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by macintux
3024 days ago
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OTP offers two basic messaging options: async or synchronous. The latter is implemented by forcing the caller to wait for the response. If process A sends a synchronous message to B, and B while processing it sends a different synchronous message either directly to A or to another process that eventually calls back to A, you end up in a deadlocked state. |
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with synchronous messaging it is quite easy to see how deadlocks can happen, without trying too hard. for async messaging, which is what i was referring to, it is quite hard (and or convoluted) to get into that state...