Create new Google Calendar with specific user list can modify and all others users can read

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## Summary Integration with Google Calendar API led to duplicated calendars per user instead of creating a single shared calendar. The requirement was one system-owned calendar with **delegated write access** for administrators and **public read access** for all users. Misunderstanding Google Calendar’s ownership model caused redundant calendars. ## Root Cause Google Calendar API requires exactly … Read more

Jenkins Installation in AWS EC2 free tier account

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Summary The process of installing Jenkins on an AWS EC2 instance can be straightforward, but troubleshooting and configuration are crucial steps that often require attention. This article delves into the post-installation steps, focusing on how to check and change the Jenkins port number on an AWS EC2 instance, highlighting common pitfalls and best practices. Root … Read more

My application runs a Liquibase script targeting a remote database to run existing shp2pgsql and psql commands. But Liquibase doesn’t find them there

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Summary The issue arises when running a Liquibase script in a Spring Boot application that targets a remote PostGIS database. The script attempts to execute shp2pgsql and psql commands, but Liquibase fails to find them, resulting in a crash. This occurs because the commands are installed on the PostGIS database pod, but Liquibase is searching … Read more

Error with memberCreatorPostAnalytics endpoint

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Summary The memberCreatorPostAnalytics endpoint is experiencing issues, resulting in ILLEGAL_ARGUMENT and RESOURCE_NOT_FOUND errors when using POST and GET methods, respectively. The error responses suggest that the API is either unable to resolve the request parameters or the resource is not available. Root Cause The root cause of this issue is likely due to: Incorrect request … Read more

WhatsApp Template Message Accepted but Not Delivered (Authentication Exception)

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Summary The WhatsApp Business Platform API endpoint for sending template messages returned a 200 OK response with message_status: “accepted” and a valid wamid. However, messages were undelivered, displaying an “Authentication Exception” in WhatsApp Manager. Crucially: The error occurred only for business-initiated messages (Marketing/Utility templates). Session messages (user-initiated conversations) succeeded. Access tokens, template approvals, and credentials … Read more

How to handle Mapbox GL JS popup click events with custom HTML

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Summary A JavaScript developer encountered non-functional button click events within a Mapbox GL JS popup despite correct popup rendering. The issue arose from attempting to use inline event handlers (onclick) in popup HTML. This approach fails due to Mapbox GL JS’s shadow DOM implementation. Root Cause Inline event handlers are not executed due to Mapbox … Read more

Printing – Python

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Summary This postmortem examines a formatting issue in a Python movie booking system where printing movie listings from a file resulted in unintended blank lines between entries. The root cause was unprocessed newline characters from file-reading operations compounded by Python’s native print behavior. Root Cause The primary cause of inappropriate line gaps was: Reading newline … Read more