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https://issues.apache.org/jira/browse/SSHD-570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14963267#comment-14963267
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Goldstein Lyor commented on SSHD-570:
-------------------------------------
Actually, it can happen if _start_ failed or _destroy_ called before
_exitValue_. Like you, I don't see how this can happen, but since as you say it
occurs 9:10 time, it would help if you debug the _ProcessShell_ class (source
code is also available via Maven) and try to diagnose in more detail what
happens (the command you mention seems strange "echo xxxx | ssh -p @PORT@
root@localhost "cat > /none/exist/path/file"" I cannot run it...)
> NPE while executing a command while redirecting
> -----------------------------------------------
>
> Key: SSHD-570
> URL: https://issues.apache.org/jira/browse/SSHD-570
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 1.0.0
> Environment: java version "1.7.0_85"
> OpenJDK Runtime Environment (IcedTea 2.6.1) (Gentoo icedtea-7.2.6.1-r1)
> OpenJDK 64-Bit Server VM (build 24.85-b03, mixed mode)
> Reporter: Alon Bar-Lev
> Attachments: SSHD.java
>
>
> Try to execute:
> $ echo xxxx | ssh -p @PORT@ root@localhost "cat > /none/exist/path/file"
> You should get the following exception in 9:10 attempts:
> Exception in thread "sshd-shell[855da06]-thread-1"
> java.lang.NullPointerException
> at
> org.apache.sshd.server.shell.ProcessShellFactory$ProcessShell.exitValue(ProcessShellFactory.java:170)
> at
> org.apache.sshd.server.shell.InvertedShellWrapper.pumpStreams(InvertedShellWrapper.java:165)
> at
> org.apache.sshd.server.shell.InvertedShellWrapper$1.run(InvertedShellWrapper.java:125)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> I cannot understand how process can be null in this context.
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