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https://issues.apache.org/jira/browse/SSHD-938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16915779#comment-16915779
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Goldstein Lyor commented on SSHD-938:
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Sorry, nothing comes to mind - like I said, since 0.13.0 we did a +lot+ of work
and code changes - a respectable part of it around sessions, channels, packets
etc The phenomenon described in this issue does not strike any familiar
chord. I recommend perhaps searching older SSHD issues for something similar
(perhaps not for version 0.13 though..)
> SSH sessions being closed with invalid packet length
>
>
> Key: SSHD-938
> URL: https://issues.apache.org/jira/browse/SSHD-938
> Project: MINA SSHD
> Issue Type: Bug
>Affects Versions: 0.13.0
>Reporter: Anudeep
>Assignee: Goldstein Lyor
>Priority: Blocker
> Attachments: server.7z
>
>
> SSH connections are being closed with invalid packet length and TCP
> connection goes into CLOSE_WAIT state and once CLOSE_WAIT state count crosses
> 4 no more SSH connection is being allowed.
> with SSHD-core-0.13.0
>
> Below is the error
> 2019-08-22 09:53:29,106 INFO [org.apache.sshd.server.session.ServerSession]
> (sshd-SshServer[6162dce4]-nio2-thread-2) Error decoding packet (invalid
> length) a5 5f 74 5f a6 6f ea 41 02 c0 0a 54 83 22 e4 77 53 7d 0d b9 25 de 36
> 1d 07 cb cd 43 66 95 51 b2 72 54 d5 4e 2d 0a d5 17 f4 5e 81 4d 6a b8 ab f7 00
> bf 4d 40 f5 56 b7 61 9b 8a be fe 54 d4 89 a2 c5 07 3c de 25 95 44 18 4f 90 dc
> aa 5b de 40 85 71 12 cc f6 c0 34 8d 0e 75 95 a5 5b 8d f6 b9 f6 94 04 d8 b5 25
> 5c d5 58 06 d1 82 68 13 2f 4c a0 ee 78 6b 20 97 52 2d 93 4c 88 bc 17 53 ca eb
> 34 23 c1 c6 1e 5a f9 31 e7 52 f9 ef 88 03 de e8 af ba 11 5e 97 50 1e c2 26 ba
> 80 34 55 3f 38 49 0c a9 80 8c a3 fe 6f b6 b6 5d 45 41 e9 e0 e6 d5 15 d6 44 f8
> c42019-08-22 09:53:29,106 INFO
> [org.apache.sshd.server.session.ServerSession]
> (sshd-SshServer[6162dce4]-nio2-thread-2) Error decoding packet (invalid
> length) a5 5f 74 5f a6 6f ea 41 02 c0 0a 54 83 22 e4 77 53 7d 0d b9 25 de 36
> 1d 07 cb cd 43 66 95 51 b2 72 54 d5 4e 2d 0a d5 17 f4 5e 81 4d 6a b8 ab f7 00
> bf 4d 40 f5 56 b7 61 9b 8a be fe 54 d4 89 a2 c5 07 3c de 25 95 44 18 4f 90 dc
> aa 5b de 40 85 71 12 cc f6 c0 34 8d 0e 75 95 a5 5b 8d f6 b9 f6 94 04 d8 b5 25
> 5c d5 58 06 d1 82 68 13 2f 4c a0 ee 78 6b 20 97 52 2d 93 4c 88 bc 17 53 ca eb
> 34 23 c1 c6 1e 5a f9 31 e7 52 f9 ef 88 03 de e8 af ba 11 5e 97 50 1e c2 26 ba
> 80 34 55 3f 38 49 0c a9 80 8c a3 fe 6f b6 b6 5d 45 41 e9 e0 e6 d5 15 d6 44 f8
> c42019-08-22 09:53:29,106 DEBUG [org.apache.sshd.common.io.nio2.Nio2Session]
> (sshd-SshServer[6162dce4]-nio2-thread-2) Caught exception, now calling
> handler2019-08-22 09:53:29,106 WARN
> [org.apache.sshd.server.session.ServerSession]
> (sshd-SshServer[6162dce4]-nio2-thread-2) Exception caught:
> org.apache.sshd.common.SshException: Invalid packet length: -16976455 at
> org.apache.sshd.common.session.AbstractSession.decode(AbstractSession.java:677)
> [sshd-core-0.13.0.jar:0.13.0] at
> org.apache.sshd.common.session.AbstractSession.messageReceived(AbstractSession.java:283)
> [sshd-core-0.13.0.jar:0.13.0] at
> org.apache.sshd.common.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:54)
> [sshd-core-0.13.0.jar:0.13.0] at
> org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:184)
> [sshd-core-0.13.0.jar:0.13.0] at
> org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:170)
> [sshd-core-0.13.0.jar:0.13.0] at
> org.apache.sshd.common.io.nio2.Nio2CompletionHandler$1.run(Nio2CompletionHandler.java:32)
> [sshd-core-0.13.0.jar:0.13.0] at
> java.security.AccessController.doPrivileged(Native Method) [rt.jar:1.8.0_172]
> at
> org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:30)
> [sshd-core-0.13.0.jar:0.13.0] at
> sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126) [rt.jar:1.8.0_172] at
> sun.nio.ch.Invoker$2.run(Invoker.java:218) [rt.jar:1.8.0_172] at
> sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
> [rt.jar:1.8.0_172] at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> [rt.jar:1.8.0_172]
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