greetings,
i have one instance of sftp client where routinely file transfers don't
complete.
yet, the command line sftp completes the download. my client setup is paramiko
1.7.6,
os x leopard (10.5.x), python 2.54; server setup: ubuntu 9.04 x64.
here's the log from a 'failed' transmission:
DEB [20100125-16:47:03.805] thr=1 paramiko.transport: starting thread (client
mode): 0x7a5d50L
INF [20100125-16:47:03.849] thr=1 paramiko.transport: Connected (version 2.0,
client OpenSSH_5.1)
DEB [20100125-16:47:03.900] thr=1 paramiko.transport: kex
algos:['diffie-hellman-group-exchange-sha256',
'diffie-hellman-group-exchange-sha1', 'diffie-hellman-group14-sha1',
'diffie-hellman-group1-sha1'] server key:['ssh-rsa', 'ssh-dss'] client
encrypt:['aes128-cbc', '3des-cbc', 'blowfish-cbc', 'cast128-cbc', 'arcfour128',
'arcfour256', 'arcfour', 'aes192-cbc', 'aes256-cbc',
'rijndael-...@lysator.liu.se', 'aes128-ctr', 'aes192-ctr', 'aes256-ctr'] server
encrypt:['aes128-cbc', '3des-cbc', 'blowfish-cbc', 'cast128-cbc', 'arcfour128',
'arcfour256', 'arcfour', 'aes192-cbc', 'aes256-cbc',
'rijndael-...@lysator.liu.se', 'aes128-ctr', 'aes192-ctr', 'aes256-ctr'] client
mac:['hmac-md5', 'hmac-sha1', 'umac...@openssh.com', 'hmac-ripemd160',
'hmac-ripemd...@openssh.com', 'hmac-sha1-96', 'hmac-md5-96'] server
mac:['hmac-md5', 'hmac-sha1', 'umac...@openssh.com', 'hmac-ripemd160',
'hmac-ripemd...@openssh.com', 'hmac-sha1-96', 'hmac-md5-96'] client
compress:['none', 'z...@openssh.com'] server compress:['none',
'z...@openssh.com'] client lang:[''] server lang:[''] kex follows?False
DEB [20100125-16:47:03.900] thr=1 paramiko.transport: Ciphers agreed:
local=aes128-ctr, remote=aes128-ctr
DEB [20100125-16:47:03.901] thr=1 paramiko.transport: using kex
diffie-hellman-group1-sha1; server key type ssh-rsa; cipher: local aes128-ctr,
remote aes128-ctr; mac: local hmac-sha1, remote hmac-sha1; compression: local
none, remote none
DEB [20100125-16:47:04.063] thr=1 paramiko.transport: Switch to new keys ...
DEB [20100125-16:47:04.108] thr=1 paramiko.transport: userauth is OK
INF [20100125-16:47:04.222] thr=1 paramiko.transport: Authentication
(password) successful!
DEB [20100125-16:47:04.229] thr=2 paramiko.transport: [chan 1] Max packet in:
34816 bytes
DEB [20100125-16:47:04.275] thr=1 paramiko.transport: [chan 1] Max packet
out: 32768 bytes
INF [20100125-16:47:04.275] thr=1 paramiko.transport: Secsh channel 1 opened.
DEB [20100125-16:47:04.339] thr=1 paramiko.transport: [chan 1] Sesch channel
1 request ok
INF [20100125-16:47:04.390] thr=2 paramiko.transport.sftp: [chan 1] Opened
sftp connection (server version 3)
DEB [20100125-16:47:04.391] thr=2 paramiko.transport.sftp: [chan 1]
stat('home')
DEB [20100125-16:47:04.455] thr=2 paramiko.transport.sftp: [chan 1]
normalize('home')
DEB [20100125-16:47:04.521] thr=2 paramiko.transport.sftp: [chan 1]
stat('/home/g_4bf9ef06ff0311de856b9dc5b248ddb9.zip.gpg')
DEB [20100125-16:47:04.586] thr=2 paramiko.transport.sftp: [chan 1]
open('/home/g_4bf9ef06ff0311de856b9dc5b248ddb9.zip.gpg', 'rb')
DEB [20100125-16:47:04.651] thr=2 paramiko.transport.sftp: [chan 1]
open('/home/g_4bf9ef06ff0311de856b9dc5b248ddb9.zip.gpg', 'rb') -> 00000000
DEB [20100125-16:47:04.651] thr=2 paramiko.transport.sftp: [chan 1]
stat('/home/g_4bf9ef06ff0311de856b9dc5b248ddb9.zip.gpg')
DEB [20100125-16:50:28.803] thr=2 paramiko.transport.sftp: [chan 1]
close(00000000)
INF [20100125-16:53:28.804] thr=2 paramiko.transport.sftp: [chan 1] sftp
session closed.
DEB [20100125-16:53:28.804] thr=2 paramiko.transport: [chan 1] EOF sent (1)
DEB [20100125-16:53:28.869] thr=1 paramiko.transport: EOF in transport thread
it seems to me that the underlying network (some sort of dsl i have no control
over) is suspect. it doesn't seem to actually drop the
connection but watching the os x command line sftp transfer, there are big
swings in throughput (from 180kpbs to 30 and probably less).
i tried various settings for sftp.sock.settimeout from default to 10 minutes
(600.00). no difference. also, this problem seems to persist on just
about any file size.
any thoughts?
thx.
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