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From "Goldstein Lyor (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SSHD-768) Avoid unbounded message queueing when sending large amounts of data to slow clients
Date Wed, 06 Sep 2017 04:49:00 GMT

     [ https://issues.apache.org/jira/browse/SSHD-768?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Goldstein Lyor reassigned SSHD-768:
-----------------------------------

    Assignee: Goldstein Lyor

> Avoid unbounded message queueing when sending large amounts of data to slow clients
> -----------------------------------------------------------------------------------
>
>                 Key: SSHD-768
>                 URL: https://issues.apache.org/jira/browse/SSHD-768
>             Project: MINA SSHD
>          Issue Type: New Feature
>            Reporter: jpalacios
>            Assignee: Goldstein Lyor
>              Labels: stability
>
> Our application runs an Apache MINA server to provide SSH support. We are seeing {{OutOfMemoryError}}
s when certain clients establish a session with a large {{Window}} size. Particularly clients
like TortoiseGit (which uses TortoisePlink which in turn seems to use Putty) use an initial
window size of 2GB. From heap dumps we can see that the {{DefaultWriteRequestQueue}} is filling
up with {{WriteRequest}} instances and taking up gigabytes of space until the heap blows.




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