Fix parallel chunk scanning shared DB connection race (v2.6.38)#47
Merged
ttlequals0 merged 1 commit intomainfrom Apr 6, 2026
Merged
Fix parallel chunk scanning shared DB connection race (v2.6.38)#47ttlequals0 merged 1 commit intomainfrom
ttlequals0 merged 1 commit intomainfrom
Conversation
…ds (v2.6.38) Parallel chunk workers (v2.6.32+) shared the parent PixelProbe instance which uses StaticPool with a single DB connection. Concurrent _save_to_cache() calls from 3+ threads caused silent write loss -- files ended up with scan_status='completed' but scan_date=NULL. The v2.6.36 raw SQL UPDATE masked this by marking unscanned files as done. Fix: each chunk worker thread gets its own PixelProbe instance via threading.local(), with tracked engine disposal after scanning completes.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
_save_to_cache()-- files markedcompletedwithoutscan_dateorscan_toolbeing setthreading.local()with engine disposal after scanningTest plan
scan_dateandscan_toolset (not NULL)