Diagnosing Docker Container High CPU Usage on Linux and Windows
Learn to diagnose and stop a single Docker container from consuming excessive CPU on Linux and Windows hosts, using process-level inspection and resource limits.
5 min read
Blog
Notes from running things in production
What actually happens when an AI agent is pointed at a live server: what it can do, where it has to stop and ask, and the failures worth knowing about first.
nginx 502 Bad Gateway: Upstream Connection Refused
When nginx returns 502 and the error log shows connect() failed (111: Connection refused), the upstream service is not listening. This guide shows how to confirm the refused upstream, locate the active vhost, and choose between restarting the service or fixing the proxy_pass port.
9 min read
Docker Daemon Not Responding: Diagnose and Recover
Troubleshoot an unresponsive Docker daemon on Linux and Windows: confirm the hang, check processes and logs, find resource pressure, restart safely, and prevent recurrence.
7 min read
Docker Container Cannot Access Internet: Fix
Step-by-step troubleshooting for Docker containers on Linux and Windows. Isolate DNS, network mode, and firewall issues, then apply the matching fix.
8 min read
Tomcat 404 After Deploying WAR Context Path Mismatch: Fix It
A practical guide to diagnosing and fixing Tomcat 404 errors after WAR deployment by verifying the effective context path using log and configuration inspection, with manual steps and AI-assisted log reading.
5 min read