Bugs item #3517451, was opened at 2012-04-13 03:21
Message generated for change (Comment added) made by bagder
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Category: SCP/SFTP
Group: wrong behaviour
>Status: Pending
Resolution: None
Priority: 5
Private: No
Submitted By: Daniel Theron (blackcat101)
Assigned to: Daniel Stenberg (bagder)
Summary: cURL with sftp strange behaviour after connection drop

Initial Comment:
Hi there,

Not sure if its the right place to log this ticket because it seems to be the libssh2 package affecting cURL.

I created a 70mb file and transferred it using the command below:
curl --connect-timeout 1 --retry 1 -# -k -u athed:Helpme12 -T file14 sftp://172.21.2.232/

The file sftp speed was about 2 seconds per 10% completion while transferring (+- 20 seconds for 100% completion)

When a connection drop occurred while transferring, cURL's progress bar paused. When the connection came up again, cURL resumed the transfer but the transfer speed changed to a slower speed of +- 5 seconds per 10% completion.

Hope you will be able to duplicate this strange occurance. I was able to duplicate this everytime :)

 $ uname -a
SunOS V240-rd-2 5.10 Generic_147440-12 sun4u sparc SUNW,Sun-Fire-V240

$ curl --version
curl 7.25.0 (sparc-sun-solaris2.10) libcurl/7.25.0 OpenSSL/1.0.1 zlib/1.2.6 libidn/1.24 libssh2/1.4.1
Protocols: dict file ftp ftps gopher http https imap imaps pop3 pop3s rtsp scp sftp smtp smtps telnet tftp
Features: IDN IPv6 Largefile NTLM NTLM_WB SSL libz TLS-SRP

Thanks,
Daniel

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>Comment By: Daniel Stenberg (bagder)
Date: 2012-05-12 14:52

Message:
Can you please retry with a libssh2 daily build from May 13 2012 or later?
I suspect you saw the symptoms of a libssh2 bug we've fixed there.

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Comment By: Daniel Stenberg (bagder)
Date: 2012-05-12 14:52

Message:
Thanks for reporting this issue and helping us improve curl and libcurl.

We're awaiting feedback in this issue. Due to this, I have set the state of
this issue to pending and it will automatically get closed later on unless
we get further info.

Please consider answering the outstanding questions or providing the
missing info so that we can proceed to resolve this issue!

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Comment By: Daniel Stenberg (bagder)
Date: 2012-05-06 15:20

Message:
This sounds like a libssh2 problem. Any chance you can try to repeat this
strangeness with a libssh2 example code and then take the problem to the
libssh2-devel if it remains?

It could be related to the "read-ahead" system libssh2 is using with SFTP.

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You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=100976&aid=3517451&group_id=976
Received on 2012-05-12