Re: TCP hang with 2.2.14 <-> 2.2.15pre5

[kuznet@xxxxxxxxxxxxx (Alexey Kuznetosv)]

Hello!

> elm is sending acks with window 0 but owl persists in trying to send
> another segment.
> 
> My understanding of TCP is not wonderful, but this doesn't seem correct.

Yes, it really tries to send out-of-window segment. It is not good and it is
not clear why it occured, dumps are too short. Could you prepare dumps
with sequence numbers covering stalled seqno - 64K?

> I would be happy to be told that this is a bug in 2.2.14 that is already
> fixed.

I do not remember. Let's search.

But! Despite of all this, rsync behaves strangely. Window became zero not 
because
of bug in tcp, but because of bug in rsync. If it forgets to read data,
it is deemed to dead-lock soon or later. 

Alexey