Production Bugs

YouTube Transcript API returns “Could not retrieve a transcript” error – IP blocking or rate limiting?

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Summary YouTube’s Transcript API returned “Could not retrieve a transcript” errors after ~40 requests, blocking access to all videos. The issue persisted despite using a residential ISP, indicating IP-based rate limiting or blocking by YouTube. Root Cause Rate limiting enforcement: YouTube’s API imposes unpublished rate limits to prevent abuse. IP-based blocking: Excessive requests from a … Read more

How do I return the PID of an osascript call from within a function (or how do I create a persistent notification I can kill later in the script)?

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Summary This incident revolves around a Bash subshell side effect: when you wrap a function call in $(…), the function executes in a subshell, and any variables set inside it—including your captured PID—are lost when the subshell exits. The result is a mysteriously empty PID variable, even though the logic appears correct. Root Cause The … Read more

How can I run the MADDPG example from AgileRL?

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Summary This postmortem analyzes why running the MADDPG example from AgileRL fails on Fedora 43 and inside a Podman/Ubuntu container, focusing on the underlying C++ toolchain mismatch that prevents multi_agent_ale from compiling. The failure is not caused by AgileRL itself but by ABI, compiler, and Python/C++ extension incompatibilities. Root Cause The core issue is a … Read more

Accessibility heading not work on Android 16(SDK 36) devices

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Summary A regression in Android 16 (API 36) prevents isHeading from being honored on TextView elements, even when using AccessibilityDelegateCompat or ViewCompat.setAccessibilityHeading. This behavior works on earlier Android versions but silently fails on API 36. Root Cause Android 16 introduces changes to accessibility behavior that affect how heading metadata is interpreted. Internal platform changes in … Read more

Unexplained Scala compiler behavior (3.7.4)

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Summary This incident revolves around unexpected differences in how Scala 3 infers types when calling contains on Set. Although the API signatures appear straightforward, Scala’s type inference and literal typing rules create surprising behavior. The result: two expressions that look identical do not compile the same way. Root Cause The root cause is a combination … Read more

Autocad floor plans explode

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Summary This incident involved an AutoCAD user attempting to explode a single block containing multiple floor plans, only to find that the block repeatedly returned to its original state. The behavior was confusing but ultimately expected given how nested blocks and block definitions work in AutoCAD. Root Cause The underlying issue was nested block structures … Read more

Please, someone help me to calculate Potential Evapotranspiration (PET) using raster temperature?

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Summary This postmortem analyzes a failure that occurred when attempting to compute Potential Evapotranspiration (PET) using the Thornthwaite method in R. The issue stemmed from incorrectly deriving per‑pixel latitude from a raster stack, leading to invalid PET outputs and runtime errors. Root Cause The root cause was the misuse of: yFromCell(Temperature_stack, 1:nrow(Temperature_stack)) This call returns … Read more

How to specify which granular token to use when publishing the npm package such as avoid to be prompted for authentication?

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Summary The issue at hand is how to specify a granular npm token when publishing an npm package to avoid being prompted for authentication. This is particularly important for CI/CD tools where automated publication is required without any user interaction. Root Cause The root cause of this issue is the lack of understanding of how … Read more

Is YouTube Data API v3 channel ID unique?

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Summary YouTube Data API v3 channel IDs are unique, permanent, and non-reusable, making them suitable as primary keys in database designs. However, edge cases exist, and understanding their behavior is critical for data integrity. Root Cause The question stems from uncertainty about YouTube’s channel ID management. Key concerns include: Uniqueness: Can duplicates occur? Immutability: Can … Read more

Trying to add class to a div on scroll but nothing happens

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Summary This incident involved a scroll‑triggered class toggle that never fired, preventing a full‑screen hero image from transitioning into a smaller, side‑aligned layout. The failure stemmed from missing JavaScript event handling, incorrect element positioning, and CSS rules that prevented the intended transformation from ever being observable. Root Cause The root cause was that no functional … Read more