fix(source-mssql): classify Azure read-replica error 3947 as transient by yardencarmeli · Pull Request #78415 · airbytehq/airbyte

Yarden Carmeli (yardencarmeli) · 2026-05-25T14:35:57Z

What

Fixes 12596

Syncs using Azure SQL read replicas intermittently fail with:
com.microsoft.sqlserver.jdbc.SQLServerException: The service has encountered an error processing your request. Please try again. Error code 3947.
The error currently fails the sync when it should retry.

How

Classify error 3947 as transient to retry the sync instead of immediate failure.
This is based on Microsoft's documentation https://learn.microsoft.com/en-us/azure/azure-sql/database/read-scale-out?view=azuresql

Review guide

User Impact

Can this PR be safely reverted and rolled back?

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NO ❌

Important

Active progressive rollout warning for source-mssql.

(Click to Approve:) Bypass the active progressive rollout warning for source-mssql in the PR comment here.

github-actions · 2026-05-25T14:36:23Z

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github-actions · 2026-05-25T14:38:11Z

Detected `source-mssql` Active Rollout: `true`

Important

Active progressive rollout warning for source-mssql.

To bypass this warning, click on the matching checkbox in the PR description. Look for the checkbox text:

(Click to Approve:) Bypass the active progressive rollout warning for source-mssql in the PR comment

Rollout version: 4.3.0-rc.10
Rollout state: initialized
Rollout last updated by: unknown
Open Connector Rollout Manager in Retool to clean up or close out this rollout if appropriate.

Version on `master` Branch: `4.4.8`

RC marker on master branch: false

PR Description Checkbox Status

Bypass checkbox checked: true

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🤔 What happens if this PR is merged

Checking the checkbox will allow the PR to merge, but it does not necessarily stop the active rollout by itself. The result of the PR merging depends on what connector version is published.

Expected outcomes by type of version number change:

If connector version is not modified in this PR...

No new connector version should be released, and the active rollout should continue unchanged.

If the connector version increments to a higher `-rc` version...

After this PR is merged, the new RC will be published and registered, replacing the active RC marker. When the new RC is registered, the platform cancels any existing non-terminal rollout for this connector without unpinning actors.

After merging, you still need to start the new rollout. During start, pinned actors from the previous rollout can be moved to the new RC.

If the connector version changes from RC to non-RC (GA) version...

You should not merge the PR unless/until the RC has been finalized as canceled. See above Rollout state for detected status.

[!Warning]
This PR should not be merged if the RC rollout is still active. First finalize the active rollout as successful or cancel it in Connector Rollout Manager.

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To rerun the check, simply check and uncheck the box, or else modify the PR description and/or title in any way.

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Workflow run

github-actions · 2026-05-25T14:41:20Z

`source-mssql` Connector Test Results

12 files 12 suites 47s ⏱️
116 tests 116 ✅ 0 💤 0 ❌
226 runs 226 ✅ 0 💤 0 ❌

Results for commit 17649e2.

♻️ This comment has been updated with latest results.

github-actions · 2026-05-25T14:41:43Z

Deploy preview for airbyte-docs ready!

Project:	`airbyte-docs`
Status:	✅ Deploy successful!
Preview URL:	https://airbyte-docs-29clcvzov-airbyte-growth.vercel.app
Latest Commit:	`17649e2`

Deployed with vercel-action

devin-ai-integration · 2026-05-26T11:45:42Z

↪️ Triggering /ai-prove-fix per Hands-Free AI Triage Project triage next step.

Reason: Draft source-mssql fix PR has passing connector tests; only rollout-gate checks are failing due to an active rollout. Prove-fix is still the next validation stage.

https://github.com/airbytehq/oncall/issues/12596

Devin session

devin-ai-integration · 2026-05-26T11:51:40Z

↪️ Intended to trigger /ai-prove-fix per Hands-Free AI Triage Project triage next step, but workflow dispatch is currently failing for AI command workflows.

Reason: Draft source-mssql fix PR has passing connector tests; only rollout-gate checks are failing due to an active rollout. Prove-fix is still the next validation stage.

Operational note: GitHub workflow_dispatch returned HTTP 500/403 with the configured trigger token; repository_dispatch does not start this workflow because the workflow does not subscribe to repository_dispatch. This has been reported as an Ops MCP/workflow blocker.

https://github.com/airbytehq/oncall/issues/12596

Devin session

fix(source-mssql): classify Azure read-replica error 3947 as transient

8ebe8a3

Octavia Squidington III (octavia-squidington-iii) added the connectors/source/mssql label May 25, 2026

update changelog

17649e2

Yarden Carmeli (yardencarmeli) requested a review from Rodi Reich Zilberman (rodireich) May 25, 2026 14:36

Rodi Reich Zilberman (rodireich) approved these changes May 26, 2026

View reviewed changes

Yarden Carmeli (yardencarmeli) marked this pull request as ready for review May 26, 2026 18:28

Yarden Carmeli (yardencarmeli) merged commit 48dc5dd into master May 26, 2026
56 of 58 checks passed

Yarden Carmeli (yardencarmeli) deleted the yarden/source-mssql-translate-error-3947 branch May 26, 2026 18:29

This was referenced May 26, 2026

docs(source-mssql): document Azure read replica retries #77788

Draft

fix(source-mssql, cdc): Set store.only.captured.tables.ddl to avoid schema history bloat #78223

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fix(source-mssql): classify Azure read-replica error 3947 as transient#78415

fix(source-mssql): classify Azure read-replica error 3947 as transient#78415
Yarden Carmeli (yardencarmeli) merged 2 commits into
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yarden/source-mssql-translate-error-3947

Yarden Carmeli (yardencarmeli) commented May 25, 2026 •

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Detected source-mssql Active Rollout: true

Version on master Branch: 4.4.8

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Yarden Carmeli (yardencarmeli) commented May 25, 2026 •

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github-actions Bot commented May 25, 2026 •

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Detected `source-mssql` Active Rollout: `true`

Version on `master` Branch: `4.4.8`

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`source-mssql` Connector Test Results