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From "masc (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (SSHD-743) Nio2Session sporadically leaks exceptions from nio2 threads
Date Mon, 13 Nov 2017 11:35:00 GMT

    [ https://issues.apache.org/jira/browse/SSHD-743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16249423#comment-16249423
] 

masc edited comment on SSHD-743 at 11/13/17 11:35 AM:
------------------------------------------------------

ok. I can't further comment on this without digging deeper, but from my current perspective,
expecting and handling the exception in this particular spot by merely logging the incident
would be the right choice. I do not believe that adjusting {{startWrite}} to not throw would
be the right solution here, but it's your choice of course.


was (Author: masc3d):
ok. I can't further comment on this without digging deeper, but from my current perspective,
expecting and handling the exception in this particular spot by merely logging the incident
would be the right choice. I do not believe that adjusting {startWrite} to not throw would
be the right solution here, but it's your choice of course.

> Nio2Session sporadically leaks exceptions from nio2 threads
> -----------------------------------------------------------
>
>                 Key: SSHD-743
>                 URL: https://issues.apache.org/jira/browse/SSHD-743
>             Project: MINA SSHD
>          Issue Type: Bug
>    Affects Versions: 1.3.0, 1.4.0, 1.6.0
>            Reporter: masc
>            Assignee: Goldstein Lyor
>            Priority: Critical
>
> We are using {{sshd-core}} for tcp forwarding/tunnelling.
> Since updating to {{1.3.0}} we see sporadic process terminations caused by exceptions
leaking from nio2 threads.
> I had to downgrade to {{1.2.0}} to stabilise.
> {code}
> 2017-04-21 18:56:28,606 1245641365 sshd-SshServer[4be7acd9]-nio2-thread-3 org.apache.sshd.server.session.ServerSessionImpl
WARN - exceptionCaught(ServerSessionImpl[leoz@/185.17.206.254:21464])[state=Opened] InterruptedByTimeoutException:
null
> 2017-04-21 18:56:28,606 1245641365 sshd-SshServer[4be7acd9]-nio2-thread-3 org.deku.leoz.node.Application
ERROR - Writing not allowed due to timeout or cancellation
> java.lang.IllegalStateException: Writing not allowed due to timeout or cancellation
>     at sun.nio.ch.AsynchronousSocketChannelImpl.write(AsynchronousSocketChannelImpl.java:350)
>     at sun.nio.ch.AsynchronousSocketChannelImpl.write(AsynchronousSocketChannelImpl.java:399)
>     at org.apache.sshd.common.io.nio2.Nio2Session.doWriteCycle(Nio2Session.java:334)
>     at org.apache.sshd.common.io.nio2.Nio2Session.startWriting(Nio2Session.java:318)
>     at org.apache.sshd.common.io.nio2.Nio2Session.finishWrite(Nio2Session.java:393)
>     at org.apache.sshd.common.io.nio2.Nio2Session.handleWriteCycleFailure(Nio2Session.java:387)
>     at org.apache.sshd.common.io.nio2.Nio2Session$2.onFailed(Nio2Session.java:348)
>     at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$failed$1(Nio2CompletionHandler.java:46)
>     at java.security.AccessController.doPrivileged(Native Method)
>     at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.failed(Nio2CompletionHandler.java:45)
>     at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:128)
>     at sun.nio.ch.Invoker$2.run(Invoker.java:218)
>     at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
>     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>     at java.lang.Thread.run(Thread.java:745)
> {code}



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