Could not reserve enough space for object heap

Question

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

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No need to do anything just chnage in POM file like below   lt configuration gt       lt maxmemory gt 1024M lt  maxmemory gt   lt  configuration gt

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Go to Start- Control Panel- System- Advanced tab - Environment Variables- System Variables- New   Variable name   JAVA OPTIONS Variable value  -Xmx512M

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Replace -Xmx2G with -Xms512M or any greater memory size in cassandra bat file in cassandra bin directory

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Error occurred during initialization of VM            Could not reserve enough space for 1572864KB object heap  I changed value of memory in settings grade file 1536 to 512 and it helped

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Anyway  here is how to fix it  Go to Start- Control Panel- System- Advanced tab - Environment Variables- System Variables- New  Variable name   JAVA OPTIONS Variable value  -Xmx512M  OR   Change the ant call as shown as below       lt exec            lt arg value  -J-Xmx512m    gt         lt  exec gt    It worked for me

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In case you are running a java program  - run your program in a terminal using the correct command for linux it would be  java -jar myprogram jar  and add -Xms256m -Xmx512m  for instance   java -jar myprogram jar Xms256m -Xmx512m   In case you are running a  sh script  linux  mac   or a  bat script  windows  open the script and look for the java options if they are present and increase the memory   If all of the above doesn t work  check your processes  ctrl alt delete on windows   ps aux on linux mac  and kill the processes which use allot of memory and are not necessary for your operating system     Try to re-run your program

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I got the same error and it got resolved when I deleted temp files using  temp  and restarting eclipse

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If you re running 32bit JVM  change heap size to smaller would probabaly help  You can do this by passing args to java directly or through enviroment variables like following   java -Xms128M -Xmx512M JAVA OPTS  -Xms128M -Xmx512M    For 64bit JVM  bigger heap size like -Xms512M -Xmx1536M should work   Run java -version or java -d32  java--d64 for Java7 to check which version you re running

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here is how to fix it        Go to Start- Control Panel- System- Advanced tab - Environment Variables- System  Variables- New  Variable name   JAVA OPTIONS Variable value  -Xmx512M Variable name  Path Variable value   PATH  C  Program Files Java jre6 bin F  JDK bin    Change this to your appropriate path

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I ran into this when using javac  and it doesn t seem to pick up on the command line options   -bash-3 2  javac -Xmx256M HelloWorldApp java  Error occurred during initialization of VM Could not reserve enough space for object heap Error  Could not create the Java Virtual Machine  Error  A fatal exception has occurred  Program will exit    so the solution here it so set  JAVA OPTIONS  -bash-3 2  export  JAVA OPTIONS  -Xmx256M  -bash-3 2  javac HelloWorldApp java  Picked up  JAVA OPTIONS  -Xmx256M   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

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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  set  JAVA OPTS -Xms512m -Xmx512m -XX MaxPermSize 256m

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Combined with -Xmx512M use -d64 to make sure you re running 64-bit VM  On a 64-bit machine I thought for sure I was running 64-bit virtual machine  but no  After installing 64-bit Java the -d64 option works and -Xmx allows much larger memory sizes   java -d64 -Xmx512M mypackage Test

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I had right amount of memory settings but for me it was using a 64bit intellij with 32 bit jvm  Once I switched to 64 bit VM  the error was gone

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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   -Xms2G -Xmx2G   to   -Xms256M -Xmx256M   That solved it for me  Hopefully this helps someone else here

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Error    For the error   error occurred during initialization of vm could not reserve enough space for object heap jboss    Root Cause     Improper insufficient memory allocation to our JVM as mentioned below  e g  JAVA OPTS  -Xms1303m -Xmx1303m -XX MaxPermSize 256m   in jboss-eap-6 2 bin standalone conf or   JAVA OPTS -Xms1G -Xmx1G -XX MaxPermSize 256M  in jboss-eap-6 2 bin standalone conf bat which is nothing but JVM memory allocation pool parameters    Resolution     Increase the heap size  To increase the heap size   goto -  jboss-eap-6 2 bin standalone conf bat or jboss-eap-6 2 bin standalone conf change - JAVA OPTS  -Xms256m -Xmx512m -XX MaxPermSize 256m  where -Xms is Minimum heap size and -Xmx is Maximum heap size  Usually its not recommanded to have same size for min and max  If you are running your application from eclipse  Double click on the server select  open launch configuration  you will be redirected to the window  Edit launch configuration properties   In this windown goto the tab   x  Arguments   In VM Arguments  define your heap size as mentioned below  -Dprogram name JBossTools  JBoss EAP 6 1  Runtime Server  -server -Xms256m -Xmx512m -XX MaxPermSize 256m -Dorg jboss resolver warning true

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In CASSANDRA HOME bin cassandra bat you would find following configuration   REM JVM Opts we ll use in legacy run or installation set JAVA OPTS -ea   -javaagent   CASSANDRA HOME  lib jamm-0 3 0 jar    -Xms  2G     -Xmx  2G      You can reduce 2G to some smaller number for e g  1G or even lesser and it should work   Same if you are running on unix box  change in  sh file appropriately

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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

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This can also be caused by setting something too large on a 32-bit HotSpot vm  for example   -Xms1536m -Xmx1536m   where this might would work   -Xms1336m -Xmx1336m

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Suppose your class is called Test in package mypackage  Run your code like this   java -Xmx1024m mypackage Test   This will reserve 1024 MB of heap space for your code  If you want 512 MB  you can use   java -Xmx512m mypackage Test   Use little m in 1024m  512m  etc

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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

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Sometimes it relates as    sysctl vm overcommit memory vm overcommit memory   2   If you set it to     sysctl vm overcommit memory 0   It should work

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Assuming you have enough free memory and you setup you JVM arguments correctly  you might have a problem of memory fragmentation  Check Java maximum memory on Windows XP

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Above answers are correct  but I will explain this problem with best solution  When you have assigned org gradle jvmargs -Xmx512m and still facing the sa  me problem then here is the solution   Mostly this error occurs because your pc using 100  of its power  and your project is using so many resources  whenever you face this problem you can open task manager and you will see your disk is being used 100   and your pc is too slow  then you can just disable startup apps which are high in processing and restart your pc  After restart  when you open your project first clean it and then try to run it  I have tried all above the solution but still couldn t solve the problem then I tried to free the memory usages and background processes and my problem has been solved

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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  java -version   caused the same error  which established that the problem was not specific to my application   Running   cat  proc meminfo   reported that MemFree and SwapFree were both well under 1  of the MemTotal and SwapTotal values  respectively   MemTotal      49300620 kB MemFree         146376 kB     SwapTotal      4192956 kB SwapFree          1364 kB   Stopping a few other running applications on the machine brought the free memory figures up somewhat   MemTotal      49300620 kB MemFree        2908664 kB     SwapTotal      4192956 kB SwapFree       1016052 kB   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

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Run the JVM with -XX MaxHeapSize 512m  or any big number as you need   or -Xmx512m for short

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Open gradle properties file in android folder   Replace this line   org gradle jvmargs -Xmx1536M   with   org gradle jvmargs -Xmx512m   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

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I recently faced this issue   I have 3 java applications that start with 1024m or 1280m heap size  Java is looking at the available space in swap  and if there is not enough memory available  the jvm exits   To resolve the issue  I had to end several programs that had a large amount of virtual memory allocated   I was running on x86-64 linux with a 64-bit jvm

[java] Could not reserve enough space for object heap

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