prodopsy Summary The issue presented is a “Working directory has unstaged changes” error when attempting to push commits to a GIT repository, despite the working directory being clean and having no unstaged changes. This error occurs during the push operation, specifically when using the –force-with-lease option, and is reported by the remote repository. Root Cause The … Read more
Summary The UnboundLocalError in Python occurs when a variable is referenced before it is assigned a value within a local scope. In the context of the provided example, this error arises when attempting to update a variable from an outer function (closure) within an inner function. The issue stems from Python’s scoping rules, which treat … Read more
The question revolves around the possibility of creating a custom driver for Citus, a sharded PostgreSQL solution, to enable clients to query shards directly, thereby bypassing the coordinator node. This inquiry stems from concerns about the coordinator’s role as a potential single point of failure and its impact on throughput. Root The root cause of … Read more
# Postmortem: Inability to Access SSL Certificate Attributes in Dart http ## During a routine API call using Dart’s `http` package, an engineer attempted to read the SSL certificate attributes (subject, issuer, serial number) of the server after a successful HTTPS request. The operation failed because the `http` package does not expose this information through … Read more
# Production Postmortem: Unreleased WebSocket Connections Preventing Garbage ## A JavaScript WebSocket implementation was leaking connections because new connections were created without closing existing ones. Overwriting the reference to the old connection did not automatically trigger garbage collection or socket cleanup, leading to resource exhaustion. ## Root – The `ws` variable was reassigned to a … Read more
Unexpected MySQL Boolean Full-Text Search behavior where tilde ~ operator boosts relevance scores instead of demoting Observed in MySQL 8.0.40 when using MATCH() AGAINST(… IN BOOLEAN MODE) with ~term Contradicts official MySQL documentation stating ~ should decrease relevance Root Term demotion via ~ doesn’t function as pure subtraction in relevance Relevance scores are composites of: … Read more
## Python scripts failing with `ModuleNotFoundError: No module named ‘requests’` despite successful installation via `pip`. The core issue is **environment mismatch**: the Python interpreter used at runtime differs from the one associated with the `pip` that installed the package. Common triggers include multiple Python installations and IDE misconfiguration. ## Root – **Interpreter-`pip` misalignment**: Commands run … Read more
# Preventing Overheating When Using Pathway Library in ## Experiencing laptop shutdowns during Pathway library execution in VS Code due to overheating caused by uncontrolled resource consumption during data processing pipelines. ## Root – Pathway’s default execution settings aggressively utilize all available CPU – Memory-intensive operations exceed local machine – Lack of resource constraints leads … Read more
# Postmortem: Broken Product Model Search Functionality in ## When users clicked a product’s model number on the OpenCart product page, it failed to perform a search or display results. The existing code (“{{ text_model }} {{ model }}“) only displayed plain text without interactive functionality. ## Root – The template rendered static text instead … Read more
# Postmortem: Serial Data Corruption in Windows API Read ## A C++ application using Windows API for serial communication experienced intermittent data corruption when reading from an Arduino device. Data was clean only when Arduino’s transmission delay was excessively high (1000ms), making real-time control impractical. ## Root Mismatched serial configuration between Arduino and C++ application: … Read more