mina-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Roger Hart (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SSHD-711) Apache hangs sending file
Date Tue, 08 Nov 2016 00:28:58 GMT

     [ https://issues.apache.org/jira/browse/SSHD-711?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Roger Hart updated SSHD-711:
----------------------------
    Attachment: SSHDgood.log
                SSHDbad.log

> Apache hangs sending file
> -------------------------
>
>                 Key: SSHD-711
>                 URL: https://issues.apache.org/jira/browse/SSHD-711
>             Project: MINA SSHD
>          Issue Type: Bug
>    Affects Versions: 1.1.0
>            Reporter: Roger Hart
>            Priority: Minor
>         Attachments: SSHDbad.log, SSHDgood.log
>
>
> We're running 1.1.0 but I get the same problem with 1.2.0. When sending a file to a particular
server we have problems on some machines but not others. I've attached a DEBUG log for a "good"
machine and a "bad" machine.  For the "bad" machine, the system hangs midway through sending
the file. Here are the final log entries.
> My theory is that "normally" you see a "Writing X bytes" message, followed by a "Finished
writing" message, followed by a "Read Y bytes" message. But on the "bad" machine there seems
to be 2 "Write" messages before the hang. I think this is because there are 2 threads putting
a write request in the write queue and both are written out to the socket. I'm wondering if
this can cause the max packet size specified in the SSH_MSG_CHANNEL_OPEN_CONFIRMATION message
to be exceeded. The "good" machine has fewer threads than the "bad" machine, and we've also
observed that a smaller files is less likely to hit the problem.
> Do you think this theory is valid?
> Thanks,
> Roger
> 10:29:22.448 7-Nov-16 -0800 | (lient.channel.ChannelSubsystem) handleData(ChannelSubsystem[id=0,
recipient=0]-ClientSessionImpl[USER@/X.X.X.X:22][sftp]) SSH_MSG_CHANNEL_DATA len=19
> 10:29:22.450 7-Nov-16 -0800 | (che.sshd.common.channel.Window) waitForSpace(ChannelSubsystem[id=0,
recipient=0]-ClientSessionImpl[USER@/X.X.X.X:22][sftp]: client remote window) available: 1073741779
> 10:29:22.450 7-Nov-16 -0800 | (che.sshd.common.channel.Window) waitAndConsume(ChannelSubsystem[id=0,
recipient=0]-ClientSessionImpl[USER@/X.X.X.X:22][sftp]: client remote window) - requested=32768,
available=1073741779
> 10:29:22.463 7-Nov-16 -0800 | (shd.common.io.nio2.Nio2Session) Writing 32820 bytes
> 10:29:22.464 7-Nov-16 -0800 | (che.sshd.common.channel.Window) waitForSpace(ChannelSubsystem[id=0,
recipient=0]-ClientSessionImpl[USER@/X.X.X.X:22][sftp]: client remote window) available: 1073709011
> 10:29:22.464 7-Nov-16 -0800 | (che.sshd.common.channel.Window) waitAndConsume(ChannelSubsystem[id=0,
recipient=0]-ClientSessionImpl[USER@/X.X.X.X:22][sftp]: client remote window) - requested=31,
available=1073709011
> 10:29:22.464 7-Nov-16 -0800 | (shd.common.io.nio2.Nio2Session) Writing 84 bytes
> 10:29:22.534 7-Nov-16 -0800 | (shd.common.io.nio2.Nio2Session) Finished writing
> 10:29:22.534 7-Nov-16 -0800 | (shd.common.io.nio2.Nio2Session) Finished writing



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message