Go http.Client Timeout Not Working or Leaking Connections
Two distinct but commonly confused issues affect Go's http.Client: a configured timeout that doesn't actually seem to apply, and connections that leak over...
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PostgreSQL Connection Closed Unexpectedly During Large Transaction
A connection dropping specifically during a large, long-running transaction usually comes down to one of a few specific limits being hit — a statement timeout,...
Rate Limit 429 Too Many Requests Bypass During Load Testing
Getting rate-limited while load testing your own API is expected behavior — the rate limiter is doing its job — and the correct fix is configuring a...
MySQL "Lock Wait Timeout Exceeded" Try Restarting Transaction
"Lock wait timeout exceeded" is different from a deadlock — it means your transaction waited the full configured timeout for a lock held by another...
Bash Script Fails With "$'\r': Command Not Found" (CRLF Line Endings)
The $'\r': command not found error is a strong, specific signal of Windows-style line endings (CRLF) in a script meant to run on Linux/Unix, which expects...
Nginx 504 Gateway Timeout on Long-Running API Request
A 504 Gateway Timeout on a request that's legitimately slow (a large report generation, a heavy computation, a batch operation) means Nginx gave up waiting for...
Nginx WebSockets Connection Failing With 400 Bad Request
A WebSocket connection failing with 400 Bad Request through Nginx almost always means Nginx isn't forwarding the specific headers required for the...
Gin Custom Validation Error Messages Returning Raw Internal Errors
When Gin's binding validation errors are returned to clients as raw, unfriendly text straight from the underlying validator library, it's because the default...
Postgres "LOCK TABLE" Deadlock Waiting Forever
An explicit LOCK TABLE statement that just hangs, rather than producing Postgres's usual automatic deadlock error, usually means it's waiting on a lock held by...