paramiko.ssh_exception.SSHException: Expecting packet from (31,), got 94
Question: When I use pysftp-0.2.8 to send a Large files to my sftp service. it always
got the same error：paramiko.ssh_exception.SSHException: Expecting packet from
(31,), got 94

The file is about 1.5G , when it transfers at 500M, it break. code here:

    
    
    import pysftp
    upftp=FTP(host=ftp_ip, user=ftp_name, passwd=ftp_passwd, acct=ftp_port, timeout=None)
    ...
    
    try:
        upftp.storbinary('STOR %s'%obj[2], fp, 8192, self.callpecent)      
    except Exception as error:
        fp.close()
        self.endit(upftp, 1, '%s,%s'%(obj[2],error), '%s,%s'%(obj[2],error)
    

)

the error message at here:

    
    
    2015-03-24 09:43:05  DEBUG - Rekeying (hit 32729 packets, 536900100 bytes sent)
    
    2015-03-24 09:43:05  DEBUG - Ciphers agreed: local=aes128-ctr, remote=aes128-ctr
    2015-03-24 09:43:05  DEBUG - 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
    2015-03-24 09:43:05  ERROR - Exception: Expecting packet from (31,), got 94
    2015-03-24 09:43:05  ERROR - Traceback (most recent call last):
    2015-03-24 09:43:05  ERROR -   File "D:\Python34\lib\site-packages\paramiko-1.14.0-py3.4.egg\paramiko\transport.py", line 1435, in run
    2015-03-24 09:43:05  ERROR -     raise SSHException('Expecting packet from %r, got %d' % (self._expected_packet, ptype))
    2015-03-24 09:43:05  ERROR - paramiko.ssh_exception.SSHException: Expecting packet from (31,), got 94
    2015-03-24 09:43:05  ERROR - 
    2015-03-24 09:43:05  DEBUG - Dropping user packet because connection is dead.
    2015-03-24 09:43:05  DEBUG - [chan 1] close(b'd40b000000000000')
    2015-03-24 09:43:05  INFO - [chan 1] sftp session closed.
    

Thank you for your answer !


Answer: I find somethings may be useful :)

    
    
    in the paramiko/packet.py
    
    REKEY_PACKETS = pow(2, 29)
    REKEY_BYTES = pow(2, 29)
    
    REKEY_PACKETS_OVERFLOW_MAX = pow(2, 29)     # Allow receiving this many packets after a re-key request before terminating
    REKEY_BYTES_OVERFLOW_MAX = pow(2, 29)       # Allow receiving this many bytes after a re-key request before terminating
    

and

    
    
        def _trigger_rekey(self):
        # outside code should check for this flag
        self.__need_rekey = True
    

when it use the re-key ,it goes wrong.

