[zeromq-dev] random missed messages with epgm pub/sub

Bart van Wissen bart.wissen at speakap.nl
Mon Jan 18 10:27:34 CET 2016

2016-01-15 18:45 GMT+01:00 Steven McCoy <steven.mccoy at miru.hk>:
> On 12 January 2016 at 08:27, Bart van Wissen <bart.wissen at speakap.nl>
>> Our observations:
>> - For random topics, random messages are not received by the subscriber
> This is an inherit problem if the senders are short lived, the only
solution is to add a broker that can maintain a longer lifetime to ensure
delivery.  If you add brokers you may not need multicast at all.

Isn't that what the 'linger' option is supposed to solve? We set that to 3
seconds on the sender. Is it still possible the subscriber is requesting a
retransmit after the sender has already terminated?
Remember that we are actually seeing the packets in tcpdump on the
receiving host. That lead us to assume that it's unlikely that retransmits
are needed. Are we wrong to assume that?
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