Databases
Context Cancellation and Query Timeouts in Go SQL Code
Put a deadline on every Go database call: a 200 ms context cancels a 5 second query on the server too, and statement_timeout is the backstop.
7 min read
Tag
context
13 articles
Testing
Test Context Cancellation and Timeouts in Go Code Properly
Test that Go code stops when its context is cancelled or times out: short deadlines, errors.Is, WithCancelCause and a guard timeout so a hang fails fast.
7 min read
Basics
Context Canceled Error in Go and Who Is Cancelling It
Find who cancelled a context in Go and fix the error: client disconnects, a deferred cancel that runs too early, errgroup siblings and detached work.
7 min read
Concurrency
Context Cancellation Done Right in Go Web Services
Use context cancellation properly in a Go web service: pass r.Context down, set deadlines in middleware, stop streaming loops, detach background work.
9 min read
Web
Request Context in Go Handlers and Client Disconnects
When r.Context() is cancelled in a Go handler, what it saves downstream, and why an HTTP/1 handler that never reads the body never sees a disconnect.
7 min read
Basics
Add Context to Errors in Go Without Stack Trace Noise
Add useful context to Go errors: what to say at each layer, what the standard library already says, how to avoid stutter, and when to use fields.
6 min read
Concurrency
Context Cause and WithCancelCause Added in Go 1.20
Use context.WithCancelCause and context.Cause from Go 1.20 to record why a context ended, with timeout causes from Go 1.21 and a fan-out pattern.
4 min read
Concurrency
Context WithTimeout vs WithDeadline in Go Compared
Compare context.WithTimeout and WithDeadline in Go: the same mechanism, how to choose, how deadlines nest, and how to share one budget across calls.
8 min read
Concurrency
AfterFunc and WithoutCancel Context Helpers in Go 1.21
Use context.AfterFunc to run cleanup when a context ends and context.WithoutCancel to detach work from a request, with runnable examples and traps.
4 min read
Basics
Errors and Context Cancellation in Go Programs Explained
How context.Canceled and context.DeadlineExceeded travel through Go code, how to test for them after wrapping, and how Cause records why a context ended.
7 min read
Editor's pick
ConcurrencyGuide
Context in Go From Simple Cancellation to Deadlines
A guide to context in Go: the Context interface, cancel trees, timeouts and deadlines, values, passing rules, HTTP and database use, and common mistakes.
12 min read
Concurrency
Context Values in Go and What Should Never Go Inside
When to use context.WithValue in Go: request IDs and identity, typed keys and accessors, collision traps, lookup cost, and what to keep out of the context.
7 min read