go resource_error ai_generated true

warning: goroutine leak detected (in goroutine 5)

ID: go/goroutine-leak-without-waitgroup

Also available as: JSON · Markdown · 中文
80%Fix Rate
84%Confidence
0Evidence
2024-07-11First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.22 active — — —

Root Cause

Goroutines that never exit due to blocked channel operations or infinite loops leak memory.

generic

中文

由于通道操作阻塞或无限循环而永不退出的 goroutine 会导致内存泄漏。

Workarounds

  1. 95% success 
    var wg sync.WaitGroup
wg.Add(1)
go func() {
    defer wg.Done()
    // do work
}()
wg.Wait()
  2. 90% success 
    ctx, cancel := context.WithCancel(context.Background())
go func() {
    select {
    case <-ctx.Done():
        return
    case <-time.After(time.Second):
        // work
    }
}()
cancel()

Dead Ends

Common approaches that don't work:

  1. 100% fail

    GC doesn't collect goroutines; they are not garbage.

  2. 90% fail

    Temporary mitigation; eventually memory exhausts.

  3. 80% fail

    Leaks accumulate, causing OOM crashes.