insufficient memory for the Java Runtime Environment message in eclipse

Question

When I run my Java code in Eclipse  I get the following message   There is insufficient memory for the Java Runtime Environment to continue  Native memory allocation  malloc  failed to allocate 4088 bytes for AllocateHeap An error report file with more information is saved as  E  Eclipse Workspace BTest hs err pid1888 log   I have 4GB RAM in my computer   I have changed my JRE from 1 7 to 1 8 too  But the issue seems un-resolved  I use a Win 8 system with i3 Processor and have around 20gb of free disk space in my C Drive    Eclipse version  Eclipse Juno Service release 2  I also get this message while starting Eclipse  I have attached the error message screen shot   What is causing this issue     Memory parameters in  eclipse ini  file   -startup plugins org eclipse equinox launcher 1 3 0 v20120522-1813 jar --launcher library plugins org eclipse equinox launcher win32 win32 x86 64 1 1 200 v20120913-144807 -product org eclipse epp package java product --launcher defaultAction openFile --launcher XXMaxPermSize 256M -showsplash org eclipse platform --launcher XXMaxPermSize 256m --launcher defaultAction openFile -vmargs -Dosgi requiredJavaVersion 1 5 -Dhelp lucene tokenizer standard -Xms40m -Xmx512m   Resolution  Re-installing eclipse fixed the problem

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In my case it was that the C  drive was out of space  Ensure that you have enough space available

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How to diagnose this error even when running the simple command   java -version     There is insufficient memory for the Java Runtime Environment to continue    Cannot create GC thread  Out of system resources    An error report file with more information is saved as     home2 ericlesc code java c2 hs err pid23944 log   Check the amount of free memory you have   free -m              total       used       free     shared    buffers     cached Mem          28119      26643       1475        189       2391      15368 -   buffers cache        8884      19235 Swap          5117         34       5083   Check the max number of user processes  make sure you are not over limit   ulimit -a  ps -ef   wc -l   For me  the reason this happened was because PHP had consumed too much memory allocated to me on bluehost  and the way I was able to fix it  without restarting PHP or the server   I can t   was to take the public html directory and rename it   And give it a minute for PHP to see the change  then rename it back     A bug in the php engine itself   I found a clever way to give the PHP engine a swift kick    update Feb 2016   I m getting a spike of up-votes on this because Bluehost instance PHP engines are reserving all the memory and leaving none for the JVM   In their defense  PHP is evolving into an unholy rube Goldberg machine   Bluehost as a service is on the decline

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Try to modify your eclipse ini with below  -startup plugins org eclipse equinox launcher 1 3 0 v20120522-1813 jar --launcher library plugins org eclipse equinox launcher win32 win32 x86 64 1 1 200 v20120913-144807 -product org eclipse epp package jee product --launcher defaultAction openFile --launcher XXMaxPermSize 512M -showsplash org eclipse platform --launcher XXMaxPermSize 512m --launcher defaultAction openFile -vmargs -Dosgi requiredJavaVersion 1 5 -Dhelp lucene tokenizer standard -Xms2G -Xmx3G -XX MaxPermSize 2G -XX  UseCompressedOops -XX  UseParallelGC   Once you open your eclipse you can try below  Looks like your application consumes more memory than allocated  Default   I will try two things   As suggested by Harmlezz increase your memory allocation to JVM to -Xms2g -Xmx2g  If needed increase it more and try it out  Download eclipse memory analyzer and check for what causing memory leak OR even you can use JConsole to see JVM memory utilization in order to figure out application memory leak issue

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You need to diagnosis the jvm usages like how many process is running and what about heap allocation  there exists a lot of ways to do that for example   you can use java jcmd to check number of object  size of memory  for linux you can use for example   usr jdk1 8 0 25 bin jcmd 19628 GC class histogram    tmp 19628 ClassHistogram 1 txt   here 19628 is the running application process id   You can easily check if any strong reference exists in your code or else

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Your application  Eclipse  needs more memory and JVM is not allocating enough You can increase the amount of memory JVM allocates by following the answers given here

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If you are on ec2 and wanted to do mvn build then use -T option which tells maven to use number of threads while doing build  eg mvn -T 10 clean package

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If you are using Virtual Machine  VM   allocate more RAM to your VM and your problem will be solved

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In your Eclipse installation directory you should be able to find the file eclipse ini  Open it and find the -vmargs section  Adjust the value of   -Xmx1024m   In this example it is set to 1GB

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The message above means that you re running so many programs on your PC that there is no memory left to run one more  This isn t a Java problem and no Java option is going to change this   Use the Task Manager of Windows to see how much of your 4GB RAM is actually free  My guess is that somewhere  you have a program that eats all the memory  Find it and kill it   EDIT You need to understand that there are two types of  out of memory  errors   The first one is the OutOfMemoryException which you get when Java code is running and the Java heap is not large enough  This means Java code asks the Java runtime for memory  You can fix those with -Xmx     The other error is when the Java runtime runs out of memory  This isn t related to the Java heap at all  This is an error when Java asks the OS for more memory and the OS says   Sorry  I don t have any    To fix the latter  close applications or reboot  to clean up memory fragmentation

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I know the question talking about eclipse but i got the similar issue many times with Intellij as well and the solution for it was easy    Just run the 64 bit exe not the 32 one which is always the default one

[java] "insufficient memory for the Java Runtime Environment " message in eclipse

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