Strange behaviour of GnuGk 2.2.5

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Hi all.

I've found a strange bug (?) in gnugk 2.2.5. After some working time gk 
starts to drop calls with reason 102 (Recovery from timer expiry).
Log tells me that gk can't establish Q931 TCP connection wih remote party:

2007/02/17 18:45:12.290 3       ProxyChannel.cxx(2946)  Q931    Connect 
to xx.xx.xx.xx:1720 from yy.yy.yy.yy:0 successful
2007/02/17 18:45:12.290 3           yasocket.cxx(654)   Q931d   
xx.xx.xx.xx:1720 Error(1): Input/output error (12:57)
2007/02/17 18:45:12.290 3       ProxyChannel.cxx(2618)  Q931    Timed 
out waiting for a response to Setup message from xx.xx.xx.xx:1720

So looks like gk gets some bad info from destinaion.. But from that 
moment many calls to different ip-addresses drop with the same error.
I calculated that there was 15% of successful calls to usual value.
After restarting gk returns to the normal state: calls are going through 
with no problem.

I'm not sure that it is a gnugk problem, maybe calls drop due to tcp/ip 
full socket buffers etc.

Gnugk 2.2.5, release version with the prefix prioroty patch. Failover is 
enabled, full proxy mode.
OpenH323 1.18.0, PWLib 1.10.0. FreeBSD 6.1-Release.

Does anybody have similar problems?

Regards,
Alex.

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