How to fix when a JNI error has occurred in Minecraft

If you’re playing the Java version of Minecraft, you may see the following message when trying to start the game or connect to a server:

  • Error: A JNI error has occurred, please check your installation and try again.

Here’s what to do when you see “A JNI error has occurred” in Minecraft.

The information in this article applies to the Java edition of Minecraft for Windows, Mac, and Linux.

What causes the JNI error in Minecraft?

JNI errors, or Java Native Interface errors, occur when there is a conflict between your version of Minecraft and the Java libraries on your computer. This usually boils down to a couple of potential issues:

  • Your Java version is out of date
  • Java installation file path is corrupted

Since all new versions of Java are backward compatible, upgrading to the latest version should allow you to run any Java version of Minecraft.

How to fix a JNI error in Minecraft

Try these steps in order until Minecraft starts normally:

  1. Download and install the Java updates. Some versions of Windows and macOS have a Java Control Panel that helps you update Java. Otherwise, go to the Java download page, choose your operating system, and get the latest Java Development Kit (JDK) installer. Open the installation file and follow the instructions.

    If you are on Windows, download the .exe file.

  2. Update Java in the Linux terminal. If you’re on Linux, open Terminal and enter the following command:

    sudo apt-get update


    Next, enter the install command, replacing the number “18” with the number of the latest version of Java:

    sudo apt install openjdk-18-jdk


    When the update is successful, try launching Minecraft again.

    Do a Google search for “latest Java version” to check the current version of Java.

  3. Reset the Java installation file path. Even if you have the latest Java updates, the program might be checking for the wrong file path. This is a problem that normally only occurs on Windows.

    When you get to the Edit System Variables screen, choose any path file that includes “Java” and select Erase. Reinstall Java and restart your computer, then try opening Minecraft again.

Frequently asked questions

  • How do I fix the Minecraft OpenGL error?

    The OpenGL error is a graphics error, so update your graphics card driver and disable graphics enhancements. If you still have problems, try disabling any modifications and updating Java.

  • How do I fix Minecraft error code 0x803f8001?

    Sign out of your Microsoft account and sign back in, then check your date and time settings, update Windows, and restart your PC. If you still see error code 0x803f8001, reset the Microsoft Store cache, reinstall Minecraft Launcher, and reinstall Microsoft Gaming Services.

  • How do I fix minecraft error code 0?

    Exit 0 error in Minecraft is caused by incompatible mods. Disable the mods one by one to determine which one is causing the error.

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