OpenVZ and Sun JRE 7

vapornode

I've created a test OpenVZ VPS with 1GB RAM (CentOS 6.3 64 bit) and installed Sun's Java 7 via RPM onto it.

When I try the command "java -version", it gives me this error:

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.

Here are 2 screenshots of user_beancounters and htop to show that it shouldn't have a problem with not having enough memory:

http://puu.sh/1xwxB
http://puu.sh/1xwDl

Any help is appreciated.

gubbyte

Try java -Xmx256m --version.

vapornode

@gubbyte Same error

Nick_A

It should work. Done it a few times without problems.

vapornode

Got it now, had to increase the privvmpages limit

concerto49

Does Sun/Oracle Java have an RPM? As far as I know that's OpenJDK and there are differences between the 2 JVMs. Hence, you might experience differences in behavior.

vapornode

@concerto49

A RPM is available on java.com for JRE 7u9

concerto49

@fizzyjoe908 said: A RPM is available on java.com for JRE 7u9

Cool - just making sure. Rarely look on java.com for JRE. Usually work with the JDK. There are slight difference, but glad it's good for ya.

Nikki

As long as you're on a newer openvz kernel there should be no problems with Java, but if you're on the .18 series you'll have some pretty bad memory issues.

vapornode

@Nikki No worries, I'm running the latest kernel

jcaleb

i just use openjdk on mine. is jrockit still available? that jvm is really good

concerto49

@jcaleb said: i just use openjdk on mine. is jrockit still available? that jvm is really good

It is but will soon be merged into OpenJDK.