自 2020 年 11 月左右以来，我们在所有 Google 源代码库上都遇到了 Git 操作（拉/推等）挂起的情况。它通常会发生 10 次中的 1-2 次。
我们在位于不同国家/地区的 2 个不同办公室的不同计算机（具有完全不同的配置环境的 Ubuntu 和 Fedora 操作系统）上遇到了这种情况（它们都具有未经过滤、质量良好、定期的互联网访问，而且我们不使用 VPN，所以可以排除网络问题）。更改 IPv6/IPv4 连接似乎不会影响这一点。
我们存储库的获取和推送 URL 如下所示：
ssh://email@source.developers.google.com:2022/p/xxx/r/yyy
（我们已将电子邮件、项目名称替换为 xxx 并将仓库名称替换为 yyy）
我们尝试了以下方法：
- 将 http.postBuffer 设置为 524288000 和 5000 但这不会影响问题（我们知道使用了 SSH，但我们试了一下）。
- 再次运行
gcloud auth login以刷新凭据
这是一个 git pull log 摘录，它挂了几分钟，但最终成功完成：
febr 10 09:51:41 debug2: channel 0: request env confirm 0
febr 10 09:51:41 debug3: send packet: type 98
febr 10 09:51:41 debug3: Ignored env OSP_KSDK_PATH
febr 10 09:51:41 debug3: Ignored env QT_PLATFORM_PLUGIN
febr 10 09:51:41 debug3: Ignored env VTE_VERSION
febr 10 09:51:41 debug1: Sending command: git-upload-pack '/p/xxx/r/yyy'
febr 10 09:51:41 debug2: channel 0: request exec confirm 1
febr 10 09:51:41 debug3: send packet: type 98
febr 10 09:51:41 debug2: channel_input_open_confirmation: channel 0: callback done
febr 10 09:51:41 debug2: channel 0: open confirm rwindow 2097152 rmax 32768
febr 10 09:51:41 debug3: receive packet: type 99
febr 10 09:51:41 debug2: channel_input_status_confirm: type 99 id 0
febr 10 09:51:41 debug2: exec request accepted on channel 0
febr 10 09:55:08 debug2: channel 0: read<=0 rfd 4 len 0
febr 10 09:55:08 debug2: channel 0: read failed
febr 10 09:55:08 debug2: channel 0: chan_shutdown_read (i0 o0 sock -1 wfd 4 efd 6 [write])
febr 10 09:55:08 debug2: channel 0: input open -> drain
febr 10 09:55:08 debug2: channel 0: ibuf empty
febr 10 09:55:08 debug2: channel 0: send eof
febr 10 09:55:08 debug3: send packet: type 96
febr 10 09:55:08 debug2: channel 0: input drain -> closed
febr 10 09:55:08 debug2: channel 0: rcvd adjust 4
febr 10 10:05:08 debug3: receive packet: type 98
febr 10 10:05:08 debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
febr 10 10:05:08 debug2: channel 0: rcvd ext data 39
febr 10 10:05:08 CANCELLED The operation was cancelled.
febr 10 10:05:08 debug2: channel 0: written 39 to efd 6
febr 10 10:05:08 debug2: channel 0: rcvd ext data 112
febr 10 10:05:08 debug2: channel 0: rcvd ext data 99
febr 10 10:05:08 debug3: receive packet: type 97
febr 10 10:05:08 debug2: channel 0: rcvd close
febr 10 10:05:08 debug2: channel 0: output open -> drain
febr 10 10:05:08 debug3: channel 0: will not send data after close
febr 10 10:05:08 debug2: channel 0: obuf_empty delayed efd 6/(211)
febr 10 10:05:08 [type.googleapis.com/devtools.gerritcodereview.proto.GerritCodeReviewError]: {
febr 10 10:05:08 error_type: CLIENT_TIMED_OUT
febr 10 10:05:08 }
febr 10 10:05:08 [type.googleapis.com/google.rpc.RequestInfo]: {
febr 10 10:05:08 request_id: "d4c27f7f36644520a0da17841c907b00"
febr 10 10:05:08 }
febr 10 10:05:08 debug2: channel 0: written 211 to efd 6
febr 10 10:05:08 debug3: channel 0: will not send data after close
febr 10 10:05:08 debug2: channel 0: obuf empty
febr 10 10:05:08 debug2: channel 0: chan_shutdown_write (i3 o1 sock -1 wfd 5 efd 6 [write])
febr 10 10:05:08 debug2: channel 0: output drain -> closed
febr 10 10:05:08 debug2: channel 0: almost dead
febr 10 10:05:08 debug2: channel 0: gc: notify user
febr 10 10:05:08 debug2: channel 0: gc: user detached
febr 10 10:05:08 debug2: channel 0: send close
febr 10 10:05:08 debug3: send packet: type 97
febr 10 10:05:08 debug2: channel 0: is dead
febr 10 10:05:08 debug2: channel 0: garbage collecting
febr 10 10:05:08 debug1: channel 0: free: client-session, nchannels 1
febr 10 10:05:08 debug3: channel 0: status: The following connections are open:
febr 10 10:05:08 #0 client-session (t4 r0 i3/0 o3/0 e[write]/0 fd -1/-1/6 sock -1 cc -1)
febr 10 10:05:08
febr 10 10:05:08 debug3: send packet: type 1
febr 10 10:05:08 debug1: fd 0 clearing O_NONBLOCK
febr 10 10:05:08 debug3: fd 1 is not O_NONBLOCK
febr 10 10:05:08 Transferred: sent 3816, received 2100 bytes, in 807.1 seconds
febr 10 10:05:08 Bytes per second: sent 4.7, received 2.6
febr 10 10:05:08 debug1: Exit status 1
febr 10 10:05:08 Already up to date.
这是一个摘录，它挂了几分钟并因身份验证错误而失败（有时会发生这种情况，有时会像以前的日志一样完成）：
febr 10 09:39:34 debug1: Sending env LC_PAPER = hu_HU.UTF-8
febr 10 09:39:34 debug2: channel 0: request env confirm 0
febr 10 09:39:34 debug3: send packet: type 98
febr 10 09:39:34 debug3: Ignored env OSP_KSDK_PATH
febr 10 09:39:34 debug3: Ignored env QT_PLATFORM_PLUGIN
febr 10 09:39:34 debug3: Ignored env VTE_VERSION
febr 10 09:39:34 debug1: Sending command: git-upload-pack '/p/xxx/r/yyy'
febr 10 09:39:34 debug2: channel 0: request exec confirm 1
febr 10 09:39:34 debug3: send packet: type 98
febr 10 09:39:34 debug2: channel_input_open_confirmation: channel 0: callback done
febr 10 09:39:34 debug2: channel 0: open confirm rwindow 2097152 rmax 32768
febr 10 09:39:34 debug3: receive packet: type 99
febr 10 09:39:34 debug2: channel_input_status_confirm: type 99 id 0
febr 10 09:39:34 debug2: exec request accepted on channel 0
febr 10 09:45:07 debug3: receive packet: type 98
febr 10 09:45:07 debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
febr 10 09:45:07 debug2: channel 0: rcvd ext data 232
febr 10 09:45:07 debug2: channel 0: rcvd ext data 125
febr 10 09:45:07 UNAUTHENTICATED Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other
valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.
febr 10 09:45:07 [type.googleapis.com/devtools.gerritcodereview.proto.GerritCodeReviewError]: {
febr 10 09:45:07 error_type: CREDENTIAL_LIFETIME_TOO_SHORT
febr 10 09:45:07 }
febr 10 09:45:07 debug2: channel 0: written 357 to efd 6
febr 10 09:45:07 debug2: channel 0: rcvd ext data 99
febr 10 09:45:07 debug3: receive packet: type 97
febr 10 09:45:07 debug2: channel 0: rcvd close
febr 10 09:45:07 debug2: channel 0: output open -> drain
febr 10 09:45:07 debug2: channel 0: chan_shutdown_read (i0 o1 sock -1 wfd 4 efd 6 [write])
febr 10 09:45:07 debug2: channel 0: input open -> closed
febr 10 09:45:07 debug3: channel 0: will not send data after close
febr 10 09:45:07 debug2: channel 0: obuf_empty delayed efd 6/(99)
febr 10 09:45:07 [type.googleapis.com/google.rpc.RequestInfo]: {
febr 10 09:45:07 request_id: "5e3ea7c0a78442ff9a1aca05f8d36c5e"
febr 10 09:45:07 }
febr 10 09:45:07 debug2: channel 0: written 99 to efd 6
febr 10 09:45:07 debug3: channel 0: will not send data after close
febr 10 09:45:07 debug2: channel 0: obuf empty
febr 10 09:45:07 debug2: channel 0: chan_shutdown_write (i3 o1 sock -1 wfd 5 efd 6 [write])
febr 10 09:45:07 debug2: channel 0: output drain -> closed
febr 10 09:45:07 debug2: channel 0: almost dead
febr 10 09:45:07 debug2: channel 0: gc: notify user
febr 10 09:45:07 debug2: channel 0: gc: user detached
febr 10 09:45:07 debug2: channel 0: send close
febr 10 09:45:07 debug3: send packet: type 97
febr 10 09:45:07 debug2: channel 0: is dead
febr 10 09:45:07 debug2: channel 0: garbage collecting
febr 10 09:45:07 debug1: channel 0: free: client-session, nchannels 1
febr 10 09:45:07 debug3: channel 0: status: The following connections are open:
febr 10 09:45:07 #0 client-session (t4 r0 i3/0 o3/0 e[write]/0 fd -1/-1/6 sock -1 cc -1)
febr 10 09:45:07
febr 10 09:45:07 debug3: send packet: type 1
febr 10 09:45:07 debug1: fd 0 clearing O_NONBLOCK
febr 10 09:45:07 debug3: fd 1 is not O_NONBLOCK
febr 10 09:45:07 Transferred: sent 3768, received 1924 bytes, in 333.8 seconds
febr 10 09:45:07 Bytes per second: sent 11.3, received 5.8
febr 10 09:45:07 debug1: Exit status 16
febr 10 09:45:07 fatal: Could not read from remote repository.
febr 10 09:45:07
febr 10 09:45:07 Please make sure you have the correct access rights
febr 10 09:45:07 and the repository exists.
有谁知道我们应该尝试消除这种偶尔挂起的情况吗？