Thanks for the suggestion Joshua. Unfortunately this doesn't fix the problem.
(I restricted the publisher to the one interface in order to avoid any possible confusion due to potential routing through some other interface)
However to add to the information - the SUB on box B can successfully connect to and receive data from any valid interface (wlan0, localhost, eth0) when the PUB binds to *.
Cheers,
Mark
From: Joshua Foster <[email protected]>
To: Mark Sutheran <[email protected]>; ZeroMQ development list <[email protected]>
Sent: Saturday, 7 July 2012, 22:14
Subject: Re: [zeromq-dev] Asymmetrical PUB-SUB problem
Try binding to * on box b
when publishing.
Joshua
Joshua
I'm having a strange asymmetrical problem with tcp PUB/SUB between two boxes - it appears to fail one way.Details:* zeromq version: 3.2, using the Java wrapper.* Scenario has two machines A (Ubuntu, x64) and B (Angstrom, arm8)* Both connected directly via wireless interface (B is acting as AP).Scenario 1: A->B. All as expected.* Box A:PUB bind wlan0 - publish messages 1x per second.* Box A:SUB connect <ipx> - see messages, yay!* Box B:SUB connect <ipx> - see messages, yay!Scenario 2: B->A. Problem* Box B:PUB bind wlan0 - publish messages 1x per second.* Box B:SUB connect <ipy> - see messages, yay!* Box A:SUB connect <ipx> - no messages, boo!However, if I change pattern...Scenario 3: Comparison* Box A: REQ - make n requests.* Box B: REP - send n replies. Replies received on Machine A as expected. Yay.There are absolutely no messages received at the SUB on A from the PUB on B (irrespective of the process start order) however, connecting a SUB on B to the interface's ip works fine. If I reverse the boxes I see the behaviour I expect - i.e. the SUBs on both boxes see the messages. As a contrast: if I run a REQ on A and REP on B, everything works as expected and the message sent from B is received at A.This is presumably a problem with my hardware/OS but I'm not sure even where to start looking... any pointers would be greatly appreciated.Cheers,Mark_______________________________________________
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