hi i am using IntelliJ I have a `fun main ` function that I

Question

hi i am using IntelliJ I have a `fun main ` function that I execute when I execute the main function the program runs but I know there are exceptions being thrown by my code but none get outputted to my console How can I setup logging so that I can see the logs in the console

fred.deschenes · Answer

Well it depends on where those exceptions are thrown and what logging framework you use

edhu · Answer

Hi i m using `io github microutils kotlin logging 1 4 9` if i log statements in my project it works but the exceptions being thrown from a Jar dependency that i call do not get shown in the console

edhu · Answer

all i see is `Process finished with exit code 0`

fred.deschenes · Answer

you ll have to check what logging framework this dependency uses and probably change some configs on your side to have their loggers show up in your log files IDE I ve never used kotlin logging so I don t really know how it works

fred.deschenes · Answer

what s your dependency that s throwing the exception

edhu · Answer

my own jar file

edhu · Answer

in my own jar file i added `compile org slf4j slf4j api 1 7 10 `

edhu · Answer

i read that for libraries i only have to add that dependency

fred.deschenes · Answer

yeah but you still have to log whatever you want logged yourself

edhu · Answer

the exception not being logged is a NPE because some models are not marked as nullable

edhu · Answer

i m an Android developer and I m used to every error is shown in the console

edhu · Answer

i guess it is a system exception Kotlin telling me a property is not set as nullable

fred.deschenes · Answer

yeah NPEs are RuntimeExceptions

edhu · Answer

what can i do to show all these errors in the console

fred.deschenes · Answer

either way you won t see exceptions show up in the console if they aren t 1 thrown in the main thread 2 explicitly logged in some logging framework

fred.deschenes · Answer

so you d have to get a logger from SLF4J wrap whatever is throwing your exception in a try catch and do `logger error ` with your caught exception

edhu · Answer

ok so i run the code and on a breakpoint before the NPE i can see ForkJoinPool commonPool worker 1 in group main RUNNING

edhu · Answer

so it is in the main thread

edhu · Answer

i just wrapped the call in a try catch but nothing is shown

fred.deschenes · Answer

if your thread name is ForkJoinPool commonPool worker 1 you re definitely not in the main thread

fred.deschenes · Answer

either way I suggest you read a bit on how SLF4J works as you ll have other stuff to setup to make sure your logs are displayed correctly if at all <https www slf4j org docs html>

edhu · Answer

ok thanks

edhu · Answer

removed the code from the background thread and now i m seeing what i expected

edhu · Answer

indeed it was not in the main thread

fred.deschenes · Answer

yeah that s what I figured wink

fred.deschenes · Answer

and don t worry no one understands the Java logging frameworks at first still not sure I really understand either gt gt

dave08 · Answer

Use `runBlocking` and `await` or `join` CommonPool is the default thread pool dispatcher in coroutines you need to wait for the result to come back from the thread

edhu · Answer

< dave08> thanks did that and it also works