[jira] [Commented] (SSHD-738) "BufferException: Underflow" warning is frequently reported

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https://issues.apache.org/jira/browse/SSHD-738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16218824#comment-16218824
 ] 

Hugo Arès commented on SSHD-738:
--------------------------------

here is the client info:

[2017-10-25 16:21:37,375] [NioProcessor-43] DEBUG 
org.apache.sshd.server.session.ServerSessionImpl : 
readIdentification(ServerSessionImpl[null@/xxx.xxx.xxx.xxx:38284]) client 
version string: SSH-2.0-OpenSSH_5.3
[2017-10-25 16:21:37,592] [NioProcessor-43] WARN  
org.apache.sshd.server.session.ServerSessionImpl : 
exceptionCaught(ServerSessionImpl[user@/xxx.xxx.xxx.xxx:38284])[state=Opened] 
BufferException: Underflow: requested=4, available=0

[2017-10-25 16:21:36,093] [NioProcessor-34] DEBUG 
org.apache.sshd.server.session.ServerSessionImpl : 
readIdentification(ServerSessionImpl[null@/xxx.xxx.xxx.xxx:38030]) client 
version string: SSH-2.0-OpenSSH_5.3
[2017-10-25 16:21:36,220] [NioProcessor-34] WARN  
org.apache.sshd.server.session.ServerSessionImpl : 
exceptionCaught(ServerSessionImpl[user@/xxx.xxx.xxx.xxx:38030])[state=Opened] 
BufferException: Underflow: requested=4, available=0

[2017-10-25 16:21:30,196] [NioProcessor-39] DEBUG 
org.apache.sshd.server.session.ServerSessionImpl : 
readIdentification(ServerSessionImpl[null@/xxx.xxx.xxx.xxx:35448]) client 
version string: SSH-2.0-OpenSSH_5.3
[2017-10-25 16:21:30,366] [NioProcessor-39] WARN  
org.apache.sshd.server.session.ServerSessionImpl : 
exceptionCaught(ServerSessionImpl[user@/xxx.xxx.xxx.xxx:35448])[state=Opened] 
BufferException: Underflow: requested=4, available=0

> "BufferException: Underflow" warning is frequently reported
> -----------------------------------------------------------
>
>                 Key: SSHD-738
>                 URL: https://issues.apache.org/jira/browse/SSHD-738
>             Project: MINA SSHD
>          Issue Type: Bug
>    Affects Versions: 1.2.0
>         Environment: Gerrit Code Review
>            Reporter: David Ostrovsky
>              Labels: monitor
>
> Since upgrade to 1.2.0 Gerrit users report this warning being frequently 
> reported:
> {noformat}
> [2017-04-05 09:21:22,246] [sshd-SshServer[3b6c7bae]-nio2-thread-18] WARN  
> org.apache.sshd.server.session.ServerSessionImpl : 
> exceptionCaught(ServerSessionImpl[xxxx@/yyyyy:47277])[state=Opened] 
> BufferException: Underflow
> {noformat}
> It worth mention, that other SSHD users reported similar problem: 
> https://jira.atlassian.com/browse/BAM-17773.



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