Fix: ‘A JNI Server Error Has Occurred’ in Minecraft


An error has been pestering many players since the 1.17 Minecraft update, the JNI Server Error in Minecraft. In this guide, I will explain how to fix the JNI Server Error in Minecraft.

JNI Server Error on Minecraft

What is the JNI Server Error?

The JNI Server Error in Minecraft happens when a JDK or JRE is missing or is not able to load. This usually is not the case for Minecraft. In Minecraft for this error to occur there might be possible two reasons.

One is that Previous versions of Minecraft came with server software that was compatible with older versions of Java. However, this is not the case with the latest Minecraft update, which now requires Java to get up and running properly.

This can also happen due to a corrupted pathway for Java which tricks the launcher into thinking that you do not have Java installed on your PC.

Whatever the cause of this problem, the solutions below will help you fix it in no time.

Fix the JNI Server Error in Minecraft

Now we will see what methods can we apply to get this error fixed on Minecraft. Let’s see if any of these solutions work for you.

Install the latest Java JDK version

In most cases, the JNI Server error in Minecraft usually arises when you do not have the JAVA 16 or later version installed on your PC. Keep in mind that starting with Minecraft build 21w19, you will need to have Java’s 16 JDK version installed on your PC, otherwise, the game will not launch.

To fix this you will just need to update your Java JDK version to the latest version available using the official source available to you. First thing is first, your Minecraft launcher should be completely closed before we move onto the next step

  • Open your browser on the PC and you can follow this LINK to get the latest java version on your PC.

Wait for the download to finish before unpacking the zip archive with WinZip, WinRar, 7Zip, or the built-in equivalent and waiting for the operation to finish. Once the extraction is complete, navigate to the location where the JDK was extracted and copy it to your clipboard by right-clicking on it and selecting Copy from the context menu.

Next, navigate to the following location in File Explorer (My Computer) and paste the JDK 16 folder that you previously copied: Close the window and double-click your Minecraft launcher again once the copying process is complete (TLauncher or other).

Once inside the launcher, click on the settings icon, then Settings from the context menu.

Make sure Minecraft Settings is selected at the top of the Settings menu, then click the Browse button associated with Java path.
Next, navigate to the following location using the browse window:
Javajdk-16.0.2bin C:Program FilesJavajdk-16.0.2bin

Before clicking the Open button, ensure that javaw.exe is selected. Finally, press the Save button to save the java path in your Minecraft launcher. Restart the game normally, and the problem should be resolved.

Remove Broken System Path Variables for Java

If the first method doesn’t work, then this “a JNI error has occurred Minecraft” error is due to a corrupted system path variable for Java.

In this case, you can fix the problem by visiting the System Properties screen and modifying the environment variables in a way that removes the Java environment variables.

  • Open the run dialog box, to do that you can simply press the Win+R keys together.
  •  Now type sysdm.cpl and click Ok.
  • In the System Properties window, switch to the Advanced tab, and then click on the Environment Variables button.
  • From the System variables, select Path, and click on Edit.
  • Look for the environmental variable of Java, select it, and click on Delete.

Once the variable is deleted, restart your system and run Minecraft. Hopefully, this will do the job for you.

Fix JNI Server Error

Final thoughts

Well, these two methods have proven to be the most effective at solving the JNI error. If any other solution has worked for you please let us know in the comments.

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