Auto-generated GRPC classes aren’t accessible as source folders in EclipseIDE, but exist

by

Summary The developer was unable to reference generated GRPC classes from the build/generated/sources/proto/main/grpc folder within the Eclipse IDE, despite them being present on the filesystem. Gradle’s compileJava task worked fine. The root cause was a race condition between the Gradle Eclipse plugin configuration and the Eclipse Buildship plugin, where Buildship’s default import logic overwrote the … Read more

When should git rebase be avoided in a shared repository?

by

Summary Git rebase can be a powerful tool for maintaining a clean commit history, but it can be dangerous in a shared repository. When working in a team environment, it’s essential to understand the risks of rebasing and the potential impact on collaborators’ history. In this article, we’ll explore the best practices for using git … Read more

ISTIO – Virtual service to virtual service routing

by

Summary A common misconfiguration occurs when attempting to route traffic directly from one Istio VirtualService (VS) to another by referencing the downstream VS’s hostname in the upstream VS’s destination. This pattern results in no healthy upstream 503 errors because the upstream VirtualService does not “call” the downstream VirtualService; it only resolves to Kubernetes Services or … Read more

Openpyxl deletes all cells values and styles that are below my inserted values

by

Summary The issue occurs because inserting rows shifts existing row indices downward, but the code continues to write to the original, calculated indices. In openpyxl, inserting rows at a specific point physically moves existing rows down to make space. Data written to the original row numbers after insertion overwrites what used to be there or … Read more

Python: find strings with longest common prefix

by

Summary A developer asked for a “simple” Python solution to find strings in a list that share the longest common prefix with a given input string. While simple one-liners exist, they hide catastrophic performance pitfalls and memory exhaustion risks in production environments. The core task requires comparing an input string against a list of candidates … Read more

Substrings in python

by

Summary A candidate submitted a Python script intended to identify all strings from an input file that appear as a substring of at least one other distinct string in the list. The script uses nested loops and the in operator to perform this check. While the code syntactically functions, the underlying algorithmic approach and file … Read more

404/405 results using HttpClient in c# to upload/rename/delete files on a web server

by

Summary This postmortem addresses a common architectural misunderstanding when migrating from legacy WebClient/WebRequest APIs to HttpClient in .NET 9. The developer encountered 404 (Not Found) and 405 (Method Not Allowed) errors while attempting to perform file operations (Upload, Rename, Delete) on an IIS 10 web server. The core issue is not a code syntax error, … Read more

Solving conflicting react router redirects

by

Summary The user is experiencing a race condition between the React Router navigate function and the Redux state update triggered by dispatch(logout()). The attempt to navigate to the homepage (/) in Header.jsx is being immediately overridden by the ProtectedRoute component. When the user clicks “Sign Out” on the /profile page: navigate(“/”) is called. dispatch(logout()) is … Read more

Substrings and Highest score, python

by

Summary This postmortem article discusses two Python programs that were written to solve specific problems, but contained errors that led to their failure. The first program was designed to read strings from a file and write to an output file all strings that appear as a substring of at least one other string in the … Read more