Could not reserve enough space for 2097152kb object heap как исправить

In this post, we will see an error(Could not reserve enough space for 2097152kb object heap object heap) which you might have encountered while dealing with JVM.We will see how can we fix this issue.

error occurred during initialization of vm could not reserve enough space for 2097152kb object heap is generally raised when Java process can not create java virtual machine due to memory limitations.

Before we go through causes and fixes for this issue, let’s go through few basic things.

Heap size

Heap size is memory allocation space for storing java objects at run time. This heap size can have minimum and maxiumn heap size. You can specify minimum and maximum size using Xmx and Xms VM arguments.

Maximum heap size

The maximum possible heap size can be determined by available memory space. It is different on 32 bit and 64 bit as follows.

1. 2^32 (~4GB) on 32 bit JVM
2. 2^64 (~16EB) on 64 bit JVM.

In general, you will get 1.4-1.6 GB on 32 bit windows and approximately 3GB on on 32 bit linux.

If you require large heap, then you should generally use 64 bit JVM.

Cause 1: Did not specify heap size

Let’s say you run your java program without specifying any heap size and you get below error.

Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

You will get this error more often in 32 bit JVM rather than 64-bit JVM

Reason
32-bit Java requires contiguous free space in memory to run. If you specify a large heap size, there may not be so much contiguous free space in memory even if you have much more free space available than necessary.
Installing 64-bit version might solve this issue in this case.

Fix 1

You can fix this error by running Java with lower heap size such as -Xmx512m.

Cause 2: Too large Xmx value

If you specify too large memory with -Xmx option on 32 bit VM, you may also get this error.
For example:
Let’s say you are getting an error with below execution.

Fix 2

You might not have enough contiguous free space in memory.You can run the application with slightly lower heap size to resolve the issue.

Cause 3: Specifying large heap size more than physical memory

If you specify large heap size more than physical memory available on 64-bit or 32-bit  machine, you will get this error.
For example:
Let’s say You have 3 GB RAM on your machine and you are executing below command, you will get this error.

Fix 3

You can run the application with heap size which is less than your physical memory.

Sometimes above solutions might not work.

Set _JAVA_OPTIONS environment variable

So you can set _JAVA_OPTIONS as the environment variable.

In Linux

-bash-3.2$ export _JAVA_OPTIONS =»-Xmx512M»
-bash-3.2$ javac MyApp.java

In Window

Go to Start->Control Panel->System->Advanced(tab)->Environment Variables->System
Variables->New: Variable name: _JAVA_OPTIONS
Variable value: -Xmx512M

💡 Did you know?

JDK_JAVA_OPTIONS is prefered environment variable from Java 9+ onward to specify Java options. It will be ignored in the version lesser than Java 9.

You might get an specific error Could not reserve enough space for 2097152kb object heap in case you are using any tool. It simply means that JVM is not able to acquire 2 GB heap space which is required by the tool by default.

Apache cordova

Apache Cordova is a mobile application development framework originally created by Nitobi.
If you are getting this error on Apache cordova, here are solutions.

1. Switch from 32 bit JVM to 64 bit JVM
2. set _JAVA_OPTIONS environment variable with -Xmx512M
3. Change

   args.push(‘-Dorg.gradle.jvmargs=-Xmx2048m’) to   args.push(‘-Dorg.gradle.jvmargs=-Xmx1024m’);

   on the following files located on your machine.

   project-folderplatformsandroidcordovalibbuildersbuilders.js
   project-folderplatformsandroidcordovalibbuildersGradleBuilder.js
   project-folderplatformsandroidcordovalibbuildersStudioBuilder.js

Minecraft

If you are getting this error, while launching Minecraft game, then you need to switch from 32 bit JVM to 64 bit JVM.

Jfrog artifactory

If you are using JFrom artifactory as artifact life-cycle management tool and getting Could not reserve enough space for 2097152kb object heap while launching it.
Go to bin directory of your JFrog Artifactory installation, change following line in arifactory.bat file.

This should resolve this error for JFrog Artifactory installation.

Conclusion

• If you might have installed 32 bit JVM in 64 bit machine.Upon uninstalling that version and installing 64 bit version of Java
• You might have provided too large heap size which might be greater than physical memory. In this case, you need to reduce heap size of JVM.
• If above solution does not work, you can set JAVA_OPTS as the environment variable to solve this issue. If you set JAVA_OPTS environment variable, then each JVM initialization will automatically use configuration from this environment variable

I hope this will resolve your issue with error occurred during initialization of vm could not reserve enough space for 2097152kb object heap.

It is always beneficial to add more RAM to your Minecraft server. However, at times while adding more RAM or allocating more space, you may encounter the could not reserve enough space for object heap. This error can occur due to incorrect version of Java JRE.

Several users have reported similar errors in the Reddit community forum.

I hope this is the right sub-reddit anyway, i am making a survival server with my friends and when i add more ram i am getting this error
C:UsersmeandDesktopServer>java -Xmx2048M -Xms2048M -jar server.jar nogui
Error occurred during initialization of VM

Could not reserve enough space for 2097152KB object heap
C:UsersmeandDesktopServer>PAUSE
Press any key to continue . . .

If you are also troubled by this error, here are a couple of troubleshooting tips to help you resolve the Minecraft server could not reserve enough space issues in Windows.

How do I fix the could not reserve enough space Minecraft error?

1. Install 64-bit Java JRE

1. Go to the Java JRE download page.
2. Click on Windows Offline (64-bit). Wait for the download to complete.
3. Double-click on the Java installer to install the 64-bit edition of the Java runtime environment.
4. Launch your Minecraft server and try to allocate more RAM to the server.
5. Check if the could not reserve enough space error is resolved.

If the issue persists even after installing the 64-bit version of Java JRE, follow these steps.

1. Press Windows Key + R to open Run.
2. Type cmd and click OK to open Command Prompt.
   
   
3. In Command Prompt, type the following command and click OK:
   java -version 
4. The above command will display the Java version installed on your computer. The result will look something like this:
   C:>java -version
java version "1.8.0_221"
Java(TM) SE Runtime Environment (build 1.8.0_221-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)
5. If it doesn’t say “64-bit Server VM”, it means Minecraft is still finding the 32-bit version.
6. To fix this, you need to remove the older version and reinstall the 64-bit edition again.

Remove and reinstall 64-bit Java JRE

1. Press Windows Key + R.
2. Type appwiz.cpl and click OK to open Control Panel.
3. Choose the 32-bit edition of Java and click on Uninstall.
4. Also, uninstall Java JRE 64-bit edition.
5. Once done, install the 64-bit Java JRE downloaded in the first step.
6. Try allocating more space to your Minecraft server and check for any improvements.

2. Add a new system variable

Note: Before proceeding with the below steps, create a system restore point.

1. Press Windows Key + R to open Run.
2. Type control and click OK to open Control Panel.
3. Go to System and Security > System.
   
4. Click on View advanced system settings from the left pane.
5. In the System Properties window, click on the Environmental Variables button.
   
6. Under the System Variables section, click the New button.
   
7. Enter the following for Variable name and value:
   Variable name: _JAVA_OPTIONS
   Variable value: –Xmx512M
8. Click OK to save the changes.
9. Click OK on all the open Windows.

The above process will set the memory size to 512MB and fix the could not reserve enough space Minecraft server error.

The Minecraft server could not reserve enough space error can be resolved by installing the 64-bit edition of Java JRE. Since the 32-bit edition is limited on the memory front, installing the 64-bit edition of Java will remove the limitation.

However, if the error occurs without making any changes, try limiting the memory allocation to 512MB by adding a new system variable in Control Panel.

3. Try another Minecraft server alternative

One of the key aspects of running a server is RAM. If you don’t have enough RAM, you won’t be able to run the server without lags.

With Minecraft Server Hosting, you can upgrade or downgrade your RAM wherever you want to ensure you get the correct balance you need. The first step in creating a server is to know what server plan to choose.

RAM is required by the server to support all of the connected players and run all of the software. The player amount, type of plugins, or mods will affect the amount of ram you will need on your server. That’s why with considerable RAM you can do more with your server.

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