Ubuntu.my.id

"Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar" when starting the Scala interpreter

Posted on Sep 5, 2022

Question

When running the Scala interpreter in Ubuntu 14.04, I get the following message printed as the first line:

Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar

Followed by the familiar "Welcome to Scala" message.

I'm worried because I haven't seen that when running Scala before - what does it mean, is it dangerous, etc?

Apparently the environment variable $JAVA_TOOL_OPTIONS is set to -javaagent:/usr/share/java/jayatanaag.jar - I didn't set that, but what did and why? Can I safely unset it?

Additional info:

  • recently installed Android Studio
  • The word "ayatana" in the JAR's name might point to Ubuntu's project Ayatana

Answer

You can disable jayatana just for the current shell session by unsetting JAVA_TOOL_OPTIONS like so:

unset JAVA_TOOL_OPTIONS

That way it will still be enabled for applications needing it.