Solutions to problems with Java Development

I recently ran into some problems with java development. One problem was neovim specific but the other was an issue with gradle. I wanted to document these in case any one else has similar problems as it took me a little bit of time to figure out.

Problem 1: jdtls exiting with status code 13

I use jdtls through Mason with the built in nvim LSP and was recently having an issue where jdtls would immediately crash when opening a file. The solution to this problem was just deleting the cache for jdtls:

rm ~/.cache/jdtls

Edit 05/14/2024: This also solves the problem of jdtls not attaching on neovim startup. May solve other problems as well, so should be first thing to try if jdtls isn’t working.

Problem 2: Could not set executable permissions for .gradle

When attempting to build with a gradlew script I was running into the following error:

Could not set executable permissions for: ~/.gradle/wrapper/dists/gradle-7.6-bin/9l9tetv7ltxvx3i8an4pb86ye/gradle-7.6/bin/gradle

After spending some time trying to find a solution, I found a suggestion of setting an environment variable:

 export JAVA_TOOL_OPTIONS="-Djdk.lang.Process.launchMechanism=vfork"

The above environment variable was all I needed and the gradle script was able to assemble the project successfully. Hopefully this is helpful to someone!