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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Work logged] (SSHD-911) Deadlock in Apache SshClient used for local port forwarding
Date Tue, 30 Apr 2019 05:15:01 GMT

     [ https://issues.apache.org/jira/browse/SSHD-911?focusedWorklogId=235066&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-235066
]

ASF GitHub Bot logged work on SSHD-911:
---------------------------------------

                Author: ASF GitHub Bot
            Created on: 30/Apr/19 05:14
            Start Date: 30/Apr/19 05:14
    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
 
 
   
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 235066)
    Time Spent: 20m  (was: 10m)

> 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, spxp.usrdump.33095980@AIX72.DMZ.20190423123751496.log
>
>          Time Spent: 20m
>  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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