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From "Denis Tulskiy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SSHD-145) InvertedShellWrapper may not send process output back if process exits too fast
Date Fri, 09 Sep 2011 12:19:08 GMT
InvertedShellWrapper may not send process output back if process exits too fast
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                 Key: SSHD-145
                 URL: https://issues.apache.org/jira/browse/SSHD-145
             Project: MINA SSHD
          Issue Type: Bug
    Affects Versions: 0.5.0
         Environment: Usually does not reproduce on windows, often on linux (Ubuntu 11.04)
            Reporter: Denis Tulskiy
            Priority: Minor


In InvertedShellWrapper, pumpStreams() method first checks if the process is alive, and only
then pumps streams. It could happen that after the process has already exited, some information
is left out in out or err streams. Moving the check for shell.isAlive() after all pumpStream()
calls seems to resolve the issue.

I've uploaded a patch for your convenience here https://gist.github.com/1206056

steps to reproduce:

1. create a default server
2. set command factory as described at http://mina.apache.org/sshd/tips.html
3. run `ssh localhost -p 8000 echo test`

expected result:
command output is `test`

actual result:
usually nothing is printed even though the command is executed



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