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https://issues.apache.org/jira/browse/SSHD-1207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17394055#comment-17394055
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Sreedhar J commented on SSHD-1207:
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I have enabled the trace and attached it here. Also , plz check the attached
image, it shows few bytes are not received from the Server.
> Large file get using WinSCP with Apache SFTP Server is not working
> ------------------------------------------------------------------
>
> Key: SSHD-1207
> URL: https://issues.apache.org/jira/browse/SSHD-1207
> Project: MINA SSHD
> Issue Type: Question
> Reporter: Sreedhar J
> Priority: Major
> Attachments: largefile_issue.png, sshdnativelogs.log
>
>
> We have been using Apache SSHD version 2.5.1 for SFTP Server functionaity and
> it was working very well with all the sftp clients. Recently we have
> upgraded 2.7.0 and facing issues with largefile downloads using WinSCP.
> Entire file is not getting downloaded. Some time with out downloading the
> entire file WinSCP is showing the transfer as complete. In the Apache SSHD
> logs, I see many EOF status messages to the client. Not sure why so many
> EOF messages are exchanged between the client and Server.
> 04 Aug 2021 21:38:10,841 [sshd-SftpSubsystem-46473-thread-1] DEBUG
> Nio2Session - writeBuffer(Nio2Session[local=/10.15.102.66:59119,
> remote=10.84.42.167/10.84.42.167:59334]) writing 16448 bytes
> 04 Aug 2021 21:38:10,842 [sshd-SftpSubsystem-46473-thread-1] DEBUG
> SftpSubsystem -
> process(ServerSessionImpl[testuser1@10.84.42.167/10.84.42.167:59334])[length=53,
> type=SSH_FXP_READ, id=4884997] processing
> 04 Aug 2021 21:38:10,842 [sshd-SshServer[6ad1bbb8](port=59119)-nio2-thread-1]
> DEBUG ServerSessionImpl -
> encode(ServerSessionImpl[testuser1@10.84.42.167/10.84.42.167:59334]) packet
> #149 sending command=94[SSH_MSG_CHANNEL_DATA] len=10734
> 04 Aug 2021 21:38:10,842 [sshd-SftpSubsystem-46473-thread-1] DEBUG
> SftpSubsystem -
> doSendStatus(ServerSessionImpl[testuser1@10.84.42.167/10.84.42.167:59334])[id=4884997]
> SSH_FXP_STATUS (substatus=SSH_FX_EOF, lang=, msg=End of file)
> 04 Aug 2021 21:38:10,842 [sshd-SftpSubsystem-46473-thread-1] DEBUG
> SftpSubsystem -
> process(ServerSessionImpl[testuser1@10.84.42.167/10.84.42.167:59334])[length=53,
> type=SSH_FXP_READ, id=4885253] processing
> 04 Aug 2021 21:38:10,842 [sshd-SftpSubsystem-46473-thread-1] DEBUG
> SftpSubsystem -
> doSendStatus(ServerSessionImpl[testuser1@10.84.42.167/10.84.42.167:59334])[id=4885253]
> SSH_FXP_STATUS (substatus=SSH_FX_EOF, lang=, msg=End of file)
> 04 Aug 2021 21:38:10,843 [sshd-SshServer[6ad1bbb8](port=59119)-nio2-thread-1]
> DEBUG Nio2Session - writeBuffer(Nio2Session[local=/10.15.102.66:59119,
> remote=10.84.42.167/10.84.42.167:59334]) writing 10800 bytes
> 04 Aug 2021 21:38:10,843 [sshd-SshServer[6ad1bbb8](port=59119)-nio2-thread-1]
> DEBUG ServerSessionImpl -
> encode(ServerSessionImpl[testuser1@10.84.42.167/10.84.42.167:59334]) packet
> #150 sending command=94[SSH_MSG_CHANNEL_DATA] len=41
> 04 Aug 2021 21:38:10,843 [sshd-SshServer[6ad1bbb8](port=59119)-nio2-thread-1]
> DEBUG Nio2Session - writeBuffer(Nio2Session[local=/10.15.102.66:59119,
> remote=10.84.42.167/10.84.42.167:59334]) writing 96 bytes
> 04 Aug 2021 21:38:10,843 [sshd-SshServer[6ad1bbb8](port=59119)-nio2-thread-1]
> DEBUG ServerSessionImpl -
> encode(ServerSessionImpl[testuser1@10.84.42.167/10.84.42.167:59334]) packet
> #151 sending command=94[SSH_MSG_CHANNEL_DATA] len=41
> 04 Aug 2021 21:38:10,843 [sshd-SshServer[6ad1bbb8](port=59119)-nio2-thread-1]
> DEBUG Nio2Session - writeBuffer(Nio2Session[local=/10.15.102.66:59119,
> remote=10.84.42.167/10.84.42.167:59334]) writing 96 bytes
> 04 Aug 2021 21:38:11,038 [sshd-SshServer[6ad1bbb8](port=59119)-nio2-thread-8]
> DEBUG ChannelSession - handleData(ChannelSession[id=0,
> recipient=256]-ServerSessionImpl[testuser1@10.84.42.167/10.84.42.167:59334])
> SSH_MSG_CHANNEL_DATA len=57
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