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https://issues.apache.org/jira/browse/SSHD-725?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15826529#comment-15826529
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Goldstein Lyor commented on SSHD-725:
-------------------------------------
While I did not find anything out of the ordinary, I have made some changes in
1.4 code that might help with this issue. Please clone the code at [this
branch|https://github.com/lgoldstein/mina-sshd/tree/SSHD-725], compile it and
try again.
To that effect, a few remarks regarding the test code you published - in the
interest of diagnosing the problem.
* Use {{SshServer.setupDefaultServer()}} instead of the builder in order to
obtain an initial server instance
* Don't call {{sshd.setSessionFactory(...)}}
* Try re-producing the issue (if it still occurs after my changes) without
setting the compression factories - perhaps the problem is related to
compression
* Try re-producing the issue without setting the
{{SftpSubsystem.MAX_PACKET_LENGTH_PROP}} value.
While there does not seem to be anything wrong with the test code you wrote, I
would like to minimize as much as possible "white noise" that might be the
result of some unforeseen side effect (which might still be a bug, but let's
deal with one problem at a time).
Let me know how it went.
> SFTP - Some files truncated on retrieval/download
> -------------------------------------------------
>
> Key: SSHD-725
> URL: https://issues.apache.org/jira/browse/SSHD-725
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 1.0.0, 1.2.0, 1.3.0
> Environment: Various flavors of Linux (ubuntu xenial, centos 6, AWS
> AMI 2016.x)
> Reporter: Russ Tennant
> Assignee: Goldstein Lyor
> Attachments: download-lftp-script-output-trace.txt, test-download.data
>
>
> When retrieving files (depending on file size), the files are truncated. We
> have also experienced a similar problem on file upload where we get extra
> data repeated from the last packet received.
> I don't have a test-case for the file upload issue - yet. Still trying to
> find the magic file size.
> I created a github project that demonstrates the truncation issue on
> retrieval.
> Project: https://github.com/VentureTech/sshd-test
> Example lftp Script:
> https://github.com/VentureTech/sshd-test/blob/master/download-lftp-script.txt
> Example lftp Script Output:
> https://github.com/VentureTech/sshd-test/blob/master/download-lftp-script-output.txt
> I used lftp to demonstrate the issue, but it happens with all clients I've
> tried (openssh, Intellij IDEA, kde's sftp ioslave).
> There is a gradle task lftpDownload that will start the server and run the
> lftp script.
> {code}./gradlew lftpDownload{code}
> Attached is the data file I used to trigger the issue.
> In the referenced example output lftp terminates the retrieval with the
> following
> {code}
> [116371] 2017-01-16 15:27:32 localhost <--- got a packet, length=120,
> type=101(STATUS), id=12
> [116371] 2017-01-16 15:27:32 localhost ---- status code=1(EOF),
> message=Internal EOFException: Unable to read 16384 bytes from offset=65536
> of 5c18fc884da4646cb80a4b12519e6f16
> [116371] 2017-01-16 15:27:32 localhost ---- eof
> [116371] 2017-01-16 15:27:32 ---> sending a packet, length=41, type=4(CLOSE),
> id=15
> [116371] 2017-01-16 15:27:32 expected pos=61564, actual pos=49152
> mget: test-download.data: file size decreased during transfer
> {code}
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