How to Resolve "database is locked" Error in Go GORM / SQLite
Your Go service using GORM with SQLite throws "database is locked" under any real concurrent load, even though the same queries work fine one at a time. SQLite...
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Go "Fatal Error: Concurrent Map Writes" in HTTP Handler
"Concurrent map writes" specifically inside an HTTP handler is an especially common version of Go's map-safety crash, because every incoming HTTP request in...
Go http.Client Memory Leak Due to Missing resp.Body.Close()
A gradually growing memory footprint in a Go application making many HTTP requests is one of the most common Go memory leak patterns, and it almost always...
Go Module Path Mismatch Error "Module Declares Its Path as X but Loaded as Y"
This error means the module path declared in a project's go.mod file doesn't match the import path Go is actually trying to use to reach it — Go requires these...
JWT Algorithm Confusion Vulnerability (HS256 vs RS256), Basic Explanation
The JWT algorithm confusion vulnerability exploits a library or application that trusts the algorithm specified inside the token itself, rather than enforcing...
Go "Cannot Use X as Type Y in Assignment" Interface Mismatch
This compile-time error means a value doesn't actually satisfy the interface (or type) you're trying to assign it to — Go's static type checking catches this...
Go "Concurrent Map Read and Map Write" Fatal Error Crash
Go's built-in maps are explicitly not safe for concurrent use — reading and writing the same map from multiple goroutines simultaneously, without...
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...
Go Channel Deadlock: Fatal Error "All Goroutines Are Asleep"
Unlike a panic, "all goroutines are asleep - deadlock!" is a fatal error the Go runtime itself detects when literally every goroutine in the program is blocked...