用git拉取代码莫明其妙出现packet_write_wait: Connection to 35.231.145.151 port 22: Broken pipe错误
操作系统为manjaro 18.0 ，桌面为平铺窗口管理器 i3wm。

当时打算从gitlab上拉取一个爬虫项目。然后出现下面的错误提示

正克隆到 'jdspider'...
packet_write_wait: Connection to 35.231.145.151 port 22: Broken pipe
fatal: 无法读取远程仓库。

请确认您有正确的访问权限并且仓库存在

按照提示以为是publickey有问题。然后删除了know_hosts文件并且重新创建了几次publickey。问题依旧没有解决。

查看了gitlab的参考文档，发现可以用 -Tv 参数来debug连接过程

连接信息如下

OpenSSH_7.9p1, OpenSSL 1.1.1 11 Sep 2018
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 20: Applying options for *
debug1: Connecting to gitlab.com [35.231.145.151] port 22.
debug1: Connection established.
debug1: identity file /home/zijieya/.ssh/id_rsa type 0
debug1: identity file /home/zijieya/.ssh/id_rsa-cert type -1
debug1: identity file /home/zijieya/.ssh/id_dsa type -1
debug1: identity file /home/zijieya/.ssh/id_dsa-cert type -1
debug1: identity file /home/zijieya/.ssh/id_ecdsa type -1
debug1: identity file /home/zijieya/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/zijieya/.ssh/id_ed25519 type -1
debug1: identity file /home/zijieya/.ssh/id_ed25519-cert type -1
debug1: identity file /home/zijieya/.ssh/id_xmss type -1
debug1: identity file /home/zijieya/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.9
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.6
debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.6 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
debug1: Authenticating to gitlab.com:22 as 'git'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256@libssh.org
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:HbW3g8zUjNSksFbqTiUWPWg2Bq1x8xdGUrliXFzSnUw
debug1: Host 'gitlab.com' is known and matches the ECDSA host key.
debug1: Found key in /home/zijieya/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: Will attempt key: /home/zijieya/.ssh/id_rsa RSA SHA256:GjBMc3pVeAeE+ujeq7nrPjsD1ROTV45XTDCed07Nw2I
debug1: Will attempt key: /home/zijieya/.ssh/id_dsa
debug1: Will attempt key: /home/zijieya/.ssh/id_ecdsa
debug1: Will attempt key: /home/zijieya/.ssh/id_ed25519
debug1: Will attempt key: /home/zijieya/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /home/zijieya/.ssh/id_rsa RSA SHA256:GjBMc3pVeAeE+ujeq7nrPjsD1ROTV45XTDCed07Nw2I
debug1: Server accepts key: /home/zijieya/.ssh/id_rsa RSA SHA256:GjBMc3pVeAeE+ujeq7nrPjsD1ROTV45XTDCed07Nw2I
debug1: Authentication succeeded (publickey).
Authenticated to gitlab.com ([35.231.145.151]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug1: Remote: Forced command.
debug1: Remote: Port forwarding disabled.
debug1: Remote: X11 forwarding disabled.
debug1: Remote: Agent forwarding disabled.
debug1: Remote: PTY allocation disabled.
debug1: Remote: Forced command.
debug1: Remote: Port forwarding disabled.
debug1: Remote: X11 forwarding disabled.
debug1: Remote: Agent forwarding disabled.
debug1: Remote: PTY allocation disabled.
packet_write_wait: Connection to 35.231.145.151 port 22: Broken pipe

可以发现publickey验证成功了。应该是在用ssh传输数据时出错了。

百度了一下,大多数人都认为连接超时断开了。然而连接时间设为很长依旧会出现此问题。

应该在ssh的配置文件中增加

IPQoS lowdelay throughput