go resource_error ai_generated true

goroutine 泄漏: N 个 goroutine 阻塞在 chan receive（pprof 显示 [chan receive]）

goroutine leak: N goroutines blocked in chan receive (pprof shows [chan receive])

ID: go/goroutine-leak-blocked-receive

其他格式: JSON · Markdown 中文 · English
80%修复率
87%置信度
0证据数
2024-09-03首次发现

版本兼容性

版本状态引入弃用备注
1.0+ active — — —

根因分析

启动了从 channel 读取的 worker，但该 channel 从未被关闭也从未写入，导致它们永久阻塞在接收上。

English

Workers were started to read from a channel that was never closed and never written to, so they block on receive forever.

generic

解决方案

  1. 96% 成功率 
    go func() {
    defer close(ch)
    for _, x := range items { ch <- x }
}()
for v := range ch { process(v) }
  2. 94% 成功率 
    for {
    select {
    case v, ok := <-ch:
        if !ok { return }
        process(v)
    case <-ctx.Done():
        return
    }
}

无效尝试

常见但无效的做法:

  1. 60% 失败

    If the loop uses for v := range ch, time.After cannot be applied; converting to select changes semantics and still leaks if done incorrectly.

  2. 85% 失败

    Masks the leak; goroutine count still grows within the interval and can OOM under bursts.