Windows Installation: Coursier hangs after downloading all Maven files, Kernel does not install

[RaSi96]

Greetings everyone,

I was trying to install Almond on Windows this time and ran into the following issue: after using BITSADMIN to download the required Coursier files and running .\coursier launch --fork almond -M almond.ScalaKernel -- --install, the 58 missing packages are successfully downloaded but the kernel itself doesn't seem to install. Instead, the installation seemingly hangs with no output. If I Ctrl+C the activity, I'm met with the following error:

I've done the following:

• installed Java 8 for Windows from Java's website and set JAVA_HOME
• downloaded and extracted spark-3.3.1-bin-hadoop3-scala2.13 from Apache's repository and set SPARK_HOME
• used BITSADMIN via CMD to download the Coursier files
• used Coursier Launch to attempt to install the kernel and kernelspec.

This issue also occurs after I reboot my system and try to install the kernel fresh after startup. I've let the batch job run for 5 minutes to 1.5h with no progress. I have also tried running the command with --scala 2.13.8. Should I have Scala installed separately on my system?

As an aside and interestingly enough, the BITSADMIN commands only work via CMD and not Powershell; the latter returns a 0x80070057 error which looking up doesn't seem to help.

Any help would be greatly appreciated!

[RaSi96]

I'm not familiar with Java at all, but I tried to look into this a little more today and from what I could gather, it seems to be a concurrency issue. Resource Monitor shows the only user of the file coursier-launch-1671778752678591189.jar from the image is Java. Thinking maybe this might be solved by a more recent version of Java, I tried installing Almond from scratch with the Java SE Development Kit 19.0.1, which also didn't work and gave me the same issue:

After I Ctrl+C:

After I reinstalled the JDK I deleted the Coursier folder from %APPDATA% and re-ran the Windows commands from Almond's installation guide. Any ideas on how might I work around this issue?

[jacktlange]

I am having the same issue, were you able to resolve or work around this? Thanks! @RaSi96

[RaSi96]

Hi @jacktlange, my apologies but I never really found a solution to this problem. I tried mixing and matching multiple different versions of Java, Scala and Spark and retrying the installation, but it didn't seem to work on Windows. On Arch Linux too I had limited functionality with Almond and the latest versions of Spark/Scala (#929) the last time I tried, though the process is a lot easier with Linux.

I wish I could be of more assistance to you, but as of now my workflow (fortunately) doesn't require the use of a Java/Spark/Scala pipeline; I'll leave this issue open though for future discussion.