How to Fix Nginx 502 Bad Gateway on AWS ALB / CloudFront Upstream Connection
Nginx returns 502 errors specifically when deployed behind AWS Application Load Balancer or CloudFront, even though the same Nginx configuration works fine...
Search
52 results for "Timeout"
How to Fix Nginx WebSockets "Connection: Upgrade" Header Dropped Behind Load Balancer
WebSocket connections work fine when testing directly against Nginx, but fail once a load balancer (ALB, ELB, or another reverse proxy) sits in front of it....
How to Fix Gin Server Graceful Shutdown Timing Out on Kubernetes Pod Termination
When Kubernetes terminates a pod running your Gin service, requests get abruptly cut off instead of finishing cleanly, and you may see connection reset errors...
How to Fix Go net/http Client Leaking File Descriptors Under Heavy Load
Your Go service makes a lot of outbound HTTP requests, and under sustained load, it starts hitting file descriptor limits or degraded performance over time....
How to Fix "AttributeError: 'NoneType' Object Has No Attribute" Error
Your code calls a method or accesses a property on a variable that turns out to be None instead of the object you expected. This is one of the most common...
How to Fix "SyntaxError: Non-Default Argument Follows Default Argument"
Defining a function fails before it can even run, with Python's parser rejecting the parameter order outright. Unlike most runtime errors, this one is caught...
How to Resolve "pkill / pg_terminate_backend Not Killing Database Query"
You call pg_terminate_backend() on a runaway query expecting it to stop immediately, but the process lingers, still consuming resources, sometimes for a...
How to Fix "Could Not Connect to Server: Connection Refused" in psql
Running psql fails before you even get to a login prompt, with the connection actively refused rather than timing out or asking for a password. This means...
How to Fix "Nginx 502 Bad Gateway" Error With PHP-FPM or Node.js
Nginx returns a 502 error page instead of your application's response, which means Nginx itself is running fine but couldn't get a valid response from whatever...