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https://issues.apache.org/jira/browse/DIRMINA-1070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16148493#comment-16148493
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jpalacios commented on DIRMINA-1070:
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Actually we receive one message which is a request for data (which can be GBs
in size), and we use a {{org.apache.sshd.server.Command}} implementation to
write to the provided {{OutputStream}}. We don't load all the data in memory at
any point (except when Apache MINA queues it in the unbounded
{{DefaultWriteRequestQueue}}).
> Avoid unbounded message queueing when sending large amounts of data to slow
> clients
> -----------------------------------------------------------------------------------
>
> Key: DIRMINA-1070
> URL: https://issues.apache.org/jira/browse/DIRMINA-1070
> Project: MINA
> Issue Type: New Feature
> Components: Core
> Reporter: jpalacios
> 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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