服务端日志大量报错failed to drain connection DrainSize

[timnick-snow]

除非特殊情况，请完整填写所有问题。不按模板发的 issue 将直接被关闭。
如果你遇到的问题不是 V2Ray 的 bug，比如你不清楚要如何配置，请使用Discussion进行讨论。

1. 你正在使用哪个版本的 V2Ray？（如果服务器和客户端使用了不同版本，请注明）
   V2Ray 4.33.0 (V2Fly, a community-driven edition of V2Ray.) Custom (go1.15.5 linux/amd64)
   A unified platform for anti-censorship.

2. 你的使用场景是什么？比如使用 Chrome 通过 Socks/VMess 代理观看 YouTube 视频。
   vmess代理访问部分外网

3. 你看到的不正常的现象是什么？（请描述具体现象，比如访问超时，TLS 证书错误等）

客户端正确配置后是可以正常访问需要访问的外网的, 但是不知道什么原因, 服务端日志有大量报错日志,
rejected v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 20 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found

并且来源ip很奇怪

4. 你期待看到的正确表现是怎样的？

这种报错是正常的吗? 什么原因导致的?

5. 请附上你的配置（提交 Issue 前请隐藏服务器端IP地址）。

服务器端配置:

{
  "log": {
    "access": "/var/log/v2ray/access.log",
    "error": "/var/log/v2ray/error.log",
    "loglevel": "error"
  },
  "inbounds": [
    {
      "tag": "default",
      "port": port,
      "protocol": "vmess",
      "settings": {
        "clients": [
          {
            "id": "uuid",
            "alterId": 2
          }
        ]
      }
    }
  ],
  "outbounds": [
    {
      "protocol": "blackhole",
      "settings": {
        "response": {
          "type": "none"
        }
      }
    },
    {
      "tag": "direct",
      "protocol": "freedom"
    }
  ],
  "routing": {
    "domainStrategy": "IPIfNonMatch",
    "rules": [
      {
        "type": "field",
        "domain": [
          "xxx.xxx"
        ],
        "inboundTag": [
          "default"
        ],
        "outboundTag": "direct"
      }
    ]
  }
}

6. 请附上出错时软件输出的错误日志。在 Linux 中，日志通常在 /var/log/v2ray/error.log 文件中。

服务器端错误日志:

     2020/12/03 14:09:29 113.128.104.24:35626 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 10 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:09:39 222.79.48.11:55444 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 13 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:09:50 222.79.48.11:58494 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 1 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:10:01 119.39.46.100:38458 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 5 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:39:07 175.152.31.31:51712 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 16 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:39:22 119.118.5.179:60178 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 18 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:55:43 222.79.48.61:54670 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 19 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:56:42 60.208.208.155:43530 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 13 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:56:57 60.208.208.155:46354 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 8 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:57:28 182.138.158.52:53762 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 9 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:57:38 182.138.158.52:55930 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 17 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 14:57:48 61.181.2.241:42220 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 14 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 15:23:49 27.211.187.191:57244 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 2 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 15:24:06 27.211.187.191:60118 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 2 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 15:31:28 110.177.183.79:40076 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 0 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 15:37:19 121.57.229.74:49732 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 2 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 15:43:22 124.235.138.127:55048 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 11 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 15:58:57 220.200.174.188:43456 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 0 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 15:59:07 220.200.174.188:47510 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 5 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 16:02:34 220.200.165.44:57650 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 10 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 16:18:14 27.224.137.217:43920 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 14 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 16:18:25 27.224.137.217:47322 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 4 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 16:18:37 27.224.137.217:50832 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 7 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 16:46:12 221.13.12.108:55358 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 20 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 16:46:22 221.13.12.108:59058 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 6 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 16:46:31 221.213.75.95:38942 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 17 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 16:46:32 221.13.12.108:34658 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 19 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 17:20:44 112.115.193.194:60500 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 14 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 17:26:01 113.128.104.155:57594 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 20 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found
2020/12/03 17:26:11 113.128.104.155:33157 rejected  v2ray.com/core/proxy/vmess/encoding: failed to drain connection DrainSize = 3253 21 20 > v2ray.com/core/proxy/vmess/encoding: invalid user > v2ray.com/core/proxy/vmess: Not Found

[kslr]

看起来是uuid错了

[timnick-snow]

@kslr 访问的ip是未经授权的ip, 怎么禁止这些ip访问呀, 一直访问一直报错.

[kslr]

设置防火墙

[darhwa]

全是三大运营商的空闲IP，明显是在被探测嘛。

先把alterId改成0。非0值早就证明不安全了（v2ray/v2ray-core#2523）,为0的情况是后面加的AEAD模式，相对更安全。

[1265578519]

4.28版本或以上 启动AEAD加密即可 服务端和客户端的alterId改成0

[timnick-snow]

改用vless了，tls+回落，挺好使的

[weaming]

使用 macOS 上的 Clash Pro 出现这种现象，重启客户端电脑后恢复正常。不知道原因。 :(

[xiebruce]

虽然这个问题已经关闭，不过我还是想说一下我遇到的情况：那就是因为录制视频的关系，我把系统时间改了，结果就出现跟楼主一模一样的问题，然后我才想起来客户端和服务器时间差不能超过貌似是90秒吧？我把时间改回正常时间，就好了，跟alterID无关

[weaming]

虽然这个问题已经关闭，不过我还是想说一下我遇到的情况：那就是因为录制视频的关系，我把系统时间改了，结果就出现跟楼主一模一样的问题，然后我才想起来客户端和服务器时间差不能超过貌似是90秒吧？我把时间改回正常时间，就好了，跟alterID无关

同样原因，非常感谢。

[yogkang]

我重新部署的时候也出现这个问题，后来发现更换UUID就好了，这是为什么呀！

[MackXue]

虽然这个问题已经关闭，不过我还是想说一下我遇到的情况：那就是因为录制视频的关系，我把系统时间改了，结果就出现跟楼主一模一样的问题，然后我才想起来客户端和服务器时间差不能超过貌似是90秒吧？我把时间改回正常时间，就好了，跟alterID无关

遇到同样的问题，很不起眼的问题，但是又很难排查．非常感谢你能把问题爆露出来

[zy-zzf2000]

同样的问题，感谢！

[daneilooh]

牛逼，同样的问题，同步一下时间就好了