Fix goroutine leaks, context cancellation, DB pool issues, concurrency bugs, microservices, and production Go problems
Your service spawns goroutines on every request but never cancels them when clients disconnect. This causes memory leaks and growing goroutine count.
sql.DB is a global pooled connection manager. Creating a new pool per request exhausts DB connections.
Not closing resp.Body leads to TCP exhaustion and hanging microservices.
Go maps panic on concurrent write. Protect with mutex or sync.Map.
HTTP calls without timeout cause hung goroutines and cascading failures.
Method dereferences pointer without nil check, causing panic in production.
sql.Rows are not closed, causing connection pool exhaustion.
Multiple goroutines write to map concurrently without synchronization.
Panic in goroutine crashes entire program because panic is not recovered.
Unbuffered channel blocks sender when no receiver is ready, causing deadlock.
Channel is never closed, causing goroutines to wait forever and leak memory.
Multiple goroutines append to same slice without synchronization, causing data corruption.
Context is not passed through function calls, preventing cancellation propagation.
Server doesn't handle shutdown signals, causing connections to be dropped abruptly.
Type doesn't satisfy interface but error only discovered at runtime.
Large structs are retained in memory through references, preventing garbage collection.
Goroutines block forever on channel operations when no one reads/writes, causing leaks.
Multiple goroutines increment counter without synchronization, causing lost updates.
HTTP client has no timeout, causing requests to hang indefinitely.
Queries are constructed by string concatenation, vulnerable to SQL injection.
Unmarshaling JSON into interface{} requires type assertion, which can fail at runtime.
Files are opened but never closed, causing file descriptor exhaustion.
WaitGroup is not used correctly, causing main to exit before goroutines complete.
Context timeout errors are not handled, causing operations to fail silently.
Same goroutine locks mutex twice, causing deadlock.
Type doesn't implement interface method signature correctly, causing compile error.