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Pull Request Overview
This PR implements a temporary fix for a race condition when creating new users by adding a retry mechanism with exponential backoff. The changes address scenarios where multiple concurrent requests attempt to create the same user simultaneously.
- Adds retry logic with exponential backoff to handle duplicate user creation attempts
- Updates the
createUserfunction to useauthIdas the primary conflict resolution target instead of email - Reorders query conditions to check email first, then
authId
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.
| File | Description |
|---|---|
| packages/app/src/lib/auth.ts | Implements retry mechanism with exponential backoff for user creation |
| packages/app/src/db/crud/user.ts | Updates conflict resolution to use authId as target and reorders query conditions |
| termsOfUseAcceptedAt: new Date(), | ||
| }); | ||
| break; // Success, exit the retry loop | ||
| } catch (error: any) { |
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Using 'any' type for error handling defeats TypeScript's type safety. Consider using 'unknown' or a more specific error type to maintain type safety.
| } catch (error: any) { | |
| } catch (error: unknown) { |
| retryCount++; | ||
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| // If it's a duplicate key error and we haven't exceeded max retries, try again | ||
| if (retryCount < maxRetries) { |
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The retry logic doesn't check for specific error types. This could cause unnecessary retries for errors that aren't related to race conditions (e.g., network errors, validation errors). Consider checking for specific database constraint violation errors before retrying.
| // this is done in transaction to avoid race condition when creating user, for conflicts on authId | ||
| return await db.transaction(async (trx) => { | ||
| // First try to find the user by authId | ||
| // Also check by email to handle edge cases |
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The comment 'Also check by email to handle edge cases' is vague. It should explain what specific edge cases this addresses and why checking both email and authId is necessary.
| // Also check by email to handle edge cases | |
| // Check for an existing user with both the same email and authId. | |
| // This handles edge cases where: | |
| // - A user may have registered with the same email address using different authentication providers (resulting in different authIds). | |
| // - There may be attempts to create duplicate accounts with the same email but different authIds, or vice versa. | |
| // By checking both fields, we ensure that we do not create duplicate user records for the same logical user across different auth providers. |
| target: [user.authId], | ||
| set: { | ||
| authId: userInsert.authId, | ||
| email: userInsert.email, |
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Changing the conflict target from email to authId could have unintended consequences. If the same email is used with different authIds, this will now allow duplicate emails instead of updating the existing user's authId. This seems inconsistent with the original logic.
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