[Vortex] "no data were waiting on this non-blocking connection" warning

[Jens Alfke]

My application's getting repeated Vortex warnings of the form:
	(vortex-frame-factory) no data were waiting on this non-blocking  
connection (EWOULDBLOCK error)
This warning comes from vortex_frame_get_next (vortex_frame_factory: 
914 in my out-of-date sources.) It looks as though it happens when the  
function is called but no data is available from the socket.

Does this actually represent a problem? My program seems to be working  
fine: messages and replies are sent and received correctly. (I believe  
the situation that triggers this warning is when I receive a large  
(32kbyte) reply.)  The warnings get logged at a rate of several per  
second, so they get in the way of my own log messages that I'm trying  
to read.

Thanks,

—Jens
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