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A JNI Error Has Occurred in Minecraft

How to Resolve it?

A JNI Error Has Occurred in Minecraft

You may already be aware of this, but the Minecraft Java Edition is the most advanced version of the game. In the Java version, you can personalize, upgrade, and modify it using the best Minecraft mods according to your preferences. You can do all of this whether you are playing offline or online. You may have got an error stating “A JNI Error Has Occurred in Minecraft.” In this article, we’ll fix that for you!

On the other hand, this opens it up to a wide variety of different types of errors. The JNI errors are one of the most widespread and disastrous programming errors. This Java error, prevents players from being able to play Minecraft. But, it can be quickly and easily resolved by applying a couple of straightforward fixes. So let’s find out what it means when you get the message “A JNI error has occurred” in Minecraft, shall we?

What Is a JNI Error?

What Is a JNI Error?
What Is a JNI Error?

JNI stands for Java Native Interface. Because this is a Java Native Interface error, the program is attempting to load a native library. 

Minecraft players could obtain the game’s most recent version on June 7, 2022.

It was a huge letdown to some users that they could not access the updated sandbox world. This was due to an unexpected JNI error – “A Java Exception has occurred.”

Many users were excited to enter the updated sandbox world. However, others were extremely dissatisfied that they could not do so. The Minecraft version 1.17 is when this behavior first appeared.

After attempting to start the game using the launcher, the error occurs, as stated by a significant number of user reports. It is rather strange, considering that the message indicates that either the correct or missing version of Java is not present. For example, many players who encountered the error stated that they already had Java installed on their respective computers.

Technical reports suggest that the issue lies within the version of Java used by Minecraft. However, the game’s most recent patch upgraded it to use Java 16. Minecraft’s developer, Mojang Studios, claims that the issue occurs when users try to begin the application or the client (.jar) without Java 16 loaded.

Users have run into problems in the past because most people use the Java version of the game.

Therefore, ensuring you are using the most recent version of Java should help you fix this. 

Why Has JNI Error Occurred?

We’ve provided an exhaustive list of possible reasons for the error message below:

Outdated Java JDK Version: Whether you encounter this issue when attempting to open Minecraft build 1.17 or a later build doesn’t matter. You first need to verify and see if your computer’s Java 16 JDK package is present. If it is not, you will need to reinstall it. When Minecraft starts on a personal computer, this issue is the most common cause of the error that appears. For example, suppose you did not include the Java 17 JDK in the installation of your computer. This means that you’ll have to get it from the proper sources and set it up yourself.

Broken Java Variable: A faulty Java system variable path is also a possible circumstance in which this error may display, as explained below: This leads the Minecraft launcher to believe that Java is not present on your computer, even though it is present on your computer. So suppose the preceding scenario applies to your situation. To fix the issue, you may remove the incorrect system PATH from the configuration files. This step is only necessary if the preceding scenario is applicable.

How to Resolve JNI Error?

How to Resolve JNI Error?
How to Resolve JNI Error?

Now, we’ll see how to fix this error.

Install the Latest Java JDK Version

On a desktop lacking Java 16 or higher, you may often receive this error while attempting to run Minecraft. This is the situation the computer documents the most. To play Minecraft after the 1.17 update, you must install the Java Development Kit (JDK) version 16 on your PC. Not doing so will cause the game to fail to start.

Clean The Broken System Path Variable

Check whether one of the JAVA control parameters is faulty if the first technique didn’t work for you.

Even if you did install Java JDK, your Minecraft client may mistakenly believe that you don’t have it because of a broken parameter.

In this particular scenario, You can fix the problem by going into the System Properties screen and modifying the Environment variables so that you remove the Java PATH environment. You’ll solve the issue by doing so.

Gamers who were encountering the error notice when trying to start Minecraft using a client made just for that purpose found this workaround to be very helpful.

What Version of Java Is Needed for Minecraft 1.17 Server?

What Version of Java Is Needed for Minecraft 1.17 Server?
What Version of Java Is Needed for Minecraft 1.17 Server?

JRE version 16 and a Java runtime environment (JRE) with version 8 or later. 

The requirements might shift if you change the server software (like the operating system), for example, if you use Bukkit or mods.

Since JDK already includes JRE, this will also work. Beginning with version 1.17, you must install JRE version 16. However, you require version 17 of the JRE for the installation of Minecraft version 1.18.


At least one gigabyte of random access memory (RAM) is set aside for the server to use (-Xmn 128M -Xmx 1G).

Suppose you are running Windows or a desktop-based distribution of Linux. In that case, we recommend that you have at least one gigabyte (GB) of additional physical RAM installed on your computer. This will prevent the graphics on your desktop from becoming sluggish. Calculating the exact amount of RAM necessary might be tricky. Many variables must be taken into account, such as the amount of people presently connecting to your server and the manner in which they interact with the real-world setting.

Even though a player object only needs about 50 to 100 megabytes of random access memory (RAM), the server frequently needs to allocate much more memory per player for various reasons.

You may or may not be able to set a “softmax RAM” amount for the server JAR program, depending on the particular version of Java that you are using. As much as possible, the JDK will use less memory than the softmax. However, if this is impossible, it will permit memory usage to increase beyond the softmax.


Although the server (as of version 1.17) may use additional cores for various operations, the maximum number of cores that Minecraft typically uses is three.

When a CPU delivers two threads or virtual cores for every mechanical core, it is referred to as hyperthreading (HT) or simultaneous multithreading (SMT). However, this doesn’t seem to have a big impact on Minecraft’s functionality. If you have the option switched on, your CPU may perform some more stuff on the side, as long as you have it switched on. 

Extra work (from plugins) consumes additional cores while using third-party applications. However, the core world mechanics (ticking, etc.) remain the same. This is even though the plugins do use additional cores. For example, Akarin is one of the characters working on multithreading the game’s core mechanics. However, players should be aware that this is very difficult work since it is prone to introducing bugs.

What Version of Java Does Minecraft 1.18 Use?

What Version of Java Does Minecraft 1.18 Use?
What Version of Java Does Minecraft 1.18 Use?


The latest version of Java includes significant enhancements that help improve the speed, reliability, and safety of the Java applications that run on your computer. Installing the most recent update for Java ensures that Minecraft will continue to run without incident and in an efficient manner.

Based upon what version of Minecraft you’re using, you’ll need a different Java requirement.

  • Minecraft demands Java 8 (1.8.0) or a later version to run, beginning with Java Edition 1.12 (17w13a) and continuing through Java Edition 1.16.5 (1.17: 21w18a).
  • Minecraft demands Java 16 or a later version or higher to run from Java Edition 1.17(21w19a) to Java Edition 1.17.1(1.18: 1.18 Pre-release 1).
  • From version 1.18 of the Java Edition (1.18 Pre-release 2), Minecraft needs Java 17 or later.

If you are not using a relatively recent version of Java, there is a chance that Minecraft will crash occasionally.

Java updates address various issues and errors and typically result in performance enhancements.

For instance, more recent heap collectors may be able to mitigate lag spikes that occur during heavy memory utilization.

Java must be manually installed on your computer if you want to run a server rather than using the pre-installed version.

Final Words – A JNI Error Has Occurred in Minecraft

Minecraft often receives significant upgrades that provide a great deal of variety into the gameplay experience. The players are highly excited to play Minecraft due to the recent addition of newer Mobs, new Blocks, and Ores, as well as a significant alteration in World Generation. Despite this, a specific issue has arisen that players must deal with. Since the 1.17 Minecraft release, a significant number of users have been confronted with a JNI Server Error.

It seems that there is a difference between the versions of Java that are being used, and if you follow these procedures, the game should begin to operate normally. Downloading and setting up versions of Java 16 and later is a very straightforward procedure. It is recommended that you always use the latest Java version on your computer.

This was a complete guide on a JNI error has occurred Minecraft!

Read Also: How To Summon a Patrol in Minecraft?


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