XX-net/XX-Net · warning

get_timeout_list sn:%d sent:%f retry:%f

Error message

get_timeout_list sn:%d sent:%f retry:%f

What it means

Logged in get_timeout_list when an SN has exceeded the timeout both since original send and since last retry, so it is added to the retransmit list and its retry_time is stamped.

Source

Thrown at code/default/x_tunnel/local/base_container.py:355

                self.logger.warn("mark_sn_timeout sn:%d t:%f", sn, server_time - t)
                self.timeout_sn_list[sn] = {
                    "server_send_time": t,
                }
            elif t > self.timeout_sn_list[sn]["server_send_time"]:
                self.logger.warn("mark_sn_timeout renew sn:%d t:%f", sn, server_time - t)
                self.timeout_sn_list[sn]["server_send_time"] = t

    def get_timeout_list(self, server_time, timeout):
        sn_list = []
        with self.lock:
            for sn, info in self.timeout_sn_list.items():
                if server_time - info["server_send_time"] < timeout:
                    continue

                if server_time - info.get("retry_time", server_time) < timeout:
                    continue

                self.logger.warn("get_timeout_list sn:%d sent:%f retry:%f", sn, server_time - info["server_send_time"],
                                 server_time - info.get("retry_time", server_time))
                info["retry_time"] = server_time
                sn_list.append(sn)

        return sn_list

    def is_received(self, sn):
        if sn < self.next_sn:
            return True

        if sn in self.block_list:
            return True

        return False

    def status(self):
        out_string = "Block_receive_pool:\r\n"
        out_string += " next_sn:%d\r\n" % self.next_sn

View on GitHub (pinned to cfa5bc17b6)

Solutions

1. Increase the timeout parameter to comfortably exceed RTT
2. Check for network congestion or MTU issues
3. Check server reachability if all SNs time out at once

When it happens

Trigger: server_time - server_send_time >= timeout AND server_time - retry_time >= timeout for an SN in timeout_sn_list, invoked via get_down_sn_timeout_list_pack.

Common situations: Sustained uplink loss/congestion; timeout configured too small for RTT.

Understand the failure class

• Timeouts: ETIMEDOUT, deadlines, and hung requests — what actually expires when a request times out.

Related errors

• mark_sn_timeout sn:%d t:%f
• mark_sn_timeout renew sn:%d t:%f
• roundtrip failed, no:%d target:%d on_road:%d timeout:%d send
• update_quota_loop timeout fail.
• time out

AI-assisted analysis of XX-net/XX-Net@cfa5bc17b6 (2026-08-27). Data as JSON: /api/errors/b1acc2a2b372b434. Report an issue: GitHub.