errTooManyIdleHost = errors.New("http: putIdleConn: too many idle connections for host")
errCloseIdleConns = errors.New("http: CloseIdleConnections called")
errReadLoopExiting = errors.New("http: persistConn.readLoop exiting")
- errServerClosedIdle = errors.New("http: server closed idle connection")
errIdleConnTimeout = errors.New("http: idle connection timeout")
errNotCachingH2Conn = errors.New("http: not caching alternate protocol's connections")
+
+ // errServerClosedIdle is not seen by users for idempotent requests, but may be
+ // seen by a user if the server shuts down an idle connection and sends its FIN
+ // in flight with already-written POST body bytes from the client.
+ // See https://github.com/golang/go/issues/19943#issuecomment-355607646
+ errServerClosedIdle = errors.New("http: server closed idle connection")
)
// transportReadFromServerError is used by Transport.readLoop when the