Skip to content

Make job completion order deterministic, improve tests - #42

Open
cottsay wants to merge 1 commit into
masterfrom
cottsay/parallel-executor-fixes
Open

Make job completion order deterministic, improve tests#42
cottsay wants to merge 1 commit into
masterfrom
cottsay/parallel-executor-fixes

Conversation

@cottsay

@cottsay cottsay commented Aug 29, 2026

Copy link
Copy Markdown
Member

When multiple jobs complete in the same "tick" of the parallel execution loop, the done_futures set can result in different colcon return codes depending on which one happens to get processed first. A more desirable behavior is to prefer the return code of the job which was started first.

While it is currently unlikely to see multiple jobs finish in the same tick due to strict concurrency pre-limiting, this becomes much more common under dynamic scheduling and resource-guarded execution.

This change also includes an additional test for the parallel executor, and switches all of the job identifiers to use consistent identifiers, where they were previously using different values in the overall job dictionary from the identifier used on the job objects themselves.

Assisted-by: Gemini 3.5 Flash

When multiple jobs complete in the same "tick" of the parallel execution
loop, the `done_futures` set can result in different colcon return
codes depending on which one happens to get processed first. A more
desirable behavior is to prefer the return code of the job which was
started first.

While it is currently unlikely to see multiple jobs finish in the same
tick due to strict concurrency pre-limiting, this becomes much more
common under dynamic scheduling and resource-guarded execution.

This change also includes an additional test for the parallel executor,
and switches all of the job identifiers to use consistent identifiers,
where they were previously using different values in the overall job
dictionary from the identifier used on the job objects themselves.

Assisted-by: Gemini 3.5 Flash <gemini@google.com>
@cottsay cottsay self-assigned this Aug 29, 2026
@cottsay cottsay added the bug Something isn't working label Aug 29, 2026
@codecov-commenter

codecov-commenter commented Aug 29, 2026

Copy link
Copy Markdown

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.38%. Comparing base (94dfeff) to head (58bab11).

Additional details and impacted files
@@            Coverage Diff             @@
##           master      #42      +/-   ##
==========================================
+ Coverage   96.73%   97.38%   +0.65%     
==========================================
  Files           4        4              
  Lines         153      153              
  Branches       41       41              
==========================================
+ Hits          148      149       +1     
  Misses          1        1              
+ Partials        4        3       -1     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

bug Something isn't working

Projects

None yet

Development

Successfully merging this pull request may close these issues.

2 participants