testing

One of the hardest bugs I investigated was a database connectivity issue in a Next.js application deployed on Vercel, where the application failed to connect to a PostgreSQL database hosted on Neon.

The first evidence was a P1011 TLS connection error in the logs. I initially considered whether the database credentials were incorrect, whether the database was unavailable, or whether the connection string was malformed.

I ruled out these possibilities by checking the environment variables, verifying the database connection details, and reviewing the Prisma configuration. The key clue was that the application used a Prisma PostgreSQL adapter, and the error pointed toward the TLS connection rather than a typical authentication failure.

I then focused on the connection configuration and the interaction between the adapter, connection string, and database provider. I reviewed the SSL settings and tested the connection configuration to isolate the problem rather than changing multiple things at once.

To confirm a fix, I would verify that the application could establish a database connection, execute representative queries, and handle repeated requests without recurring TLS errors. I learned to use logs to narrow down the failure, rule out likely causes systematically, and validate the solution with repeatable tests instead of relying on a successful deployment alone.