How to detect cause of this crash from Crashlytics?

Question

Suddenly my app started to crash enormously. I checked Crashlytics report but it doesn't tell me much. This is what it says, hopefully someone could give me a hint if had same/similar problem..

Answer 1

This seems to be related to a known jmDNS bug that was supposedly fixed a long time ago¹:

• https://sourceforge.net/p/jmdns/bugs/101/
• https://sourceforge.net/p/jmdns/mailman/jmdns-discuss/thread/4EA5B242.4070003@gmail.com/

Apparently, the problem is triggered by lookup of malformed DNS names: see last email in discussion thread.

I suggest that you add some diagnostics to your app to find out what name your code is attempting to lookup.

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^{1 - I have my doubts that it was actually fixed ... based on the discussion thread.}