[zeromq-dev] Erratic failure to connect to an inproc socket

gonzalo diethelm gdiethelm at dcv.cl
Thu Apr 1 13:15:38 CEST 2010

> > WinXP SP3, using Java binding and current (git) 0MQ2.
> >
> > I am creating a REQ socket and connecting it to "inproc://pipe".
> > Sometimes the zmq_connect() returns -1 and the error code is set to
> > 156384719, which zmq_strerror() prints out as "Unknown error".
> > can give me any hints to find out what's going on here?
> It's ECONREFUSED. Win32 doesn't define that error code so 0MQ does it
> itself. However, zmq_strerror doesn't translate it to human readable
> stering. I'll fill up a ticket for the issue.

Ok, that clears up what error we are talking about. But what would cause
an inproc socket connection to be refused? If the other end has not come
up yet, the connection will be retried, right?

BTW, my copy of WinError.h has


and WinSock2.h has the following (consistent with WinError.h):

#define WSABASEERR              10000

Regarding zmq_strerror, would you consider a patch that prepends the
numeric error value to the string that describes it? That way, for
EADDRINUSE (under Windows) you would get the string "10048 - Address in
use". Perhaps "EADDRINUSE - Address in use" or "10048 - EADDRINUSE -
Address in use" would be even more informative. This might help find out
the cause for errors.

Gonzalo Diethelm

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