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Editorial Team
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Asked: 2026-06-11T05:07:12+00:00

I’m developing web application in jsp/servlet,i had an issue with netbeans and Java. My

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I’m developing web application in jsp/servlet,i had an issue with netbeans and Java. My program needs large data process. So I used -Xmx512m to increase the maximum heap size via

Tools -> Servers -> on the Platform tab there is a VM option below
Java Platform.
Then it works fine..

Now my issue is i’m building the WAR file, directly deployed and run in my another machine Tomcat for demo,
here i’m facing the same issue java out of memory error-heap space
i also tried with

environment variable set CATALINA_OPTS=-Xms512m -Xmx512m

this also didn’t help me

how to resolve this issue?, Please point me to the right direction

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1 Answer

  1. Editorial Team

    Finally i found the solution for the issue

    in Catalina.bat file
    you can find some text like below

    set _EXECJAVA=%_RUNJAVA%
set MAINCLASS=org.apache.catalina.startup.Bootstrap
set ACTION=start
set SECURITY_POLICY_FILE=
set DEBUG_OPTS=
set JPDA=

    under that you need to put the

    set CATALINA_OPTS=-Xms512m -Xmx512m

    Heap size is larger than your computer’s physical memory. For example,

    java -Xmx2g BigApp
    Error occurred during initialization of VM
    Could not reserve enough space for object heap
    Could not create the Java virtual machine.

    The fix is to make it lower than the physical memory: java -Xmx1g BigApp

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