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Reject Duplicate Submissions #5047

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@rajpatel24 rajpatel24 commented Aug 5, 2024

Checklist

  1. If you've added code that should be tested, add tests
  2. If you've changed APIs, update (or create!) the documentation
  3. Ensure the tests pass
  4. Make sure that your code lints and that you've followed our coding style
  5. Write a title and, if necessary, a description of your work suitable for publishing in our release notes
  6. Mention any related issues in this repository (as #ISSUE) and in other repositories (as kobotoolbox/other#ISSUE)
  7. Open an issue in the docs if there are UI/UX changes

Description

We have identified a race condition in the submission processing that causes duplicate submissions with identical UUIDs and XML hashes. This issue is particularly problematic under conditions with multiple remote devices submitting forms simultaneously over unreliable networks.

To address this issue, a PR has been raised with the following proposed changes:

  • Race Condition Resolution: A locking mechanism has been added to prevent the race condition when checking for existing instances and creating new ones. This aims to eliminate duplicate submissions.

  • UUID Enforcement: Submissions without a UUID are now explicitly disallowed. This ensures that every submission is uniquely identifiable and further mitigates the risk of duplicate entries.

These changes should improve the robustness of the submission process and prevent both race conditions and invalid submissions.

Notes

  • Implemented a fix to address the race condition that leads to duplicate submissions with the same UUID and XML hash.
  • Incorporated improvements from existing work, ensuring consistency and robustness in handling concurrent submissions.
  • The fix aims to prevent duplicate submissions, even under high load and unreliable network conditions.

Related issues

Supersedes kobotoolbox/kobocat#876

@rajpatel24 rajpatel24 changed the base branch from main to beta August 5, 2024 12:43
@noliveleger noliveleger self-requested a review August 5, 2024 13:43
@rajpatel24 rajpatel24 force-pushed the 862-reject_duplicate_submissions branch from 28eefe5 to 039ed95 Compare August 5, 2024 16:20
@rajpatel24 rajpatel24 changed the title 862 Reject Duplicate Submissions Reject Duplicate Submissions Aug 5, 2024
@rajpatel24 rajpatel24 force-pushed the 862-reject_duplicate_submissions branch from 039ed95 to 6a177da Compare August 7, 2024 13:51
@noliveleger noliveleger self-assigned this Aug 21, 2024
@noliveleger noliveleger changed the base branch from beta to kobocat-django-app-part-2-refactor-mock-deployment-backend August 21, 2024 19:47
 # Conflicts:
 #	kobo/apps/openrosa/apps/logger/exceptions.py
 #	kobo/apps/openrosa/apps/logger/models/instance.py
 #	kobo/apps/openrosa/apps/logger/models/xform.py
 #	kobo/apps/openrosa/apps/logger/xform_instance_parser.py
 #	kobo/apps/openrosa/libs/utils/logger_tools.py
@noliveleger noliveleger changed the base branch from kobocat-django-app-part-2-refactor-mock-deployment-backend to beta-refactored August 26, 2024 15:05
@rajpatel24 rajpatel24 force-pushed the 862-reject_duplicate_submissions branch 2 times, most recently from bf597d5 to 2958052 Compare September 3, 2024 10:51
- Add test case for duplicate submission with an attachment
- Improve logic to extract UUID from xml
- Add logic to reject submission without UUID
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kobo/apps/openrosa/apps/logger/tests/test_parsing.py Outdated Show resolved Hide resolved
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@rajpatel24 rajpatel24 force-pushed the 862-reject_duplicate_submissions branch from 648aca5 to 24a51bf Compare September 18, 2024 18:03
@rajpatel24 rajpatel24 force-pushed the 862-reject_duplicate_submissions branch from e7f73d5 to cc37b6c Compare September 19, 2024 14:44
@rajpatel24 rajpatel24 force-pushed the 862-reject_duplicate_submissions branch from b9bf71b to cdc71db Compare September 23, 2024 11:27
@rajpatel24 rajpatel24 force-pushed the 862-reject_duplicate_submissions branch from c87f862 to 86e9313 Compare September 27, 2024 20:15
@noliveleger noliveleger changed the base branch from beta-refactored to main October 7, 2024 18:31
 # Conflicts:
 #	kobo/apps/openrosa/apps/api/tests/viewsets/test_xform_submission_api.py
 #	kobo/apps/openrosa/apps/logger/tests/test_simple_submission.py
 #	kobo/apps/openrosa/apps/logger/xform_instance_parser.py
 #	kobo/apps/openrosa/libs/utils/logger_tools.py
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