Challenge 3B - crash with "no handler for broadcast"

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Hey friends, I’m running into a weird issue with Challenge 3B. I have code that passes 3A without any problems, but adding additional nodes into the test yields problems where some nodes crash with No handler for {"id":13,"src":"n0","dest":"n1","body":{"src":"c4","dest":"n0","body":{"type":"broadcast","message":0,"msg_id":2}}}

This seems like a race on node n1 startup where n0 is running before n1 has finished setting its message handlers. Anyone else see similar and work past it?

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What’s up with the nested bodies? Could it be the top layer body doesn’t have a message type on it?

1 Like
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Thanks! That got me past a message-formatting bug where I was serializing the whole message as the message body. I changed that up and got farther on the next run before catching a suspiciously similar error.

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Awesome! I’d look carefully at which node is receiving the message, for which specific handler, and being sent by who. I got tripped up on this shape of stuff too.