go resource_error ai_generated true

runtime: goroutine leak: net/http.(*persistConn).readLoop stuck

ID: go/goroutine-leak-http-body

Also available as: JSON · Markdown · 中文
80%Fix Rate
87%Confidence
0Evidence
2024-07-03First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.18 active — — —
1.22 active — — —

Root Cause

HTTP response bodies are not closed, causing persistent connection goroutines to remain blocked reading.

generic

中文

HTTP 响应体未关闭，导致持久连接 goroutine 一直阻塞在读取上。

Workarounds

  1. 95% success 
    resp, err := client.Do(req)
if err != nil { return err }
defer resp.Body.Close()
io.Copy(io.Discard, resp.Body)
  2. 88% success 
    ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
req = req.WithContext(ctx)

Dead Ends

Common approaches that don't work:

  1. 75% fail

    Timeout does not close the body; the readLoop goroutine still leaks.

  2. 80% fail

    Reusing the client does not fix unclosed bodies.