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Posted to dev@mina.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/04/22 10:18:00 UTC
[jira] [Work logged] (SSHD-911) Deadlock in Apache SshClient used
for local port forwarding
[ https://issues.apache.org/jira/browse/SSHD-911?focusedWorklogId=230646&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-230646 ]
ASF GitHub Bot logged work on SSHD-911:
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Author: ASF GitHub Bot
Created on: 22/Apr/19 10:17
Start Date: 22/Apr/19 10:17
Worklog Time Spent: 10m
Work Description: lgoldstein commented on pull request #101: [SSHD-911] Check if client session/channel is open before writing a message through ClientChannelPendingMessagesQueue
URL: https://github.com/apache/mina-sshd/pull/101
Doesn't really explain the deadlock, but should mitigate it under the circumstances described in the issue
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Issue Time Tracking
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Worklog Id: (was: 230646)
Time Spent: 10m
Remaining Estimate: 0h
> Deadlock in Apache SshClient used for local port forwarding
> -----------------------------------------------------------
>
> Key: SSHD-911
> URL: https://issues.apache.org/jira/browse/SSHD-911
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 2.2.0
> Reporter: Roberto Deandrea
> Assignee: Goldstein Lyor
> Priority: Major
> Attachments: spxp.usrdump.20382184@AIX72.DMZ.20190417205240026.log
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Hi Lyor,
> We have an Apache SSHD 2.2.0 client and server SSH pair used for local port forwarding of different protocols.
> In our lab environment we found that sometimes when the SSH client for any reason is disconnecting from the SSH server, a DEADLOCK happens on the sshClient regarding the threads in the thread pool.
> We are using builtin nio2 implementation for our SshClient.
> The deadlock is regarding the ClientChannelPendingMessagesQueue class added to fix routing problems for local port forwarding in the past.
> Attached you can find the thread dump taken after the deadlock happend.
>
> Can you please troubleshoot this problem ?
> [^spxp.usrdump.20382184@AIX72.DMZ.20190417205240026.log]
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