[zeromq-dev] Duplicate messages on subscriber reconnect in pub/sub pair

[Benn Bollay]

> > Just to clarify - I don't believe this is any pub queuing case, since
> > the duplications occur indefinitely.  Rather it's an issue with
> > having the same 'fd' value registered in the internal data structures
> > multiple times, since it never gets any kind of notification from
> > epoll that the fd has been artificially closed.
> 
> Not even EPOLLERR?

I haven't experimented directly, but the documentation indicates that it just gets cleaned up.  There was some mildly related discussion on this point here: http://lwn.net/Articles/430793/

I haven't banged together a test case, but if it is generating an EPOLLERR, then 0mq surely isn't cleaning up the lingering reference internally.

Cheers,
--B