mbriggs
How to log exception + stacktrace
Really having a hard time finding documentation around exception handling. Given e is the caught exception, I have tried
Logger.error(e), but that gives me ** (Protocol.UndefinedError) protocol String.Chars not implemented
Exception.message(e) gives me the message as a string, but what im looking for is message + formatted stacktrace.
I have seen Exception.format_banner which sounds like what i want, but Im not sure what the first param (kind) refers to
Thanks for the help 
Marked As Solved
kelvinst
You are in the right path with Exception.format_banner/3, but this function does not print the stacktrace. Instead, use Exception.format/3, and you will be good to go.
Now about the kind parameter, is basically one of this 3 options: :error, :throw or :exit. For exceptions catched with try do ... rescue, use the :error kind.
For more detail about it, look at the try, catch and rescue guide.
Also Liked
mike_bianco
I ran into a related problem. I wanted to log an exception with the correct metadata for it to be treated as an exception by error trackers like Sentry.
Here’s the solution I came up with:
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