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Goldstein Lyor commented on SSHD-942: ------------------------------------- {quote} Shouldn't there be a companion default listener that can be used, to detect client protocol misbehavior problems , that you mentioned in your last comment? {quote} Yes, there should, but I am not 100% sure what it's recommended behavior should be, and more important how to test it. > 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 > Assignee: Goldstein Lyor > 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] -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@mina.apache.org For additional commands, e-mail: dev-h...@mina.apache.org