[
https://issues.apache.org/jira/browse/SSHD-942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
David Ostrovsky updated SSHD-942:
---------------------------------
Description:
Gerrit users report problem: [1] with {{git clone/fetch/pull}} operations on
high latency network, after upgrading Gerrit to 2.16.x from 2.15.x that
effectively means upgrade of SSHD from 1.6.0 to 1.7.0 and to 2.0.0.
The error on SSHD 2.0.0 (Gerrit 2.16) is:
{noformat}
[2019-09-16 10:27:14,256] [sshd-SshServer[24facb47]-nio2-thread-8] WARN
org.apache.sshd.server.session.ServerSessionImpl :
exceptionCaught(ServerSessionImpl[usexxx@/172.x.x.1:63306])[state=Opened]
SshChannelNotFoundException: Received SSH_MSG_CHANNEL_WINDOW_ADJUST on unknown
channel 0
{noformat}
Note that the attempt to upgrade SSHD in Gerrit to 2.3.0 in this CL: [2],
didn't fix the problem:
{noformat}
[2019-09-17 14:05:27,923] [sshd-SshDaemon[189c6683](port=22)-nio2-thread-4]
WARN org.apache.sshd.server.session.ServerSessionImpl :
exceptionCaught(ServerSessionImpl[<username>@/<ip>:55212])[state=Opened]
SshChannelNotFoundException: Received SSH_MSG_CHANNEL_WINDOW_ADJUST on unknown
channel 3
[2019-09-17 14:05:27,924] [SSH git-upload-pack <repo> (<username>)] ERROR
com.google.gerrit.sshd.BaseCommand : Internal server error (user <username>
account 1000190) during git-upload-pack '<repo path>'
org.apache.sshd.common.channel.WindowClosedException: Already closed:
Window[server/remote](ChannelSession[id=2,
recipient=6]-ServerSessionImpl[<username>@/<ip>:55212])
at org.apache.sshd.common.channel.Window.waitForCondition(Window.java:302)
at org.apache.sshd.common.channel.Window.waitForSpace(Window.java:252)
{noformat}
Also note, that downgrade to 1.7.0: [3] didn't fix the problem either. Only
after downgrade to SSH 1.6.0: [4] the problem disappeared, and only warnings
left in the log:
{noformat}
[2019-09-18 09:24:52,755] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 12
[2019-09-18 09:24:52,756] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 13
[2019-09-18 09:25:02,576] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 15
[2019-09-18 09:25:36,508] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 18
[2019-09-18 09:25:57,527] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 19
[2019-09-18 09:30:16,488] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 21
{noformat}
[1]
[https://bugs.chromium.org/p/gerrit/issues/detail?id=11491|https://bugs.chromium.org/p/gerrit/issues/detail?id=11491&;]
[2] [https://gerrit-review.googlesource.com/c/gerrit/+/207752]
[3] [https://gerrit-review.googlesource.com/c/gerrit/+/237730]
[4] [https://gerrit-review.googlesource.com/c/gerrit/+/237731]
was:
Gerrit users report problem: [1] with {{git clone/fetch/pull}} operations on
high latency network, after upgrading Gerrit to 2.16.x from 2.15.x that
effectively means upgrade of SSHD from 1.6.0 to 1.7.0 and to 2.0.0.
The error on SSHD 2.0.0 (Gerrit 2.16) is:
{noformat}
[2019-09-16 10:27:14,256] [sshd-SshServer[24facb47]-nio2-thread-8] WARN
org.apache.sshd.server.session.ServerSessionImpl :
exceptionCaught(ServerSessionImpl[usexxx@/172.x.x.1:63306])[state=Opened]
SshChannelNotFoundException: Received SSH_MSG_CHANNEL_WINDOW_ADJUST on unknown
channel 0
{noformat}
Note that the attempt to upgrade SSHD in Gerrit to 2.3.0 in this CL: [2],
didn't fix the problem:
{noformat}
[2019-09-17 14:05:27,923] [sshd-SshDaemon[189c6683](port=22)-nio2-thread-4]
WARN org.apache.sshd.server.session.ServerSessionImpl :
exceptionCaught(ServerSessionImpl[<username>@/<ip>:55212])[state=Opened]
SshChannelNotFoundException: Received SSH_MSG_CHANNEL_WINDOW_ADJUST on unknown
channel 3
[2019-09-17 14:05:27,924] [SSH git-upload-pack <repo> (<username>)] ERROR
com.google.gerrit.sshd.BaseCommand : Internal server error (user <username>
account 1000190) during git-upload-pack '<repo path>'
org.apache.sshd.common.channel.WindowClosedException: Already closed:
Window[server/remote](ChannelSession[id=2,
recipient=6]-ServerSessionImpl[<username>@/<ip>:55212])
at org.apache.sshd.common.channel.Window.waitForCondition(Window.java:302)
at org.apache.sshd.common.channel.Window.waitForSpace(Window.java:252)
{noformat}
Also note, that downgrade to 1.7.0: [3] didn't fix the problem either. Only
after downgrade to SSH 1.6.0: [4] the problem disappeared, and only warnings
left in the log:
{noformat}
[2019-09-18 09:24:52,755] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 12
[2019-09-18 09:24:52,756] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 13
[2019-09-18 09:25:02,576] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 15
[2019-09-18 09:25:36,508] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 18
[2019-09-18 09:25:57,527] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 19
[2019-09-18 09:30:16,488] [NioProcessor-2] WARN
org.apache.sshd.server.session.ServerConnectionService : Received
SSH_MSG_CHANNEL_CLOSE on unknown channel 21
{noformat}
[1]
[https://bugs.chromium.org/p/gerrit/issues/detail?id=11491|https://bugs.chromium.org/p/gerrit/issues/detail?id=11491&;]
[2] [https://gerrit-review.googlesource.com/c/gerrit/+/207752]
[3] [https://gerrit-review.googlesource.com/c/gerrit/+/237730]
[4] https://gerrit-review.googlesource.com/c/gerrit/+/237731
> SSH session crashes on high latency network
> -------------------------------------------
>
> Key: SSHD-942
> URL: https://issues.apache.org/jira/browse/SSHD-942
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 1.7.0, 2.0.0, 2.3.0
> Reporter: David Ostrovsky
> Priority: Major
>
> Gerrit users report problem: [1] with {{git clone/fetch/pull}} operations on
> high latency network, after upgrading Gerrit to 2.16.x from 2.15.x that
> effectively means upgrade of SSHD from 1.6.0 to 1.7.0 and to 2.0.0.
> The error on SSHD 2.0.0 (Gerrit 2.16) is:
> {noformat}
> [2019-09-16 10:27:14,256] [sshd-SshServer[24facb47]-nio2-thread-8] WARN
> org.apache.sshd.server.session.ServerSessionImpl :
> exceptionCaught(ServerSessionImpl[usexxx@/172.x.x.1:63306])[state=Opened]
> SshChannelNotFoundException: Received SSH_MSG_CHANNEL_WINDOW_ADJUST on
> unknown channel 0
> {noformat}
> Note that the attempt to upgrade SSHD in Gerrit to 2.3.0 in this CL: [2],
> didn't fix the problem:
> {noformat}
> [2019-09-17 14:05:27,923] [sshd-SshDaemon[189c6683](port=22)-nio2-thread-4]
> WARN org.apache.sshd.server.session.ServerSessionImpl :
> exceptionCaught(ServerSessionImpl[<username>@/<ip>:55212])[state=Opened]
> SshChannelNotFoundException: Received SSH_MSG_CHANNEL_WINDOW_ADJUST on
> unknown channel 3
> [2019-09-17 14:05:27,924] [SSH git-upload-pack <repo> (<username>)] ERROR
> com.google.gerrit.sshd.BaseCommand : Internal server error (user <username>
> account 1000190) during git-upload-pack '<repo path>'
> org.apache.sshd.common.channel.WindowClosedException: Already closed:
> Window[server/remote](ChannelSession[id=2,
> recipient=6]-ServerSessionImpl[<username>@/<ip>:55212])
> at org.apache.sshd.common.channel.Window.waitForCondition(Window.java:302)
> at org.apache.sshd.common.channel.Window.waitForSpace(Window.java:252)
> {noformat}
> Also note, that downgrade to 1.7.0: [3] didn't fix the problem either. Only
> after downgrade to SSH 1.6.0: [4] the problem disappeared, and only warnings
> left in the log:
> {noformat}
> [2019-09-18 09:24:52,755] [NioProcessor-2] WARN
> org.apache.sshd.server.session.ServerConnectionService : Received
> SSH_MSG_CHANNEL_CLOSE on unknown channel 12
> [2019-09-18 09:24:52,756] [NioProcessor-2] WARN
> org.apache.sshd.server.session.ServerConnectionService : Received
> SSH_MSG_CHANNEL_CLOSE on unknown channel 13
> [2019-09-18 09:25:02,576] [NioProcessor-2] WARN
> org.apache.sshd.server.session.ServerConnectionService : Received
> SSH_MSG_CHANNEL_CLOSE on unknown channel 15
> [2019-09-18 09:25:36,508] [NioProcessor-2] WARN
> org.apache.sshd.server.session.ServerConnectionService : Received
> SSH_MSG_CHANNEL_CLOSE on unknown channel 18
> [2019-09-18 09:25:57,527] [NioProcessor-2] WARN
> org.apache.sshd.server.session.ServerConnectionService : Received
> SSH_MSG_CHANNEL_CLOSE on unknown channel 19
> [2019-09-18 09:30:16,488] [NioProcessor-2] WARN
> org.apache.sshd.server.session.ServerConnectionService : Received
> SSH_MSG_CHANNEL_CLOSE on unknown channel 21
> {noformat}
> [1]
> [https://bugs.chromium.org/p/gerrit/issues/detail?id=11491|https://bugs.chromium.org/p/gerrit/issues/detail?id=11491&;]
> [2] [https://gerrit-review.googlesource.com/c/gerrit/+/207752]
> [3] [https://gerrit-review.googlesource.com/c/gerrit/+/237730]
> [4] [https://gerrit-review.googlesource.com/c/gerrit/+/237731]
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