finished in 5.03s

(this sometimes happens)

What is happening

$ mise r run-all
[run-all] $ mise run process1 ::: process2 ::: process3 ::: process4 ::: process5 ::: process6
[process5] $ echo 'process5 begin' && sleep 5 && echo 'process5 done'
process5 begin
process5 done
[process4] $ echo 'process4 begin' && sleep 5 && echo 'process4 done'
process4 begin
process4 done
[process1] $ echo 'process1 begin' && sleep 5 && echo 'process1 done'
[process3] $ echo 'process3 begin' && sleep 5 && echo 'process3 done'
process3 begin
process1 begin
process3 done
process1 done
[process6] $ echo 'process6 begin' && sleep 5 && echo 'process6 done'
process6 begin
process6 done
[process2] $ echo 'process2 begin' && sleep 5 && echo 'process2 done'
process2 begin
process2 done
Finished in 25.18s

(This happens intermittently.)

The problem

After bisecting a bit, I found out that the parallel execution of task has become unreliable since Mise 2025.5.14.
The tasks are sometimes launched all in parallel and sometimes one at a time. Until Mise 2025.5.13, they were all launched together and in parallel.

Info

I am running version: 2025.6.8 macos-arm64 (2025-06-26)
mise doctor reports no issues.
Setting MISE_JOBS does not change the behavior.

jdx · 2025-09-06T23:48:14Z

jdx
Sep 6, 2025
Maintainer

I seem unable to reproduce this: #6221

0 replies

pavelzherdin · 2025-09-07T17:35:41Z

pavelzherdin
Sep 7, 2025

I think the test case is incomplete. With just that config in isolation, run-all works for me. There's probably ~/.config/mise/config.toml with something more.

Some attempts to reproduce point at needing a few tools to actually see the problem. F.e. these were enough for me inside a container:

[tools]
python = "3.12"
pipx = "latest"
pipenv = "latest"

I don't know if there's a way to have a "dummy" tool. And I tried picking tools that have "depends" in the registry.toml.

0 replies

pietrodn · 2025-09-08T12:17:37Z

pietrodn
Sep 8, 2025
Author

I can still reproduce on version 2025.9.6 macos-arm64 (2025-09-08)

My ~/.config/mise/config.toml is:

[tools]
node = "latest"
pipx = "latest"
pnpm = "latest"
poetry = "latest"
python = "latest"
rust = "latest"
terraform = "latest"
uv = "latest"
yarn = "1"

[settings]
idiomatic_version_file_enable_tools = ["node"]

3 replies

jdx Sep 8, 2025
Maintainer

ah poetry seems to be the culprit: #6237

I'll probably need to dive in another time but I suspect it's something to do with https://github.com/mise-plugins/mise-poetry/blob/main/mise.plugin.toml or mise-poetry's exec-env.

jdx Sep 8, 2025
Maintainer

GPT5 came up with a solution in that PR, turned out to be incredibly complicated.
I think his solution might have unintended consequences so I need to work at it a bit more but at least we've found out what caused it

pietrodn Sep 9, 2025
Author

Hm, it doesn't seem that poetry is the only issue. If configured alone, yarn, poetry, pipx all give the same issue, while other tools don't.

Results of my experiments:

Tools Installed	Working correctly
∅	✅
`poetry`	❌
`yarn`	❌
`pipx`	❌
`node`	✅
`node`, `pnpm`	✅
`node`, `pnpm`, `terraform`	✅
`node`, `pnpm`, `terraform`, `rust`	✅
`node`, `pnpm`, `terraform`, `rust`, `uv`	✅
`node`, `pnpm`, `terraform`, `rust`, `uv`, `python`	✅
`node`, `pnpm`, `yarn`	❌

(✅ = No bug, ❌ = Bug is present)

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Parallel execution is unreliable since 2025.5.14 #5451

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pietrodn Jun 27, 2025

What I do

What I expect

What is happening

The problem

Info

Replies: 3 comments · 3 replies

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jdx Sep 6, 2025 Maintainer

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pavelzherdin Sep 7, 2025

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pietrodn Sep 8, 2025 Author

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jdx Sep 8, 2025 Maintainer

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jdx Sep 8, 2025 Maintainer

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pietrodn Sep 9, 2025 Author

pietrodn
Jun 27, 2025

Replies: 3 comments 3 replies

jdx
Sep 6, 2025
Maintainer

pavelzherdin
Sep 7, 2025

pietrodn
Sep 8, 2025
Author

jdx Sep 8, 2025
Maintainer

jdx Sep 8, 2025
Maintainer

pietrodn Sep 9, 2025
Author