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Change the behavior of the range read from abort Tx to blocking on rw conflict#455

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githubzilla wants to merge 4 commits intoeloqdata:mainfrom
githubzilla:range_read_block_on_rw_conflict
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Change the behavior of the range read from abort Tx to blocking on rw conflict#455
githubzilla wants to merge 4 commits intoeloqdata:mainfrom
githubzilla:range_read_block_on_rw_conflict

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@githubzilla githubzilla commented Feb 5, 2026 •
edited by coderabbitai bot
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Summary by CodeRabbit

  • Bug Fixes
    • Improved error messages when configuration files cannot be opened: error output now includes the filename alongside existing error details.
    • Impact: makes it easier to identify which configuration file failed and speeds troubleshooting when startup or configuration loading encounters file-access issues.

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coderabbitai bot commented Feb 5, 2026 •
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Walkthrough

The PR updates the src/mongo/db/modules/eloq/data_substrate submodule commit reference and augments the error message in src/mongo/util/options_parser/options_parser.cpp to include the filename when fopen fails.

Changes

Cohort / File(s) Summary
Submodule Update
src/mongo/db/modules/eloq/data_substrate		 Submodule commit hash updated from f08f56d27fd80f97cd45df73228dcc6782545128 to 537f4683f6d241742e845daffb8f3b56b3cdf4e1. No code/API changes in parent repo.
Error Message Enhancement
src/mongo/util/options_parser/options_parser.cpp		 Expanded the fopen failure error string in readConfigFile to append the filename to the errno description; control flow unchanged.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

Suggested reviewers

  • liunyl
  • yi-xmu

Poem

🐰 I hopped a patch from old to new,
A hash updated, error messages grew.
Filenames now called when fopen fails,
I nibbled bytes and fixed the trails,
Hooray for tiny, tidy code renew!

🚥 Pre-merge checks | ✅ 2 | ❌ 1
❌ Failed checks (1 warning)
Check name Status Explanation Resolution
Title check ⚠️ Warning The pull request title describes changing range read behavior from aborting transactions to blocking on read-write conflicts, but the actual changes only update a subproject reference and enhance an error message in an unrelated config file parser, with no modifications to range read or transaction abort logic. Update the title to accurately reflect the actual changes: either describe the subproject update and error message enhancement, or ensure the code changes match the described range read behavior modification.
✅ Passed checks (2 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage ✅ Passed Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

✏️ Tip: You can configure your own custom pre-merge checks in the settings.

✨ Finishing touches
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  • Post copyable unit tests in a comment

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