Can topics messages get silently dropped?

asked 2017-01-26 13:27:12 -0500

GlenH gravatar image

updated 2017-01-26 13:27:29 -0500

I'm trying to single-step gazebo from an outside application by issuing periodic world control messages.

About 4% of them appear to be ignored, not sent, or not received. Why? Aren't topics based on TCP sockets, which guarantee that no data gets lost?

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Messages should be dropped if they are sent when both the publisher and the subscriber are ready.

hugomatic gravatar imagehugomatic ( 2017-01-26 16:17:41 -0500 )edit

Err... is this some new meaning of the word "ready" that I was not previously familiar with? Seems like if both the publisher and subscriber are ready, there should be some sort of presumption, if not a formal guarantee, that the traffic will go through. Under what conditions, specifically, are messages dropped on the floor? Is there any way to query whether this has happened?

GlenH gravatar imageGlenH ( 2017-01-27 14:17:59 -0500 )edit