go runtime_error ai_generated true

fatal error: all goroutines are asleep - deadlock!

ID: go/goroutine-deadlock-all-goroutines-asleep

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
0Evidence
2024-03-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.21 active — — —
1.22 active — — —

Root Cause

All goroutines are blocked waiting on channels or locks with no possibility of progress, typically due to circular dependencies or missing sends/receives.

generic

中文

所有协程都在等待通道或锁，无法继续执行，通常是由于循环依赖或缺少发送/接收操作。

Workarounds

  1. 99% success Ensure each channel send has a corresponding receive in another goroutine 
    ch := make(chan int)
go func() {
    ch <- 1
}()
result := <-ch
  2. 85% success Use buffered channels to avoid blocking 
    ch := make(chan int, 1)
ch <- 1
// no receiver needed immediately

Dead Ends

Common approaches that don't work:

  1. Adding more goroutines to break the deadlock 95% fail

    More goroutines will also block if they follow the same pattern, exacerbating the issue.

  2. Using time.Sleep to wait for conditions 90% fail

    Sleep does not resolve the fundamental blocking; it only delays the deadlock detection.