go runtime_error ai_generated true

error: context canceled（取消后 goroutine 阻塞在 channel 发送上）

error: context canceled (goroutine blocked on channel send after cancellation)

ID: go/context-canceled-while-sending

其他格式: JSON · Markdown 中文 · English
80%修复率
87%置信度
0证据数
2024-10-01首次发现

版本兼容性

版本状态引入弃用备注
1.7+ active — — —

根因分析

goroutine 在 context 被取消后仍向 channel 发送数据，而接收方已停止消费，导致阻塞或工作丢失。

English

A goroutine keeps sending to a channel after its context is canceled, and the receiver has stopped draining, causing a block or lost work.

generic

解决方案

  1. 94% 成功率 
    select {
case ch <- v:
case <-ctx.Done():
    return ctx.Err()
}
  2. 90% 成功率 
    g, ctx := errgroup.WithContext(ctx)
g.Go(func() error { return producer(ctx, ch) })
return g.Wait()

无效尝试

常见但无效的做法:

  1. 80% 失败

    Continues to block on a full channel and wastes resources; the cancellation is not honored.

  2. 75% 失败

    Closing while senders are active panics with send on closed channel.