Minecraft Forums
Could not reserve enough space for 2097152KB object heap
Im attempting to run minecraft with these command prompts to allow the game to run with 2GB of ram (my PC has 8 in total) Yet the game thinks im trying to use over 2 million KB of ram (which is still roughly 2gb of ram) In case if you are wondering, yes i am using the old school minecraft launcher, i never updated because i cant. The new launcher also wont run on my PC even though a few months ago i was able to use 2gb of ram and the new launcher. i have no idea what is happening
GTX 950 SSC overclocked
Intel Skylake i5 6500k 3.2 Ghz (quad core)
Corsair 8gb ddr4 ram clocked at 3000mhz
single Samsung ssd 255 GB
single Microsoft 7200rpm 600gb HDD
EVGA 600W 80+ Bronze certified
1920×1080 Acer monitor
Gigabyte motherboard (dont know which one)
Windows 7 home premium
Im attempting to run minecraft with these command prompts to allow the game to run with 2GB of ram (my PC has 8 in total) Yet the game thinks im trying to use over 2 million KB of ram (which is still roughly 2gb of ram) In case if you are wondering, yes i am using the old school minecraft launcher, i never updated because i cant. The new launcher also wont run on my PC even though a few months ago i was able to use 2gb of ram and the new launcher. i have no idea what is happening
GTX 950 SSC overclocked
Intel Skylake i5 6500k 3.2 Ghz (quad core)
Corsair 8gb ddr4 ram clocked at 3000mhz
single Samsung ssd 255 GB
single Microsoft 7200rpm 600gb HDD
EVGA 600W 80+ Bronze certified
1920×1080 Acer monitor
Gigabyte motherboard (dont know which one)
Windows 7 home premium
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I am Maven to build my Java project. After several successful build, I am now getting the following error:
In my maven.sh file that my build is using, I have added the following as the first line
I am still getting the error.
Can anyone suggest a fix?
10 Answers 10
The solution was to set the forkMode of maven-surefire-plugin to ‘never’. It seems that when tests are run, maven sure fire spawns a new JVM. Setting it to never fixed the issue.
I had the same issue and I figured Maven was not using the right jvm. You can check this with
In my case, the jvm specified in my JAVA_HOME and PATH was incorrect: I was using an x86 jdk 6 instead of an x64 jdk 7. Fixing this solved the issue.
I ran into this same issue when I was trying to build the Cloudera Navigator SDK examples. I am using a 32-bit JVM and the compile seemed to go OK but the test afterwards failed with this error:
I tried setting MAVEN_OPTS=-Xmx512m but this had no effect- it failed with the same message. Even the value of 2097152KB in the error message was still the same (strange!).
I finally figured out that the heap size value had been hard-coded for the test in the pom.xml file! It had
So the lesson from this is that if you are building something given to you by someone else (such as Cloudera) and you get an error like this, check pom.xml carefully to see if the setting is hard-coded in there.
FYI- I think that using a 64-bit JVM might have also possibly resolved this, but I can’t switch to 64-bit. We have some other stuff that we need to get this to work with that says that it only works with a 32-bit JVM (I can’t really explain in any more detail than that here).
FIX: Minecraft server could not reserve enough space
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.
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
If the issue persists even after installing the 64-bit version of Java JRE, follow these steps.
Remove and reinstall 64-bit Java JRE
2. Add a new system variable
Note: Before proceeding with the below steps, create a system restore point.
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.
The Minecraft Server Hosting’s plans are:
Upgrade or downgrade your plan at anytime by choosing one of the most secured server hosting.
Intellij occasionally unable to reserve enough space for object heap
RESOLVED check below for solution.
I’m using Intellij Idea 2017.2.2. Below is my intellij Specs.
My Intellij would only occasionally fail a maven build or a jboss server start with the error
If I were to run the maven build with the vm args of
The build would fail 9 out of 10 times (not exactly every 10th, but just randomly). But on the 10th time it would work. I simply have to keep pressing the install button until it works.
This was a major problem before was that if I don’t specify the vm args then the build would go about halfway then fail on running out of java heap space.
Specs
IntelliJ IDEA 2017.2.2
Build #IU-172.3757.52, built on August 14, 2017
Subscription is active until May 31, 2018
JRE: 1.8.0_152-release-915-b10 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
What I tested
I upgraded from Intellij 2017.1 to 2017.2 and the behavior did not change.
I also tried to do the same on Eclipse which also did not help.
Clean restart of PC, then close all the unnecessary apps, open intellij do a maven build and yet it fails, but a few more clicks and it works inconsistently as usual. (note at this moment only 6gb out of 16 is used, there is no way there is an insufficiency with memory)
This PC have 16 gb of ram. While the fails are happening about 9.5GBs are being used at that moment.
Could not reserve enough space for object heap
I am getting the following exception repeatedly each time I try to run the program.
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
I tried to increase my virtual memory (page size) and RAM size, but to no avail.
How can I eliminate this error?
26 Answers 26
This can also be caused by setting something too large on a 32-bit HotSpot vm, for example:
where this might/would work:
here is how to fix it:
Go to Start->Control Panel->System->Advanced(tab)->Environment Variables->System
Change this to your appropriate path.
I ran into this when using javac, and it doesn’t seem to pick up on the command line options,
so the solution here it so set _JAVA_OPTIONS
And this compiles fine.
This happens to me on machines with a lot of RAM, but with lower memory ulimits. Java decides to allocate a big heap because it detects the ram in the machine, but it’s not allowed to allocate it because of ulimits.
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 a 64-bit version of Java helps in these cases, the contiguous memory requirements only applies to 32-bit Java.
I got the same error and resolved this by configuring it in the run.conf.bat
Run the JVM with the configuring run.conf.bat in Jboss5x
If free memory is not available AS you are passing in the statement then please make changes in run.conf.bat
Open gradle.properties file in android folder.
Explanation: Max limit from Gradle document:
If the requested build environment does not specify a maximum heap size, the Daemon will use up to 512MB of heap.
I had similar issues. I had installed 32 bit version of Java on a 64 bit machine.
By uninstalling that version and installing 64 bit version of Java. I was able to resolve the issue.
I know there are a lot of answers here already, but none of them helped me. In the end I opened the file /etc/elasticsearch/jvm.options and changed:
That solved it for me. Hopefully this helps someone else here.
This will reserve 1024 MB of heap space for your code. If you want 512 MB, you can use:
Sometimes, this error indicates that physical memory and swap on the server actually are fully utilized!
I was seeing this problem recently on a server running RedHat Enterprise Linux 5.7 with 48 GB of RAM. I found that even just running
caused the same error, which established that the problem was not specific to my application.
reported that MemFree and SwapFree were both well under 1% of the MemTotal and SwapTotal values, respectively:
Stopping a few other running applications on the machine brought the free memory figures up somewhat:
At this point, a new instance of Java would start up okay, and I was able to run my application.
(Obviously, for me, this was just a temporary solution; I still have an outstanding task to do a more thorough examination of the processes running on that machine to see if there’s something that can be done to reduce the nominal memory utilization levels, without having to resort to stopping applications.)