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Editorial Team
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Asked: 2026-05-23T12:06:38+00:00

Recently I configured my instance into a micro environment in EC2 with glassfish and

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Recently I configured my instance into a micro environment in EC2 with glassfish and mysql in windows..
I deployed my war and i was able to access my site through http.

I changed my application and redeployed the war and it also worked.

When I was about to redeploy the war for 4th or 5th time, the application got deployed, I saw the message in the log file. But I was unable to access the site through http.

Then I tried the command “asadmin list-applications” and I got the following message.

Error occurred during initialization of VM 
Could not reserve enough space for object heap

After that I was not able to connect to my instance through RDP and I had to reboot, I was able to access it again after that. I started the servers again (glassfish mysql), but no luck.

I noticed that the memory usage is around 90% or more. CPU isage is low.

now I can not access my site through http. what shall i do ?

Thanks in advance !

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1 Answer

  1. Editorial Team

    Honestly, there are a couple issues working against you here:

    1) Windows requires FAR more RAM than Ubuntu to run at a minimum decent level.
    2) GlassFish has a much larger footprint than Tomcat or Jetty.

    Is there any particular reason you need Windows? Like is there a specific need that your server run some executables for file processing or something like that outside the JVM? Most would agree that Linux (Ubuntu or other) will give you much better results in performance and stability to run an App Server like GlassFish in any environment.

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