[zeromq-dev] C# Binding ZMQ 3.2.5: Subscriber stops receiving after random time intervals

Tobias Elbert tobias_elbert at hotmail.com
Thu Mar 26 01:26:35 CET 2015

I have been going through past emails and nothing seems to match my problem exactly. I am using ZeroMQ3.2.5 and C# binding.
I have a pretty simple setup with a single publisher and multiple subscribers. The publisher publishes in regular 5 minute intervals some rather small messages (<100bytes). All subscribers are on a local network - some of which on the same physical machine. My logs indicate that everything seems OK publisher side - the data was sent as expected. The publisher and subscribers run for about 10 hours daily, are then shut down and started again next day.
This works well for hours - often days - until all of a sudden no data arrives subscriber side (at least not in the application layer). I know from my logs and debugging that the data was sent, but the subscribers did not receive it. Often, most subscribers would actually keep receiving the data and only one or two no longer get anything. A restart of the subscriber usually resolves the situation.
Today I had the case where this happened to a subscriber that is located on the same machine as the publisher so no wires in between. 
I was wondering if others have encountered this? In particular the case where both pub/sub are on the same box?
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