Unable to make field private static final java.util.HashMap java.lang.ProcessEnvironment.theEnvironment accessible

Question

When I run sbt, I get the below. I am still able to keep working but the warning/error annoys me and clutters my terminal. Any idea how I resolve this?

java.lang.reflect.InaccessibleObjectException: Unable to make field private static final java.util.HashMap java.lang.ProcessEnvironment.theEnvironment accessible: module java.base does not "opens java.lang" to unnamed module @43016
        at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
        at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
        at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
        at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
        at au.com.onegeek.sbtdotenv.DirtyEnvironmentHack$.$anonfun$setEnv$1(DirtyEnvironmentHack.scala:42)
        at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at scala.util.Try$.apply(Try.scala:213)
        at au.com.onegeek.sbtdotenv.DirtyEnvironmentHack$.setEnv(DirtyEnvironmentHack.scala:38)
        at au.com.onegeek.sbtdotenv.SbtDotenv$.configureEnvironment(SbtDotenv.scala:71)
        at au.com.onegeek.sbtdotenv.SbtDotenv$autoImport$.$anonfun$dotEnv$1(SbtDotenv.scala:42)
        at scala.Function1.$anonfun$compose$1(Function1.scala:49)
        at scala.Function1.$anonfun$compose$1(Function1.scala:49)
        at scala.Function1.$anonfun$compose$1(Function1.scala:49)
        at scala.Function1.$anonfun$compose$1(Function1.scala:49)
        at scala.Function1.$anonfun$compose$1(Function1.scala:49)
        at scala.Function1.$anonfun$compose$1(Function1.scala:49)
        at scala.Function1.$anonfun$compose$1(Function1.scala:49)
        at sbt.Project$.setProject(Project.scala:501)

user_86485 · Answer

The stack trace mentions "au.com.onegeek.sbtdotenv", so apparently this is coming from https://github.com/mefellows/sbt-dotenv.

You could try upgrading to the latest version of that plugin and see if the problem goes away.

If it doesn't, you could report the issue to the maintainer.

In that repo's README, there is a section about similar errors: https://github.com/mefellows/sbt-dotenv#illegal-reflective-access-warnings

It isn't clear to me if that's the same or different.

user_10601812 · Answer

Assuming sbt-dotenv is the culprit, you can try a couple of things:

Create a .jvmopts and place it at the root folder of your project.
Prefix the export keyword in your .env variables.

This should solve the issue

Unable to make field private static final java.util.HashMap java.lang.ProcessEnvironment.theEnvironment accessible

2 Answers