I'm getting this runtime error after migrating to from 1.4.1 to 1.4.2: ```java.lang.IllegalStateExce...

# ktor

[Robert Jaros]

I'm getting this runtime error after migrating to from 1.4.1 to 1.4.2:

java.lang.IllegalStateException: Using blocking primitives on this dispatcher is not allowed. Consider using async channel instead or use blocking primitives in withContext(<http://Dispatchers.IO|Dispatchers.IO>) instead.

It looks like it has something to do with Jackson. Is this a known issue?

[Robert Jaros]

The only thing I see in the changelog for 1.4.2 is this:
https://youtrack.jetbrains.com/issue/KTOR-1186

[Robert Jaros]

Found this issue:
https://youtrack.jetbrains.com/issue/KTOR-1286

[Wilfred]

i also faced this issue
i had to downgrade back to 1.4.0