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https://issues.apache.org/jira/browse/SSHD-640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17182715#comment-17182715
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Lyor Goldstein commented on SSHD-640:
-------------------------------------
I am not sure if this explains the issue, but I do see a problem -
{{ShellImpl#destroy}} calls {{callback.onExit}} - the correct place for this
call for this is when {{run()}} exits - either successfully (in which case
recommend calling {{onExit(0)}}) or due to some error/exception - (in which
case recommend calling {{onExit(non-zero)}}) - see example [this
documentation|https://github.com/apache/mina-sshd/blob/master/docs/commands.md#remote-command-execution]
> Streams are not flushed from SSH Command
> ----------------------------------------
>
> Key: SSHD-640
> URL: https://issues.apache.org/jira/browse/SSHD-640
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 1.0.0
> Reporter: Eugene Petrenko
> Assignee: Guillaume Nodet
> Priority: Minor
> Fix For: 2.0.0
>
>
> I create a command with ordinary streams. In command implementation I create
> thread, write several bytes from the tread to the OutputStream. And exit the
> command.
> The result is empty from client view. Adding explicit flush solves the issue.
> I'd expect output streams are flushed implicitly before command end is sent
> from a server to a client
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