On 13 Jun, Dave Dykstra wrote:
> On Tue, Jun 13, 2000 at 08:55:50AM -0500, Dave Dykstra wrote:
>> Here's the status of the most recent releases of rsync:
>> 2.4.3 - sets O_NONBLOCK on stdin and stdout. There haven't been
>> reports that it still hangs ssh, but there have been numerous
>> reports that it gets rsync protocol errors ("unexpected tag" is the
>> one most often reported). I wonder if ssh can't completely handle
>> being in non-blocking mode, and I wonder if Wout's patch would solve
>> those problems.
>> 2.4.2 - similar to 2.4.3 except that it didn't work with rsh so it was
>> shortlived.
>
> Actually I just looked more closely and it appears that rsync is only
> setting O_NONBLOCK on stdout in 2.4.3; that was the change between 2.4.2
> and 2.4.3 to make rsh work again. It is still initially setting
> O_NONBLOCK on both stdin and stdout but just before it execs rsh or ssh in
> the child process it turns O_NONBLOCK off on stdin.
We have experienced blockings with rsync 2.4.3 when used in conjunction
with ssh-2. The blockings only occur when we are fetching large files
from the remote host. The problems went away when I added a wrapper
around ssh which made stdin & stdout nonblocking.
/MaF
