go network_error ai_generated true

rpc 错误：code = Canceled desc = 上下文已取消

rpc error: code = Canceled desc = context canceled

ID: go/grpc-canceled-context-canceled

其他格式: JSON · Markdown 中文 · English
80%修复率
86%置信度
0证据数
2024-07-21首次发现

版本兼容性

版本状态引入弃用备注
1.x active — — —

根因分析

传给 RPC 的上下文在完成前被取消，可能由显式 cancel() 调用、父上下文取消，或客户端拦截器引起。服务器感知到取消并中止处理程序。

English

The context passed to the RPC was canceled before completion, either by an explicit cancel() call, a parent context canceling, or a client-side interceptor. The server sees the cancellation and aborts the handler.

generic

解决方案

  1. 88% 成功率 
    Derive a fresh context for retries and never reuse a canceled parent:

ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
resp, err := client.Do(ctx, req)
if status.Code(err) == codes.Canceled {
    // parent was canceled; abort cleanly, don't retry with same ctx
}
  2. 82% 成功率 
    Trace where the cancel is coming from — check for deferred cancel() firing too early or a request-scoped context tied to an HTTP handler that already returned:

// ensure cancel() is deferred AFTER the RPC completes, not before
ctx, cancel := context.WithTimeout(r.Context(), time.Second)
defer cancel()
resp, err := client.Do(ctx, req)

无效尝试

常见但无效的做法:

  1. 95% 失败

    The context is already done; every call with it returns Canceled immediately without even reaching the server.

  2. 90% 失败

    A canceled RPC returns a nil/zero response; proceeding as if it succeeded produces corrupt state downstream.