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From Oliver Stöneberg (JIRA) <j...@apache.org>
Subject [jira] [Commented] (SSHD-635) potential hang in AuthFuture.verify(Long.MAX_VALUE) on error
Date Wed, 03 Feb 2016 14:06:39 GMT

    [ https://issues.apache.org/jira/browse/SSHD-635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15130432#comment-15130432

Oliver Stöneberg commented on SSHD-635:

Thanks a lot. It's quite easy for me to reproduce this and now knowing which part of the code
I have to look at for the error handling I should be able to get more insight in case your
change didn't fix it.

> potential hang in AuthFuture.verify(Long.MAX_VALUE) on error
> ------------------------------------------------------------
>                 Key: SSHD-635
>                 URL: https://issues.apache.org/jira/browse/SSHD-635
>             Project: MINA SSHD
>          Issue Type: Bug
>            Reporter: Oliver Stöneberg
>         Attachments: ssh.log
> It appears that after the SshClient.connect().verify() call was successful the ClientSession.auth().verify()
call might hang if the connection was closed in-between those calls. If AuthFuture.verify()
is called with a timeout it correctly times out, but I would expect it to detect that the
connection is closed/closing and throw a proper error even without the timeout.
> The errors I see in the log are these (more completel log attached):
> DEBUG [sshd-SshClient[329a1f8d]-nio2-thread-5] (Nio2Session.java:137) Caught IOException[An
established connection was aborted by the software in your host machine] - calling handler
> DEBUG [sshd-SshClient[329a1f8d]-nio2-thread-5] (Nio2Session.java:142) Exception handler
threw IllegalStateException, closing the session: No session available
> It's hard to debug for me since it only happens in a multi-threaded scenario and I haven't
been able to generate separate logs per session (is this even possible?)

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