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Posted to dev@mina.apache.org by "Roberto Deandrea (Jira)" <ji...@apache.org> on 2021/11/15 07:57:00 UTC
[jira] [Commented] (SSHD-1215) WinsCP transfer failure to Apache SSHD Server
[ https://issues.apache.org/jira/browse/SSHD-1215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17443610#comment-17443610 ]
Roberto Deandrea commented on SSHD-1215:
----------------------------------------
Hi Thomas,
I know that this is not the right place to ask this kind of question but I did not find any right place for that.
Do you know when is scheduled the release of next Apache SSHD version (a.k.a 2.7.1) ?
Kind Regards
Roberto
> WinsCP transfer failure to Apache SSHD Server
> ---------------------------------------------
>
> Key: SSHD-1215
> URL: https://issues.apache.org/jira/browse/SSHD-1215
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 2.6.0
> Reporter: Roberto Deandrea
> Assignee: Thomas Wolf
> Priority: Blocker
> Fix For: 2.7.1
>
> Attachments: logs.zip
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Hi
> I have a failure transferring small files from a WinSCP SFTP client version 5.19.2 to a front-end Apache SSHD Server 2.6.0.
> The front-end Apache SSHD server is configured with a Filesystem built upon SFTPFileSystemProvider to proxy files to an Apache SSHD back-end server.
> WinSCP SFTP transfer files successfully directly to back-end Apache SSHD Server.
> I traced the SFTP file transfer on the front-end server and back-end server and it seems that something get wrong in the remote FileSystem set on the front-end server.
> From traces it seems that the first chunk of file is received correctly by the back-end server, but something is wrong on the second chuck of file transmitted.
> -------------------------------------------------------------------------------------------------------------------------
> First SSH_FXP_WRITE chunk received from front-end server :
> [16/09/21 09:18:26:364 CEST] 00000175 id=00000000 org.apache.sshd.sftp.server.AbstractSftpSubsystemHelper 1 process process(ServerSessionImpl[allfuser1@/172.18.202.33:55400])[length=32757, type=SSH_FXP_WRITE, id=19718] processing
> [16/09/21 09:18:26:364 CEST] 00000175 id=00000000 org.apache.sshd.sftp.server.SftpSubsystem 3 doWrite doWrite(ServerSessionImpl[allfuser1@/172.18.202.33:55400])[id=19718] *SSH_FXP_WRITE (handle=de6fcf635cb34b0e6d3d56643b7539a3[[/upload/rsa.key|https://issues.apache.org/upload/rsa.key]], offset=0, data=byte[32704])*
> First SSH_FXP_WRITE chunk sent by front-end SFTP client to back.end-server :
> [16/09/21 09:18:26:913 CEST] 00000175 id=00000000 org.apache.sshd.sftp.client.impl.DefaultSftpClient 3 send send(SftpChannelSubsystem[id=0, recipient=0]-ClientSessionImpl[DMZ/172.18.202.33/allfuser1@/10.6.6.22:6471][sftp]) cmd=SSH_FXP_WRITE, len=32752, id=139
> [16/09/21 09:18:27:010 CEST] 00000175 id=00000000 org.apache.sshd.sftp.client.impl.AbstractSftpClient 3 checkResponseStatus checkResponseStatus(SftpChannelSubsystem[id=0, recipient=0]-ClientSessionImpl[DMZ/172.18.202.33/allfuser1@/10.6.6.22:6471][sftp])[id=139] cmd=SSH_FXP_WRITE status=SSH_FX_OK lang= msg=
>
> First SSH_FXP_WRITE chunk received succesfully from back-end server :
> [16/09/21 09:18:27:007 CEST] 00005c15 id=00000000 org.apache.sshd.sftp.server.SftpSubsystem 3 doWrite doWrite(ServerSessionImpl[DMZ/172.18.202.33/allfuser1@/10.6.6.22:34445])[id=139] *SSH_FXP_WRITE (handle=c88cfd55dd514ccdd0428571191f5ea1[[/upload/rsa.key|https://issues.apache.org/upload/rsa.key]], offset=0, data=byte[32704])*
> [16/09/21 09:18:27:545 CEST] 00005c15 id=00000000 org.apache.sshd.sftp.server.AbstractSftpSubsystemHelper 1 process process(ServerSessionImpl[DMZ/172.18.202.33/allfuser1@/10.6.6.22:34445])[length=32757,
>
> -----------------------------------------------------------------------------------------------------
> Second SSH_FXP_WRITE chunk received from front-end server:
> [16/09/21 09:18:27:012 CEST] 00000175 id=00000000 org.apache.sshd.sftp.server.AbstractSftpSubsystemHelper 1 process process(ServerSessionImpl[allfuser1@/172.18.202.33:55400])[length=32757, type=SSH_FXP_WRITE, id=19974] processing
> [16/09/21 09:18:27:013 CEST] 00000175 id=00000000 org.apache.sshd.sftp.server.SftpSubsystem 3 doWrite doWrite(ServerSessionImpl[allfuser1@/172.18.202.33:55400])[id=19974] *SSH_FXP_WRITE (handle=de6fcf635cb34b0e6d3d56643b7539a3[[/upload/rsa.key|https://issues.apache.org/upload/rsa.key]], offset=32704, data=byte[32704])*
>
> Second SSH_FXP_WRITE chunk sent by front-end SFTP client to back-end server:
> [16/09/21 09:18:27:473 CEST] 00000175 id=00000000 org.apache.sshd.sftp.client.impl.DefaultSftpClient 3 send send(SftpChannelSubsystem[id=0, recipient=0]-ClientSessionImpl[DMZ/172.18.202.33/allfuser1@/10.6.6.22:6471][sftp]) cmd=SSH_FXP_WRITE, len=32752, *id=141*
>
> Second SSH_FXP_WRITE chunk received from back-end server:
> type=SSH_FXP_WRITE, *id=141*] processing
> [16/09/21 09:18:27:545 CEST] 00005c15 id=00000000 org.apache.sshd.sftp.server.SftpSubsystem 3 doWrite doWrite(ServerSessionImpl[DMZ/172.18.202.33/allfuser1@/10.6.6.22:34445])[*id=141*] SSH_FXP_WRITE (handle=c88cfd55dd514ccdd0428571191f5ea1[[/upload/rsa.key|https://issues.apache.org/upload/rsa.key]], *offset=0, data=byte[32704*])
> Now the back-end server complains about this data. The back-end server is expecting a chunk of data at offset=32704 and not offset = 0.
> java.io.IOException: position([/upload/rsa.key|https://issues.apache.org/upload/rsa.key]) *illegal file channel position, expected frsPosition: 32704, found: 0*
> This is a blocking error and causes the connection closing of the parts involved.
> ----------------------------------------------------------------------------------------------------------------------
> Full traces are attached to this jira.
>
> Questions and considerations.
> # Is this a known problem and is fixed in the latest release of Apache SSHD?
> # If this is a new problem can you suggest me how to fix it, or better troubleshoot it
> # Let me know if you need further info for troubleshooting
>
> Thanks in advance for your support
>
> Kind Regards
> Roberto Deandrea
>
>
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