in Datalore is there a way to add the

--add-opens=java.base/java.nio=ALL-UNNAMED

for Arrow support?

There is an instruction in the notebook to add jvm args, but I always forget how it is done...

like a Kotlin demo notebook? I have been looking through the documentation but might have missed the example notebook that had it

I am trying to find it. For some reason it is undocummented.

thanks. I was looking at that a bit. Is the default kernel in DataLore known/discoverable? To make it as similar as possible. I guess I can create a new one from the terminal but not sure how to activate it. I think I saw something about

init.sh

last night. Need to find that again

Probably not. You have access to the terminal so you can proably change configuraion manually through terminal...

Hi! You need to add KERNEL_JAVA_OPTS environment variable with the value

--add-opens=java.base/java.nio=ALL-UNNAMED

to your environment https://github.com/Kotlin/kotlin-jupyter/blob/master/distrib/run_kotlin_kernel/run_kernel.py#L68

in DataLore is that a secret? Or is there another way to set them?

Yes, it's a secret https://www.jetbrains.com/help/datalore/dl-create-a-secret.html

I got it working with

KOTLIN_JUPYTER_JAVA_OPTS_EXTRA

. I restarted the machine and verified the

KERNEL_JAVA_OPTS

was in the /proc/{pid}/environ for both the java kernel process and its parent but it didn't modify the java command. I tried these first,

KERNEL_JAVA_OPTS

,

KERNEL_EXTRA_JAVA_OPTS

,

KOTLIN_JUPYTER_JAVA_OPTS

(this one is overwritten) But this one works

KOTLIN_JUPYTER_JAVA_OPTS_EXTRA

@Ilya Muradyan I think it is worth mentioning this problem to DataLore team. Each notebook has an

environment

file. Maybe jvm keys should go there.

I asked them explicitly, they say it's the only way for now