[paramiko] paramiko stops responding after huge data is transferred !

[Dwayne Litzenberger]

On April 15, 2008 11:02:14 am Dwayne Litzenberger wrote:
> More on this as I find out...

In the main thread:

Channel.send acquires Channel.lock, calls Channel._wait_for_send_window, then 
calls Transport._send_user_message with a MSG_CHANNEL_DATA message. 
Transport._send_user_message then waits for Transport.clear_to_send to be 
set, but it's not set for some reason.  Note that Channel.lock is still held 
by the main thread.

Meanwhile, the Transport thread tries to process a MSG_WINDOW_ADJUST message.  
It calls Channel._window_adjust, but that can't proceed until Channel.lock is 
released.

At this point, the main thread and the Transport thread are deadlocked.

Remaining question: Why is Transport._parse_newkeys the only place where 
Transport.clear_to_send is set?  Can't we resume sending as soon as *our own*  
MSG_NEWKEYS is transmitted?

-- 
Dwayne Litzenberger, B.A.Sc.
Information Technology Analyst

Open Systems Canada Limited
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