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 e

Answer 1

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