How to fix a Minecraft server that could not reserve enough space

In this tutorial, we’ll learn the cause of the “Failed to reserve enough space for a pile of objects” error and look at some possible scenarios. Have you encountered an error where Minecraft couldn’t reserve enough space for a pile of objects? How do you fix the “Couldn’t reserve enough space for a pile of objects” error in Minecraft? Well, Techquack is going to give you some methods to fix that Minecraft couldn’t reserve enough space for a pile of objects in this post.

“Failed to reserve enough space for a pile of objects” is a specific JVM error that occurs when a Java process cannot create a virtual machine due to memory limitations on the running system:

java -Xms4G -Xmx4G -jar HelloWorld.jar

An error occurred during the initialization of the VM.
Not enough space can be reserved for a bunch of objects.
Error: Unable to create Java virtual machine.
Error: A fatal exception has occurred. The program terminates.

In general, there are two possible scenarios in which an error occurs.
First, when we run a Java process with a heap size limit parameter (-Xmx) and a value greater than the process can have in the operating system.

The heap size limit varies depending on several constraints:

  • Hardware architecture (32/64 bit)
  • JVM bit version (32/64 bit)
  • Operating system used.

Second, if the Java process cannot allocate the specified amount of memory due to memory consumption by other applications running on the same system. As a result, the Minecraft server is not able to allocate enough memory.

 

What is the reason for the inability of the Minecraft server to reserve enough space

What is the reason for the inability of the Minecraft server to reserve enough space

As everyone knows, Minecraft is a popular sandbox game enjoyed by users all over the world. However, sometimes you may encounter the “Minecraft server could not have enough space for a bunch of objects” error if you allocate more ram to Minecraft. Regardless, it’s a good idea to allocate more RAM to Minecraft.

Tip: Note that in this case we are not talking about RAM, but RAM.

What are the reasons for not being able to reserve enough space for a bunch of Minecraft objects? There are several possible reasons. They are summarized as follows:

  • The Java JRE version is incorrect.
  • You specify a large heap size, but the amount of adjacent free space is insufficient.
  • The heap size is larger than the process can handle.
  • The Java version cannot allocate the specified amount of memory. The Minecraft error could not reserve enough space for the 2097152kb object heap – this is an example.

The above reasons can cause Minecraft to fail to reserve enough space for a pile of objects. Of course, other items can also cause an error. How to solve this problem? Please continue reading the following content.

 

How to fix a Minecraft server that couldn’t reserve enough space for a pile of objects

How to fix a Minecraft server that couldn't reserve enough space for a pile of objects

Install Java JRE 64 bit

  1. Go to the Java JRE download page.
  2. Click on Windows Offline (64-bit). Wait for the download.
  3. Double-click the Java installer to install the 64-bit version of the Java Runtime Environment.
  4. Start the Minecraft server and try to allocate more RAM to the server.
  5. Check to see if the insufficient memory allocation bug is fixed.

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

  1. Press Windows + R to open Run.
  2. Type cmd and press OK to open the command prompt.
  3. At the command prompt, type the following command and click OK: java version
  4. The above command will display the version of Java installed on your computer. The result looks like this:
  5. C: -> java -version
  6. java version “1.8.0_221”
  7. Java(TM) SE Runtime Environment (Build 1.8.0_221-b11)
  8. Java HotSpot(TM) 64-bit Server VM (Build 25.221-b11, mixed mode)
  9. If it doesn’t say “64-bit server VM”, it means that Minecraft always finds the 32-bit version.
  10. To solve this problem, you need to uninstall the old version and reinstall the 64-bit version.

Uninstalling and reinstalling Java JRE 64-bit

  1. Press the Windows + R key.
  2. Type appwiz.CPL and click OK to open the Control Panel.
  3. Select the 32-bit version of Java and click Uninstall.
  4. Also, uninstall the 64-bit Java JRE.
  5. Then install the 64-bit Java JRE you downloaded in the first step.
  6. Try allocating more memory for your Minecraft server and see if there are any improvements.

Add a new system variable

Note: Before proceeding to the next steps, create a system restore point.

  1. Press the Windows + R key to open Run.
  2. Enter control and click OK to open the Control Panel.
  3. Go to System and Security -> System.
  4. In the left pane, click Show Advanced System Settings.
  5. In the System Properties window, click Environment Variables.
  6. In the System Variables section, click New.
  7. Enter the following for the variable name and value:
  8. Variable name: _JAVA_OPTIONS.
  9. Variable value: -Xmx512M
  10. Click OK to save your changes.
  11. Click OK on all open windows.

The above procedure sets the memory size to 512MB and fixes the Minecraft server “Couldn’t reserve enough space” error.

The “Minecraft Server could not reserve enough space” error can be fixed by installing a 64-bit version of Java JRE. Since the 32-bit version is limited in memory size, installing the 64-bit version of Java removes this limitation.

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

 

Frequently Asked Questions

To fix the "Could not reserve enough space for object heap" error, add the "-Xmx(size)m" option to set the maximum memory allocation for the object heap. It should be large enough to allow your application to load into memory, but 2 GB less than the total memory allocation required.

Open the ATLauncher application. On the right side of the launcher, select Settings. Select the Java/Minecraft tab. In the Maximum MemoryRam field, enter the desired amount of RAM (in MB, not GB) or use the arrows to set the value to 0.5 GB at a time.

First of all, the 32-bit JRE cannot use more than ~1.5GB of ram. So if you need more, use the 64-bit JRE. Secondly, when you start a new JVM, it summarizes the -Xmx property of all running JVMs and checks if the system has enough memory left to run with its own -Xmx, if not, an error occurs.

  1. Log in to the application server administration server.
  2. Navigate to the JVM options.
  3. Change the -Xmx256m option. This option sets the heap size of the JVM.
  4. Set the -Xmx256m option to a higher value, such as Xmx1024m.
  5. Save the new settings.