Jetty 12 Startup Time Optimization Using QuickStart module

Summary The Jetty 12 startup time optimization is a critical issue, especially when dealing with a large number of deployments. In this case, the Jetty 12.1.4 version is being used with e11 deployment, and around 36 files (18 wars with mapping 18 context XML configuration files) are deployed in the Jetty server. The startup time … Read more

Lack of semantic abstraction and unreliable tool invocation

Summary The core issue is a breakdown in the semantic abstraction layer between natural language inputs and database execution. In the current setup, the Model Context Protocol (MCP) integration fails to provide a true business-facing abstraction, forcing users to expose physical database schemas. Additionally, the LLM’s tool invocation is non-deterministic; it occasionally bypasses the MCP … Read more

cloudfront-viewer-country-name stopped working in AWS

Summary Between November 18th and 21st, Lambda functions behind CloudFront stopped receiving CloudFront-Viewer-Country-Name headers while CloudFront-Viewer-Country continued to function. The root cause was a change in how CloudFront handles country header formatting. AWS silently changed the format of geolocation headers from hyphenated (CloudFront-Viewer-Country-Name) to lowercase with spaces replaced by underscores (CloudFront-Viewer-Country-Name became CloudFront-Viewer-Country-Name). The Viewer … Read more

Performance of square root calculation – expectation versus reality

Summary A user-level benchmark suggests that math.sqrt(x) is approximately 20% faster than x**0.5 for calculating square roots in Python. While both operations are mathematically equivalent for positive numbers, the performance difference stems from how the Python interpreter and underlying C libraries handle these operations. math.sqrt maps directly to a low-level C library call optimized specifically … Read more

How to swap multiple variables using multiple assignment?

Summary The problem revolves around understanding how multiple assignment works in Python, particularly when swapping values of multiple variables. The key takeaway is that Python’s multiple assignment is a simultaneous operation, meaning all assignments happen at the same time. Root Cause The root cause of confusion lies in misunderstanding the order of operations during multiple … Read more

Handling text input width and making it responsive

Summary The core problem is a mismatch between a fixed-size CSS container and dynamic user input. The developer used a width: 25vw rule on the input, which is a rigid measurement. When the user enters numbers with many digits, the input container stays the same physical width, but the font size is large. Since text-wrap: … Read more

Some users cannot type anything

Summary A critical input failure occurs where some users cannot type into a JTextArea within a JAR deployment, while the same code works in development environments. The root cause is a blocking EDT (Event Dispatch Thread) behavior triggered by the heavy KeyListener logic, causing the UI thread to freeze intermittently or under specific system conditions … Read more