./kcptube kcpclient.conf

客户端报告错误 kcptube version 20230924 Error Found in Configuration File(s): No Servers: 0 Relays: 0 Clients: 1 start_up() running in client mode [2023-09-25 11:11:11 +0000] open: Too many open files

如果是kcptube-linux-musl-x64.tar.bz2版报告错误 open: No file descriptors available

系统open files数是缺省的，没有改变过 # ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 3491 max locked memory (kbytes, -l) 65536 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 3491 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited

下面是服务器的配置文件内容，服务器没有报错

mode=server kcp=fast1 inbound_bandwidth=500M outbound_bandwidth=500M listen_port=11000-11999 destination_port=6000 destination_address=127.0.0.1 dport_refresh=20 encryption_password=password encryption_algorithm=AES-GCM keep_alive=10 ipv4_only=1

下面是客户端的配置文件内容

mode=client kcp=fast1 inbound_bandwidth=450M outbound_bandwidth=50M listen_port=6000 destination_port=11000-11999 destination_address=www.mydomain.com dport_refresh=20 encryption_password=password encryption_algorithm=AES-GCM keep_alive=10 ipv4_only=1 mux_tunnels=65535

上面的mux_tunnels=1020也一样的报错

请教一下应该怎样修改参数才能运行

谢谢！

cnbatch commented 12 months ago

这是因为不少 Linux 发行版的 Open Files 数量限制为 1024，所以很容易会遇到这种问题。

临时解决办法：

运行命令 ulimit -n，查看输出的数值。这个数值几乎都是 1024。
如果数值确实只有 1024，请运行命令 ulimit -n 300000

永久解决办法：编辑 /etc/security/limits.conf，在末尾加上

*         hard    nofile       300000
*         soft    nofile       300000
root      hard    nofile       300000
root      soft    nofile       300000

egg1234 commented 12 months ago

更改了客户端ubutnu 20系统的Open Files数值 ulimit -n 300000

服务器监听端口范围改小到 listen_port=11000-11100

客户端 destination_port=11000-11100 mux_tunnels=500

两边启动后客户端不断报下面的错误，但开始即使报错好像可以使用一次转发，之后就不能转发了

[2023-10-03 10:30:58 +0000] KCP conv is not the same as record : conv = 3413772101, local kcp : 1066320723 [2023-10-03 10:30:58 +0000] KCP conv is not the same as record : conv = 0, local kcp : 2965190177 [2023-10-03 10:30:59 +0000] KCP conv is not the same as record : conv = 0, local kcp : 2965190177 [2023-10-03 10:31:00 +0000] KCP conv is not the same as record : conv = 0, local kcp : 2965190177 [2023-10-03 10:32:02 +0000] KCP conv is not the same as record : conv = 3469647057, local kcp : 3459109078 [2023-10-03 10:32:03 +0000] KCP conv is not the same as record : conv = 2175946252, local kcp : 3930183083 [2023-10-03 10:32:04 +0000] KCP conv is not the same as record : conv = 1802855575, local kcp : 359129512 [2023-10-03 10:32:04 +0000] KCP conv is not the same as record : conv = 3469647057, local kcp : 3459109078 [2023-10-03 10:32:06 +0000] KCP conv is not the same as record : conv = 2175946252, local kcp : 3930183083 [2023-10-03 10:32:09 +0000] KCP conv is not the same as record : conv = 2175946252, local kcp : 3930183083 [2023-10-03 10:32:10 +0000] KCP conv is not the same as record : conv = 1802855575, local kcp : 359129512 [2023-10-03 10:32:10 +0000] KCP conv is not the same as record : conv = 3469647057, local kcp : 3459109078 [2023-10-03 10:32:14 +0000] KCP conv is not the same as record : conv = 0, local kcp : 3579815534 Insufficient input for GCM decryption, tag missing Invalid authentication tag: GCM tag check failed Invalid authentication tag: GCM tag check failed [2023-10-03 10:32:58 +0000] KCP conv is not the same as record : conv = 0, local kcp : 1149376605 Invalid authentication tag: GCM tag check failed Invalid authentication tag: GCM tag check failed Invalid authentication tag: GCM tag check failed Invalid authentication tag: GCM tag check failed

然后服务器端启动一个socks5代理 ./gost -L=:6000

客户端测试使用，第一次可以连通并正常返回内容，第二次没有反应，并且服务器端的gost没有看到有客户端的连接申请，这时客户端的kcptube继续不断报上面的错误信息 curl -x http://127.0.0.1:6000 https://clients3.google.com

这两台ubuntu机器，同样的线路，使用hysteria端口跳跃并做端口转发gost代理没有任何问题，使用juicity做端口转发gost代理也没有任何问题

cnbatch commented 12 months ago

mux_tunnels=500 这个设置有点多，先降到5~10试试，大多数情况下是够用的

egg1234 commented 12 months ago

客户端设置mux_tunnels=5，之后客户端就没有报错出现，晚高峰测试上面的代理方式，长时间播放8k及4k视频非常稳定

而且最后发现如果设置mux_tunnels=5，即使是系统缺省的open files (-n) 1024也不会报错

另外建议是说明里面应该提醒一下使用linux正式发行版的用户，应该把mux_tunnels及系统open files的因素关联考虑，大概多少mux_tunnels对应多少open files数的一个比例，而且也说明一下mux_tunnels设置很大数值时的应用场合，以免像我这种小白胡乱就配上去了

最后是非常感谢大佬写出如此优秀的项目！

cnbatch / kcptube

客户端报告错误“open: Too many open files” #8

./kcptube kcpclient.conf