Production Bugs

The server was successfully reached, but it cannot find any data or endpoint at the specific URL path provided (/api/auth/check)

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Summary A frontend application attempting to validate user authentication triggered a 404 Not Found error when calling the endpoint /api/auth/check. The error surfaced as an AxiosError with code ERR_BAD_REQUEST. The root cause was a mismatch between the client’s expected API location and the server’s actual routing configuration. Although the server was reachable, the specific URL … Read more

Python Tuple Importance?

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Summary A developer questioned the practical importance of Python tuples, noting that elements can be added by converting to a list and back to a tuple. The core issue is a misunderstanding of immutability and its role in data integrity. Tuples are not meant to be mutated; they are used to ensure data remains constant. … Read more

Docker Compose: correct config for MariaDB + MongoDB + Qdrant (ports, env vars, volumes) and how containers should connect?

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Summary This postmortem analyzes a common misconfiguration when orchestrating a multi-database local development environment using Docker Compose. The primary failure observed is a lack of inter-container networking knowledge, leading to containers attempting to connect to databases via localhost rather than the Docker Compose service name. This results in “Connection Refused” errors. The correct approach involves … Read more

Performance implications of compact representations

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Summary This postmortem analyzes the performance tradeoffs between compact bit-packed representations (using bitmasks and shifts) and expanded aligned representations (fat capabilities) for capabilities in a CHERI-like architecture. The key finding is that memory locality and cache efficiency dominate raw ALU cost, making compact representations generally superior in real systems despite requiring more bitwise operations. However, … Read more

Angular SSR + Firebase App Hosting: build fails when importing shared utility functions

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Summary The issue at hand is an Angular SSR application that fails to build when deploying to Firebase App Hosting due to unresolved imports of shared utility functions. Key Takeaways include understanding how Angular SSR and Firebase App Hosting interact, and how to properly configure imports for shared functions. Root Cause The root cause of … Read more

Best practice for enqueueing CSS and JavaScript files in a custom WordPress theme

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Summary The question asks for best practices for enqueueing CSS and JavaScript files in a custom WordPress theme. The core issue addressed is replacing direct HTML <link> and <script> tags in header.php with WordPress’s native functions for asset management. The recommended approach uses functions.php and the wp_enqueue_style() and wp_enqueue_script() functions. This method leverages WordPress’s internal … Read more

conversion api retunrs error 400 – The access token could not be decrypted

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Summary The error 400 Bad Request with {“error”: {“message”: “The access token could not be decrypted”, “type”: “OAuthException”, “code”: 190}} indicates that the access token provided to the Facebook Graph API is either invalid, expired, or malformed. Despite the user generating the token in Events Manager, the token is likely a System User Access Token … Read more

How to assign storefront role while registration in OSF – Oracle Commerce cloud

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Summary In Oracle Commerce Cloud (B2B), assigning a storefront role during registration requires orchestrating specific APIs across the ccstore and ccadmin scopes. The process diverges depending on whether the user is creating a new account (self-registration) or a new contact under an existing organization (requiring approval). The critical path involves creating the user profile first, … Read more