I'm running into an issue where gradle (6.7.1) is getting stuck while building my kotlin 1.4.20 proj...

# gradle

[tim]

I'm running into an issue where gradle (6.7.1) is getting stuck while building my kotlin 1.4.20 project. I've tried deleting ~/.gradle and project/.gradle folders but the issue seems to persist. Its getting stuck during some kapt dependent tasks which get called from gradle :core:classes Anyone else experiencing similar?

[eskatos]

If the Gradle daemon is stuck, then a thread dump would help understand what is happening

[eskatos]

See https://www.baeldung.com/java-thread-dump

[tim]

Posted the dump here: https://pastebin.com/gevDwqFV

[eskatos]

This looks like a thread dump from the command line client. not the Gradle daemon

[eskatos]

user@host $ jps | grep Gradle
302357 GradleDaemon
302323 GradleWrapperMain

The above shows two Gradle processes, you need a thread dump of the GradleDaemon one

[tim]

ahh k sorry

[eskatos]

I'm leaving the keyboard, if you don't see anything obvious in the thread dump you might want to open an issue on gradle/gradle with the thread dump attached and as much detail as you can about your build.

[tim]

okay thank for the help

[tim]

will try and get the dump from GradleDaemon. Currently kill -3 PID doesn't dump to std out so will inestigate some of the other methods referrend to above

[eskatos]

Yes, daemon stdout is redirected to the logs. Better make it dump to a file it'll be easier

[tim]

👍 i've got it with jstack will review it shorlty

[tim]

https://pastebin.com/SfnFZcyL

[tim]

will review it shortly to see if anything jumps out

[tim]

yep gibberish to me 🙂 I will try and recreate in a fresh repo and if its still failing then i'll create an issue on githib

[eskatos]

You could also give 6.8-rc-1 a try

[tim]

I've tried with gradle 6.6 and jdk 13 but no go. Also tried building inside a docker container again no go.

I think the issue might be something Arrow is doing. but still trying to narrow it down to exactly what. So not sure if its gradle or arrow at the moment

[tim]

Same issue on 6.8-rc-1 ... still trying to figure our which bit of code actually causes the error. Been removing a folder at a time to find the point at which it compiles 😩

[tim]

I think I've found the issue! There is a data class in my code that has an error in it - its using a type that isn't available and its using Arrow's @optics annotation.

If i remove the @optics annotation then gradle spits out the error from during compileKotlin task and exits. If I fix the missing type, then it compiles correctly.

[tim]

I'm not sure if this is a gradle, kapt, or arrow issue?

[eskatos]

Given the symptoms I would start by reporting that at the Kotlin issue tracker. Ideally you can reproduce that in a small shareable build.

[eskatos]

https://kotl.in/issue

[tim]

👍