[GH-ISSUE #2588] P2P MODE READ UDP I/O TIMEOUT FREQUENTLY HAPPENS and YAMUX CONNECTION ERROR

gitea-mirror commented

2026-05-05 13:19:44 -06:00

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Originally created by @kxdkxd on GitHub (Sep 25, 2021).
Original GitHub issue: https://github.com/fatedier/frp/issues/2588

Originally assigned to: @fatedier on GitHub.

Bug Description

Hi, I am using frp for NAT Penetration, and I have already succeed in a short moment that I can browser a webpage or setup a SSH connection through this xtcp, the frp can shows "nat hole connection make success". (Means the NAT devices in my network is able to be penertrated.)
However, this normal time did not last long, while I was downloading a quite big file throuh IIS, at first, it begun download at around speed 550kB/s *(though the normal uploading speed in my IIS server is ~3MB/s and download speed is ~30MB/s in my IIS client.) *
But a short time later a WARNING appeared in the console, the connection broke and could not be re-established whatever I tried:
get sid from visitor error: read udp 10.63.xxx.xxx:49569: i/o timeout.
and the similar one appeared in the visitor's console:
get sid from client error: read udp 192.168.0.8:62182->114.xxx.xxx.131:12145: i/o timeout
Moreover, I cannot make a parallel download with IDMan, with the following ERROR message:
accept for yamux connection error: keepalive timeout

Could you plz help me with this problem, thanks a loooot!

frpc Version

0.37.0

frps Version

0.37.0

System Architecture

windows/amd64

Configurations

[p2p_mewebdav_tcp]
type = xtcp
sk = sksksk
local_ip = 127.0.0.1
local_port = 80

[p2p_mewebdav_visitor]
type = xtcp
role = visitor
server_name = p2p_mewebdav_tcp
sk = sksksk
bind_addr = 0.0.0.0
bind_port = 8909

Logs

accept for yamux connection error: keepalive timeout
get sid from client error: read udp 192.168.0.8:62182->114.xxx.xxx.131:12145: i/o timeout
get sid from visitor error: read udp 10.63.xxx.xxx:49569: i/o timeout.

Steps to reproduce

make a xtcp connection in WAN

Affected area

Docs
Installation
Performance and Scalability
Security
User Experience
Test and Release
Developer Infrastructure
Client Plugin
Server Plugin
Extensions
Others

Originally created by @kxdkxd on GitHub (Sep 25, 2021). Original GitHub issue: https://github.com/fatedier/frp/issues/2588 Originally assigned to: @fatedier on GitHub. ### Bug Description Hi, I am using frp for NAT Penetration, and I have already succeed in a short moment that I can browser a webpage or setup a SSH connection through this xtcp, the frp can shows "nat hole connection make success". *(Means the NAT devices in my network is able to be penertrated.)* However, this normal time did not last long, while I was downloading a quite big file throuh IIS, at first, it begun download at around speed 550kB/s *(though the normal uploading speed in my IIS server is ~3MB/s and download speed is ~30MB/s in my IIS client.) * But a short time later a WARNING appeared in the console, the connection broke and could not be re-established whatever I tried: **get sid from visitor error: read udp 10.63.xxx.xxx:49569: i/o timeout.** and the similar one appeared in the visitor's console: **get sid from client error: read udp 192.168.0.8:62182->114.xxx.xxx.131:12145: i/o timeout** Moreover, I cannot make a parallel download with IDMan, with the following ERROR message: **accept for yamux connection error: keepalive timeout** Could you plz help me with this problem, thanks a loooot! ### frpc Version 0.37.0 ### frps Version 0.37.0 ### System Architecture windows/amd64 ### Configurations [p2p_mewebdav_tcp] type = xtcp sk = sksksk local_ip = 127.0.0.1 local_port = 80 [p2p_mewebdav_visitor] type = xtcp role = visitor server_name = p2p_mewebdav_tcp sk = sksksk bind_addr = 0.0.0.0 bind_port = 8909 ### Logs **accept for yamux connection error: keepalive timeout** **get sid from client error: read udp 192.168.0.8:62182->114.xxx.xxx.131:12145: i/o timeout** **get sid from visitor error: read udp 10.63.xxx.xxx:49569: i/o timeout.** ### Steps to reproduce make a xtcp connection in WAN ### Affected area - [ ] Docs - [ ] Installation - [X] Performance and Scalability - [ ] Security - [ ] User Experience - [ ] Test and Release - [ ] Developer Infrastructure - [ ] Client Plugin - [ ] Server Plugin - [ ] Extensions - [ ] Others

gitea-mirror closed this issue

2026-05-05 13:19:45 -06:00

gitea-mirror commented

2026-05-05 13:19:47 -06:00

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@fatedier commented on GitHub (Sep 26, 2021):

Maybe caused by yamux. This issue needs more time to debug.

@fatedier commented on GitHub (Sep 26, 2021): Maybe caused by yamux. This issue needs more time to debug.

gitea-mirror commented

2026-05-05 13:19:47 -06:00

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@wdpd commented on GitHub (Sep 28, 2021):

I have similar problem. Everthing is same except that only the vistor shows the sid error, and client shows keepalive timeout instead.

@wdpd commented on GitHub (Sep 28, 2021): I have similar problem. Everthing is same except that only the vistor shows the sid error, and client shows keepalive timeout instead.

gitea-mirror commented

2026-05-05 13:19:48 -06:00

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@fatedier commented on GitHub (Jun 26, 2023):

xtcp has been refactored and now defaults to using the quic protocol. This issue is now closed.

@fatedier commented on GitHub (Jun 26, 2023): xtcp has been refactored and now defaults to using the quic protocol. This issue is now closed.

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